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    Wyświetlanie 1-42 z 42
    Tytuł:
    Effects of Third-generation LED LCU on Nanomechanical Properties of Orthodontic Adhesives
    Autorzy:
    Bilgic, F.
    Altan, H.
    Akinci Sözer, Ö.
    Arslanoglu, Z.
    Kale, E.
    Özarslan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031919.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    Opis:
    The aim of this study was to compare the hardness and elastic modulus of orthodontic adhesives cured with different light-curing units, based on light-emitting diodes. Standardized samples of orthodontic adhesives, Transbond™ XT, Opal® Bond™ and Light Bond™ were prepared in cylinder blocks and cured for three seconds with Valo Ortho LED (Ultradent Products, South Jordan, Utah) and Valo LED High-Power Mode. After grinding and polishing, specimens were stored in distilled water at 37°C for one day. Specimens were investigated using nanoindenter. Employment of Valo Ortho unit has resulted in significantly higher elastic modules for Transbond™ XT (p=0.041). The highest nanohardness and elastic modules were measured for Transbond™ XT cured with Valo Ortho (9.47 GPa; 81.85 GPa, respectively) and lowest for Opal® Bond™ for both Valo Ortho (0.44 GPa; 14.52 GPa, respectively) and Valo High-Power groups (0.44 GPa; 11.84 GPa, respectively).
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 697-701
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanomechanical properties of different dental restorative materials
    Autorzy:
    Altan, H.
    Bilgic, F.
    Arslanoglu, Z.
    Kale, E.
    Köroğlu Kale, A.
    Altan, A.
    Sahin, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068227.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    Opis:
    The aim of this study is to determine the hardness and roughness of glass ionomer cement, glass carbomer, and compomer by nanoindentation. Three different dental restorative materials: glass ionomer cement, glass carbomer cement, and compomer were used. Disc specimens (10 mm × 1 mm) were prepared from each material using teflon mold. All specimens were light cured according to the manufacturer's instructions. The specimens were then mounted in polyacrilic resin. After grinding and polishing the specimens were stored in distilled water at 37°C for 1 day. The specimens were investigated using nanoindenter. The highest nanohardness was measured for glass ionomer cement and the lowest for glass carbomer. Regarding roughness, glass ionomer cement and compomer showed the highest mean values. Glass ionomer cement and compomer exhibited similar nanomechanical properties. Glass carbomer had superior ability to be polished up.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 394-396
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effects of Austempering and Induction Hardening on the Wear Properties of Camshaft Made of Ductile Cast Iron
    Autorzy:
    Karaca, B.
    Şimşir, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032072.pdf
    Data publikacji:
    2017-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    46.55.+d
    62.20.Qp
    Opis:
    The aim of this study is to investigate the effects of heat austempering and induction hardening on the wear properties of GGG60 ductile cast iron for camshaft production. For this purpose, camshafts have been produced by sand mould casting method. Fe-Si-Mg alloy has been used for inoculation process to achieve iron nodulization. The casting has been done between 1410-1420°C. The casted camshafts have been austenitized at two different temperatures (800 and 900°C) and time intervals (60 and 90 min) under controlled furnace atmosphere. The austenitized camshafts have been quenched into the molten salt bath at 360°C, held there for 90 min and then cooled in air. This way, austempering heat treatment has been applied. After that, surface hardening process was conducted using induction hardening machine with medium frequency. Microstructure of camshafts has been examined by optical methods and mechanical tests have been performed. Results show that austempering heat treatment increases the wear resistance of camshaft, compared to as-cast condition. Wear resistance of the camshaft increases with increasing austenitizing temperature, time and with induction hardening. The lowest weight loss of 0.62 mg has been obtained for the induction hardened camshaft austenitized at 900°C for 90 min.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 3; 448-452
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Physicomechanical Properties of Nanostructured (TiHfZrNbVTa)N Coatings after Implantation of High Fluences of N⁺ (10¹⁸ cm¯²)
    Autorzy:
    Pogrebnjak, A.
    Bondar, O.
    Borba, S.
    Piotrowska, K.
    Boiko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030134.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    Opis:
    New classes of high-entropy alloys, which consist of at least 5 main elements with atomic concentrations 5-35 at.%, are under great interest in modern material science. It is also very important to explore the limits of resistance of high-entropy alloy nitrides to implantation by high-energy atoms. Structure and properties of nanostructured multicomponent (TiHfZrNbVTa)N coatings were investigated before and after ion implantation. We used the Rutherford backscattering, scanning electron microscopy with energy dispersive X-ray spectroscopy, high resolution transmission electron microscopy and scanning transmission electron microscopy with local microanalysis, X-ray diffraction and nanoindentation for investigations. Due to the high-fluence ion implantation (N⁺, the fluence was 10¹⁸ cm¯²) a multiphase structure was formed in the surface layer of the coating. This structure consisted of amorphous, nanocrystalline and initial nanostructured phases with small sizes of nanograins. Two phases were formed in the depth of the coating: fcc and hcp (with a small volume fraction). Nitrogen concentration reached 90 at.% near the surface and decreased with the depth. Nanohardness of the as-deposited coatings varied from 27 to 34 GPa depending on the deposition conditions. However, hardness decreased to a value of 12 GPa of the depth of the projected range after ion implantation and increased to 23 GPa for deeper layers.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 217-221
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Characterization of Boro-Titanized AISI 1040 Steel
    Autorzy:
    Kon, O.
    Pazarlıoğlu, S.
    Durmaz, M.
    Sen, U.
    Sen, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401328.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.65.Lp
    62.20.Qp
    Opis:
    In this study, boro-titanizing treatment was applied to AISI 1040 steel. In the coating treatment, steel samples were pre-boronized in a slurry salt bath consisting of borax, boric acid and ferro-silicon at 900°C for 2 h, then titanized by thermo-reactive deposition technique (TRD) in a powder mixture consisting of ferro-titanium, ammonium chloride, alumina and naphthalene at 1000°C for 1-4 h. The coated samples were characterized by X-ray diffraction analysis (XRD), scanning electron microscope (SEM), glow discharge optical emission spectroscopy (GDOES) and micro-hardness tests. Coated layer formed on the pre-boronized AISI 1040 steel was compact and homogeneous. X-ray studies showed that the phases formed on the steel surfaces are TiB₂, TiC, TiN and Fe₂B. The depth of the coating layer ranged from 3.41± 0.47 μm to 6.59± 0.51 μm, depending on treatment time. A higher treatment time resulted in a thicker boro-titanized layer. The average hardness of the coating layer was 4527± 284 $HV_{0.005}$.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1211-1213
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and Research of Superhard (Zr-Ti-Cr-Nb)N Coatings
    Autorzy:
    Bondar, O.
    Postolnyi, B.
    Kravchenko, Yu.
    Shypylenko, A.
    Sobol, O.
    Beresnev, V.
    Kuzmenko, A.
    Zukowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402215.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    Opis:
    This work presents the results of (Zr-Ti-Cr-Nb)N superhard coatings research. The samples were fabricated by the vacuum-arc deposition method (Arc-PVD). Structure, composition and properties of these coatings were studied. The study of coatings was carried out using scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Hardness measurements and adhesion tests were performed. The coatings thickness was up to 6.2 μ m, nanocrystallites sizes ranged from 4 to 7.3 nm. Values of hardness and cohesive strength were H=43.7 GPa and $L_{C}$=62.06 N, respectively. The optimal conditions for coating deposition were found.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 867-870
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Properties of Fe-Ni-Al-Si Alloys Produced by Powder Metallurgy
    Autorzy:
    Novák, P.
    Mejzlíková, L.
    Hošek, V.
    Martínek, M.
    Marek, I.
    Michalcová, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418514.pdf
    Data publikacji:
    2012-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Dk
    62.20.Qp
    Opis:
    Reactive sintering powder metallurgy is a simple alternative to conventional melting and powder metallurgy processes. During this process, pressed powder mixture of pure metals or other precursors is transformed into bulk intermediary phases by thermally activated in situ reaction. This process was previously tested on Fe-Al and Fe-Al-Si alloys. Positive effect of silicon on the reactive sintering behaviour was determined, leading to the development of novel carbon-free high-silicon FeAl20Si20 alloy (given in wt%). In this work, the effect of nickel on the pressureless reactive sintering of Fe-Al-Si pressed powder mixtures was studied. To explain the nickel influence, differential thermal analysis was utilized. Microstructure, phase composition and porosity of the FeAl20Si20Nix (x = 0, 5, 10, 20 wt%) alloys was described. Hardness, wear resistance, high-temperature oxidation resistance and thermal stability were evaluated as functions of nickel content. Results showed that porosity decreases with growing nickel content down to less than 3 vol.%. Oxidation rate of these alloys is more than 10 times lower than that of original FeAl20Si20 alloy. Thermal stability and abrasive wear resistance of these alloys is also superior to Fe-Al and Fe-Al-Si materials.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 3; 524-527
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanomechanical comparison of commonly used dental crown cements to a newly developed one
    Autorzy:
    Kale, E.
    Arslanoğlu, Z.
    Altan, H.
    Bılgıç, F.
    Tuzlali, M.
    Köroğlu, A.
    Özarslan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1054940.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    62.20.de
    Opis:
    The main goal of nanoindentation tests is to obtain elastic modulus and hardness of the specimen material from load-displacement measurements. With this study, it was aimed to establish a quantitative relationship between the nanomechanical properties of commonly used dental cements in comparison to a newly developed crown cement and to predict its performance potential. Nanomechanical properties of polycarboxylate cement (PCC), glass-ionomer cement (GIC), dual-cure self-adhesive cement (SAC) and a newly developed glass-carbomer cement (GCC) were investigated by nanoindentation tests. All samples were fabricated according to their respective manufacturer's instructions. Available damage on the surface due to manipulation was removed by grinding with 1200, 2400 and 4000 grit sandpaper, and then polishing on 6, 3, and 1 μm diamond-lap-wheel was performed. Nano-mechanical measurements were done using nanoindenter machine with resolution less than 1 nN and displacement resolution of 0.04 nm. Berkovich diamond indenter tip was used for the nanoindentation tests. For each indentation, a set of nanoindentation tests at least on 6 different locations per specimen surface were performed to obtain more representative mean results. Indentation test load-displacement curves were analysed using Oliver-Pharr method, and one-way ANOVA or Kruskal-Wallis test, following Kolmogorov-Smirnov and Shapiro-Wilk, was used to compare the results. Nanohardness (H_{nano}) values were 0.52± 0.25, 0.45± 0.18, 1.03± 0.82 and 0.43± 0.18 GPa for GIC, GCC, PCC, and SAC, respectively. Reduced elastic modulus (E_{r}) values were 9.51± 6.17, 11.77± 5.04, 27.37± 20.61, 10.33± 5.08 GPa for GIC, GCC, PCC, and SAC, respectively. There was no statistical difference between the tested materials. PCC was the hardest, and GIC was the least hard material, whereas the newly developed GCC was the second, in terms of H_{nano}, before SAC. PCC also had the highest E_{r} mean, compared to the other dental crown cements, suggesting lower elastic properties. SAC was more elastic than GCC and less elastic than GIC. GCC had the second highest E_{r}, standing closer to SAC and GIC. Within the limitations of the current study, it can be concluded that the newly developed glass-carbomer cement is comparable to the other tested commonly used dental crown cements, regarding H_{nano} and E_{r}.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 954-958
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of rare earth element on the mechanical properties of ZE41 magnesium alloys produced by mechanical alloying
    Autorzy:
    Sahin, O.
    Haluk Ertsak, F.
    Oztekin, K.
    Ozarslan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065306.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Fe
    62.20.Qp
    Opis:
    In this work, we have intended to synthesize ZE41 Magnesium alloys having varying content of Ce of 0.3, 0.6 and 0.9 wt.% and to investigate mechanical properties of these alloys. Alloys were produced by mechanical alloying under argon atmosphere. Structural, and mechanical properties of these alloys were investigated by means of XRD, SEM and nanoindenter analysis. From the XRD data it is found that as the Ce content increases, the crystallite size also increases. On the other hand, the hardness of the alloys decreases with the increasing Ce content. Indentation results show that the measured hardness displays a peak load dependence. Load-independent hardness was calculated by Hays-Kendall approach. As a results, it was found that Ce-doping modifies the microstructure and hardness of the alloy.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 289-292
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vickers and Knoop Indentation Microhardness Study of β-SiAlON Ceramic
    Autorzy:
    Güder, H.
    Şahin, E.
    Şahin, O.
    Göçmez, H.
    Duran, C.
    Ali Çetinkara, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492772.pdf
    Data publikacji:
    2011-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    62.20.de
    Opis:
    In this paper, analysis and interpretation of mechanical property measurements of β-SiAlON ceramic were reported. Indentation microhardness of β-SiAlON ceramic was measured using the Knoop and Vickers indenters. The analysis of the Vickers indentation microhardness data reveals the reverse indentation size effect that is the apparent microhardness increases with increasing applied indentation test load. However, the Knoop indentation microhardness data exhibit indentation size effect that is the apparent microhardness increases with decreasing applied test load. The experimental Knoop microhardness data was analyzed using Meyer's law, elastic-plastic deformation model, proportional specimen resistance model, and Hays-Kendall's model. As a result, modified proportional specimen resistance model is found to be the most effective one for the load-independent $(H_{LI})$ microhardness determination of the SiAlON ceramic. It was seen that different models used to analyze the data obtained from the Vickers indentation do not give the same intrinsic hardness value. We also present the calculation of the Young modulus, E, of the β-SiAlON ceramic.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 6; 1026-1033
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microhardness and the Young Modulus of Thin, MBE-Grown, (Sn,Mn)Te Layers Containing up to 8% of Mn
    Autorzy:
    Adamiak, S.
    Zięba, M.
    Minikayev, R.
    Reszka, A.
    Taliashvili, B.
    Szuszkiewicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033220.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.de
    62.20.Qp
    68.60.Bs
    Opis:
    The thin layers of (Sn,Mn)Te solid solution were grown by molecular beam epitaxy onto (111)-oriented BaF₂ substrates and characterized by scanning electron microscopy, atomic force microscopy, energy dispersive X-ray spectrometry, and X-ray diffraction methods. The epitaxial character of the growth was confirmed. All the layers exhibited a regular (fcc) structure of the rock-salt type and were (111)-oriented, their thickness was close to about 1 μm. The layers contained up to 8% of Mn. The microhardness and the Young modulus values were determined by the nanoindentation measurements. The Berkovich type of the intender was applied, the maximum applied load was equal to 1 mN. The results of measurements demonstrated a lack of the composition dependence of the Young modulus value. A slight increase of the microhardness value with an increasing Mn content in the (Sn,Mn)Te solid solution was observed.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 347-350
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Powder Metallurgy Preparation of Co-Based Alloys for Biomedical Applications
    Autorzy:
    Marek, I.
    Novák, P.
    Mlynár, J.
    Vojtěch, D.
    Kubatík, T.
    Málek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402090.pdf
    Data publikacji:
    2015-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Qp
    62.20.F-
    64.70.kd
    Opis:
    Co-based alloys represent very important group of materials used for medical applications. Currently, fabrication of these materials is preferentially done by casting or forming. Production by powder metallurgy techniques is less common. However, powder metallurgy fabrication of these alloys brings advantages such as reduced machining, possibility of alloying by high-melting elements, preparation of nanocrystalline materials with enhanced mechanical properties or producing of porous alloys with improved ability to integrate into issues. In this work, our attention was focused on fundamental preparation of an CoCrMo alloy by two methods of powder metallurgy. In the first method, pure metallic powders were mixed, pressed and sintered in vacuum furnace. The second applied technology consisted of mechanical alloying using planetary ball mill and compaction by spark plasma sintering technique. A series of samples was prepared under various conditions by these procedures. Dependence of microstructure, phase composition and mechanical properties of prepared samples on fabrication conditions (milling parameters, sintering temperature etc.) was studied. Obtained results were compared with properties of commercial cast cobalt alloy used for medical applications.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 4; 597-601
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Properties of Multilayer Nanostructured Coatings TiN/MoN Depending on Deposition Conditions
    Autorzy:
    Pogrebnjak, A.
    Abadias, G.
    Bondar, O.
    Postolnyi, B.
    Lisovenko, M.
    Kyrychenko, O.
    Andreev, A.
    Beresnev, V.
    Kolesnikov, D.
    Opielak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365941.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-g
    Opis:
    This work presents the results of TiN/MoN coatings studying. These multilayer nanostructured coatings demonstrate dependence on depositions conditions on nanometer level. The influence of nanosized monolayer thickness on structure changing and properties of nanocomposite multilayer coatings TiN/MoN was found. Multilayer TiN/MoN coatings of the total thickness from 6.8 to 8.2 μm were obtained using C-PVD method. Thicknesses of monolayers were 2, 10, 20, 40 nm. The structure of samples was studied using X-ray diffraction (Bruker D-8 Advance) in Cu $K_{α}$ radiation, high resolution transmission electron microscopy with diffraction CFEI EO Techai F200, scanning electron microscopy with energy dispersive X-ray spectroscopy (JEOL-7001F), and microhardness measurements in dependence on indenter load. Scratch tests (friction, wear, etc.) were also provided using Rockwell-C diamond indenter (CSM Revetest Instruments) with a tip radius of 200 μm. Friction and wear behavior were evaluated using ball-on-plate sliding test on a UMT-3MT tribometer (CETR, USA). With decreasing monolayer thickness the hardness value increases, and the size of nanograins reduces. The values obtained for the friction coefficient of the multilayer system is much smaller than in nanostructured coatings of TiN (nc) or MoN (nc). Annealing showed formation of a (Ti,Mo)N solid solution and small growth of nanocrystals.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1280-1283
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Deposition Parameters and Thermal Annealing on the Structure and Properties of Nitride Coatings (TiHfZrVNb)N
    Autorzy:
    Pogrebnjak, A.
    Abadias, G.
    Chartier, P.
    Bondar, O.
    Yakuschenko, I.
    Takeda, Y.
    Krause-Rehberg, R.
    Kolesnikov, D.
    Beresnev, V.
    Partyka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365973.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-g
    Opis:
    Results of structure, phase composition, physical and mechanical properties and tribological properties investigations of nitride high-entropy coatings (TiZrHfVNb)N are presented in the paper. Proton microbeam (μ-PIXE), X-ray diffraction method, including method of X-ray strains measurements, energy dispersive X-ray spectroscopy and scanning electron microscopy analysis, microhardness testing and nanoindentation were used. Thermal annealing (t=600°C) influence on defect profiles, structure and element distribution in the coatings was investigated. It was found that thermal treatment of coatings leads to changing of defect profiles and to element redistribution. Also we can say that it influences less on grain size changing. Investigated (TiZrHfVNb)N coatings demonstrate high values of hardness and excellent wear resistance.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1296-1298
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Properties of Boronized AISI 316, AISI 1040, AISI 1045 and AISI 4140 Steels
    Autorzy:
    Calik, A.
    Sahin, O.
    Ucar, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808113.pdf
    Data publikacji:
    2009-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    68.35.Fx
    Opis:
    In this study, some mechanical properties of borided and unborided four steels were investigated. Boronizing of steels was performed by powder pack method at 1210 K for 4 h. The hardness of borides, boride layer thickness and room temperature tensile properties were measured and it was observed that hardness and tensile properties strongly depend on chemical composition of steels. In addition, the effect of a notch on impact behavior was examined by conducting the Charpy tests on borided and unborided steels. The greatest notch toughness was found for a steel AISI 316 with a microstructure consisting of different C, Ni and Cr chemical composition compared to AISI 1040, 1045 and 4140 steels.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 3; 694-698
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Thermal Treatment on the Structure and Mechanical Properties of Coatings Based on (Ti, Hf, Nb, Si)N
    Autorzy:
    Pogrebnjak, A.
    Komarov, F.
    Sobol, O.
    Kaverina, A.
    Shypylenko, A.
    Karwat, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1198976.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-g
    Opis:
    Current paper presents the results of investigating of nanostructured cathode arc vacuum evaporation coatings, based on (Ti, Hf, Nb, Si)N. Several methods of the structural and elemental analysis were used: proton microbeam, nano- and micro-electron beam, X-ray diffraction analysis. To determine tribological properties (scratch resistance, adhesive and cohesive strength) of the coatings, scratch testing were conducting. Influence of thermal annealing at temperatures 300, 500, 800, 1000C on elemental composition, microstructure, residual stress, phase composition, profiles of atomic distribution in the coatings were investigated.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1312-1315
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multicomponent (Ti-Zr-Hf-V-Nb)N Nanostructure Coatings Fabrication, High Hardness and Wear Resistance
    Autorzy:
    Pogrebnjak, A.
    Beresnev, V.
    Kolesnikov, D.
    Bondar, O.
    Takeda, Y.
    Oyoshi, K.
    Kaverin, M.
    Sobol, O.
    Krause-Rehberg, R.
    Karwat, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400429.pdf
    Data publikacji:
    2013-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-g
    Opis:
    First results in the field of synthesis and research of the multicomponent (Ti-Zr-Hf-V-Nb)N nanostructured coatings are presented in the paper. Influence of processes of spinodal segregation and mass-transfer on single-layered or multilayered crystal boundary (second phase) forming were explored. Superhard nanostructured coatings were investigated before and after annealing at the temperature 600°C using unique methods (slow positron beam, proton microbeam particle induced X-ray emission-μ, Rutherford backscattering-analysis, scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diffraction analysis was performed using DRON-4 and nanoindentor). Diffraction spectra were taken point-by-point, with a scanning step 2Θp=0.05 to 0.1°. We detected that positron trapping by defects was observed on the nanograins boundaries and interfaces (vacancies and nanopores which are the part of triple and larger grain's boundary junction). The 3D distribution maps of elements obtained by the proton microbeam (particle induced X-ray emission-μ) together with the results obtained by slow positron microbeam gave us comprehensive information about physical basis of the processes, connected with diffusion and spinodal segregation in superhard coatings.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 5; 816-818
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Nanoscale TiN/MoN Multilayered Systems, Fabricated Using Arc Evaporation
    Autorzy:
    Pogrebnjak, A.
    Bondar, O.
    Abadias, G.
    Eyidi, D.
    Beresnev, V.
    Sobol, O.
    Postolnyi, B.
    Zukowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402193.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-g
    Opis:
    Using the vacuum-arc evaporation method we fabricated periodic multilayered TiN/MoN structures with different bilayer periods λ ranging from 8 to 100 nm. We found that molybdenum nitride and titanium nitride layers grown on steel show local partial epitaxy and columnar growth across interfaces. A molybdenum-titanium carbide interlayer was evidenced between the substrate and the multilayer. Molybdenum nitride and titanium nitride layers contain small (5÷30 nm) grains and are well crystallized with (100) preferred orientation. They were identified as stoichiometric fcc TiN and cubic γ-M₂N. Non-cubic molybdenum nitride phases were also detected. The hardness of the obtained structures achieved great values and maximal hardness was 31÷41.8 GPa for the multilayered structure with a 8 nm period. Hardness of the obtained coatings is 25÷45% higher in comparison with the initial single-layer nitride coatings, plasticity index of multilayered structure is 0.075.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 836-840
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multilayered Nano-Microcomposite Ti-Al-N/TiN/$Al_2O_3$ Coatings. Their Structure and Properties
    Autorzy:
    Pogrebnjak, A.
    Shpak, A.
    Kirik, G.
    Erdybaeva, N.
    Il'yashenko, M.
    Dem'yanenko, A.
    Kunitskii, Yu.
    Kaverina, A.
    Baidak, V.
    Makhmudov, N.
    Zukowski, P.
    Komarov, F.
    Beresnev, V.
    Ruzimov, Sh.
    Shypylenko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1503960.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-q
    Opis:
    This paper presents the first results on formation and study of structure and properties of micro- and nanocomposite combined coatings. By means of modeling the deposition processes (deposition conditions, current density-discharge, plasma composition and density, voltage) we formed the three-layer nanocomposite coatings of Ti-Al-N/Ti-N/$Al_2O_3$. The coating composition, structure and properties were studied using physical and nuclear-physical methods. The Rutherford proton and helium ion backscattering, scanning electron microscopy with microanalysis, grazing incidence X-ray diffraction, as well as nanohardness tests (hardness) were used. Measurements of wear resistance and corrosion resistance in NaCl, HCl and $H_2SO_4$ solutions were also performed. For testing mechanical properties such characteristics of layered structures as hardness H, elastic modulus E: $H^3//E^2$ etc. were measured. It is demonstrated that the formed three-layer nanocomposite coatings have hardness of 32 to 36 GPa and elastic modulus of 328 ± 18 to 364 ± 14 GPa. Its wear resistance (cylinder-surface friction) increased by factor of 17 to 25 in comparison with the substrate (stainless steel). The layers thickness was in the range of 56-120 μm.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 94-99
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Properties of Nano- and Microcomposite Coating Based on Ti-Si-N/WC-Co-Cr
    Autorzy:
    Pogrebnjak, A.
    Shpak, A.
    Beresnev, V.
    Il'yashenko, M.
    Komarov, F.
    Shypylenko, A.
    Kaverin, M.
    Zukovski, P.
    Kunitskyi, Y.
    Kolesnikov, D.
    Kolisnichenko, O.
    Makhmudov, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1503969.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-g
    Opis:
    Using the two technologies: plasma-detonation and vacuum-arc deposition, we fabricated two types of coatings: Ti-Si-N/WC-Co-Cr/steel and Ti-Si-N/steel. We found that the top coating of Ti-Si-N was nanostructured one with 12 to 15 nm grain sizes and H = 40 to 38 GPa hardness. A thick coating which was deposited using the pulsed plasma jet, demonstrated 11 to 15.3 GPa hardness, an elastic modulus (E) changing within 176 to 240 GPa, and tungsten carbide grain dimensions varying from 150 to 350 nm to several microns. An X-ray diffraction analysis shows that the coating has the following phase composition: TiN, (Ti,Si)N solid solution, WC, $W_2C$ tungsten carbides. An element analysis was performed using energy dispersive spectroscopy (microanalysis) and scanning electron microscopy, as well as the Rutherford backscattering of $\text{}^4He^{+}$ ion and the Auger electron spectroscopy. Surface morphology and structure were analyzed using scanning electron microscopy and scanning tunnel microscopy. Tests friction and resistance (cylinder-plane) demonstrated essential resistance to abrasive wear and corrosion in the solution. The decrease of grain dimensions ≤ 10 nm occurring in the top Ti-Si-N coating layer increased the sample hardness to 42 ± 2.7 GPa under $Ti_{72}-Si_8-N_{20}$ at.% concentration.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 100-104
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Structural Properties of Fe-Ti-B Based Alloys Produced by Mechanical Alloying
    Autorzy:
    Kon, O.
    Sen, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401329.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.20.Ev
    06.30.Dr
    62.20.Qp
    Opis:
    In the present study, the production of Fe-Ti-B based alloys was realized and their structure and properties were investigated. Mechanical alloying proceeds by the continual cold welding and fracturing of the constituent mixture of Ti+4B+5Fe powder when subjected to the large compressive forces of a high speed mill. The powder charge together with 7 mm diameter steel balls were loaded into a tool steel grinding container at approximately 350 RPM for 20 h. The samples were shaped as cylinder of Ø15×8 mm dimensions by uniaxial pressing at 450 MPa. Then, the green body materials were produced by sintering at 1100°C for 1-4 h in argon atmosphere. The morphology of composite materials was investigated by optical microscopy and scanning electron microscopy and phase analysis was realized by x-ray diffraction analysis. The bulk densities of the materials were measured using by Archimedes method. Also, the micro-hardness of the samples was measured by Vickers indentation technique. As a result, Fe, iron boride (FeB, Fe₂B) and titanium boride (TiB₂) phases were detected in the phase analysis of the Fe-Ti-B based materials. The hardness of the materials was measured between 1107 $HV_{0.05}$ and 1551 $HV_{0.05}$, depending on sintering time. The densities of the samples were determined between 4.205 g/cm³ and 4.219 g/cm³.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1214-1217
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Hardness and Wear Behaviour οf Boronized and Carburized AISI 8620 Steels
    Autorzy:
    Calik, A.
    Duzgun, A.
    Ekinci, A.
    Karakas, S.
    Ucar, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1585043.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.M-
    62.20.Qp
    68.35.Fx
    Opis:
    In this study, the hardness and wear behaviour of carburized and boronized AISI 8620 steels have been studied. The boronizing treatment increased the hardness of AISI 8620 steels from 395 $HV_{0.1}$ to a maximal 1610 $HV_{0.1}$ compared to the carburized steels and also significantly improved its wear behaviour. From obtained results, it can be concluded that boronizing is very effective surface hardening method for improving the wear properties of AISI 8620 steels.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 6; 1029-1032
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Parameters on Dry Sliding of Chopped Bamboo Reinforced Epoxy Composites Based on the Taguchi Method
    Autorzy:
    Ozsoy, N.
    Ozsoy, M.
    Mimaroglu, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191719.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Qk
    07.05.Fb
    62.20.Qp
    Opis:
    Chopped bamboo-reinforced epoxy composites were fabricated and tested to investigate their tribological properties. Three different weight fractions of 6%, 8% and 10% were used as reinforcement in the composites. Wear behaviour of composites was investigated by pin on disc wear testing device. To analyse the results the design of experiments (DOE) approach by using the Taguchi method was employed. Three different parameters (load, sliding speed, weight fractions) with three levels were chosen in design of experiments. Signal to noise ratio and analysis of variance (ANOVA) were used to investigate the influence of parameters on the wear rate and the coefficient of friction. According to the results, load was the most effective parameter for both wear rate and coefficient of friction.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 687-689
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Boriding of binary Ni-Ti and ternary Ni-Ti-Cu shape memory alloys
    Autorzy:
    Ucar, N.
    Turku, N.
    Ozdemir, A.
    Calik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065676.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Dk
    61.72.-y
    62.20.Qp
    Opis:
    In this work, the boriding of binary (Ni-Ti) and ternary (Ni-Ti-Cu) shape memory alloys was carried out in a solid medium at 1173 K for 8 h using the powder pack method with Ekabor-Ni powders. Characterization of boride layer formed on the surface of alloys was identified by optical microscopy and scanning electron microscopy. TiB₂, NiB₂ and SiC phases in the boride layer of borided binary (Ni-Ti) and ternary (Ni-Ti-Cu) shape memory alloys was confirmed by X-ray diffraction analysis. The microhardness and thickness of the boride layers were measured. The obtained hardness values show a hardness anomaly due to porosity and structural defects with increase of Cu content, while a decrease in the value of hardness moving from the boride layer to main structure was observed.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 492-495
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Properties of Me/Si Structures Prepared by Means of Self-Ion Assisted Deposition
    Autorzy:
    Tashlykov, I.
    Żukowski, P.
    Mikhalkovich, O.
    Baraishuk, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1198974.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.uf
    82.80.-d
    62.20.Qp
    Opis:
    In this paper a composite structure, topography, wettability and nanohardness of a (100) Si surface modified by means of ion-assisted deposition of metal (Me) coatings in conditions of a self-irradiation are discussed.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1306-1308
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological Properties of AISI 316L Steel Surface Layer Implanted with Rare Earth Element
    Autorzy:
    Sartowska, B.
    Barlak, M.
    Waliś, L.
    Starosta, W.
    Senatorski, J.
    Kosińska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402235.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Qp
    68.55.Nq
    81.40.Pq
    Opis:
    Stainless steels with their very good corrosion resistance are used in nuclear, petrochemical, chemical, pulp and paper chemical industries as well as in food processing and others. Unfortunately, poor tribological properties of this kind of steel can be the limitation in the situations in which wear can be responsible for material degradation, like corrosion-erosion. Improvement of the wear resistance of austenitic stainless steels can be achieved using different methods of surface modification, for example: enrichment of the surface layer with reactive elements. Rare earth elements were implanted to AISI 316L austenitic stainless steel using the MEVVA type implanter (65 kV). Different rare earth elements implanted doses: 10¹⁵, 5×10¹⁵, and 5×10¹⁶ ion/cm² were applied. Initial and modified surfaces were investigated using scanning electron microscopy, elemental analysis with the energy dispersive spectroscopy method, X-ray diffraction analysis and the Rutherford backscattered spectroscopy. Tribological properties were investigated using the Amsler method. The most important result was that the surface layers of AISI 316L steel implanted with rare earth elements showed improvement of tribological properties as compared with the initial material.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 923-926
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Parameters on Tribological Behaviour of E-Glass Fiber Reinforced Epoxy Composites
    Autorzy:
    Ozsoy, N.
    Ozsoy, M.
    Mimaroglu, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402531.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Qk
    07.05.Fb
    62.20.Qp
    Opis:
    E-glass fiber reinforced epoxy composites were fabricated by hand lay up method and tested for investigating tribological behaviours. Wear behaviours of composites 0°, 90° and [0°/90°] oriented were investigated by pin on disc wear tester device for a constant distance (1000 m) and the design of experiments approach using the Taguchi method was employed. The tests were conducted sliding against a steel disc (60 HRC) under different sliding and loading conditions. Signal to noise ratio and analysis of variance (ANOVA) were used to investigate the influence of parameters on the wear rate and coefficient of friction.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-55-B-58
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Study of the Behavior of Constrained Groove Pressed Magnesium Alloy after Heat Treatment
    Autorzy:
    Zimina, M.
    Bohlen, J.
    Letzig, D.
    Kurz, G.
    Poková, M.
    Knapek, M.
    Zrník, J.
    Cieslar, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402154.pdf
    Data publikacji:
    2015-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.F-
    62.20.Qp
    81.05.Bx
    81.05.Zx
    Opis:
    In this work twin-roll cast AZ31 magnesium strip of thickness 5.6 mm was subjected to the heat treatment and further constrained groove pressing. A comparison of the microstructure and microhardness of as-cast, constrained groove pressed and annealed material was carried out. The twin-roll cast strip exhibits an inhomogeneous structure which is replaced by a finer and uniform recrystallized one after aging at 450°C for 10 h. A significant increase of the microhardness was observed accompanied by a pronounce grain refinement. Nevertheless, the distribution of the grain size is unequal along the specimen width. Thermal stability of the deformed structure during subsequent annealing was investigated. It was shown that higher annealing temperatures result in a formation of a more uniform recrystallized structure and in a significant drop of microhardness down to the values obtained for as-cast alloy.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 4; 775-778
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Properties of the Stellite 6 Cobalt Alloy Implanted with Nitrogen Ions
    Autorzy:
    Budzyński, P.
    Kamiński, M.
    Wiertel, M.
    Pyszniak, K.
    Droździel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030127.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.Ln
    62.20.Qp
    61.82.Bg
    61.80.-x
    Opis:
    The effect of nitrogen ion implantation on Stellite 6 cobalt alloy was investigated. In this research, cobalt alloy was implanted with 65 keV nitrogen ions at the fluence of (1÷10)×10¹⁶ N⁺/cm². The distribution of implanted nitrogen ions and vacancies produced by them was calculated using the SRIM program. The surface morphology was examined and the elemental analysis was performed using scanning electron microscopy, energy dispersive X-ray spectroscopy and grazing incidence X-ray diffraction. The wear tests were conducted with the use of the pin-on-disc method. The results demonstrate that implantation with nitrogen ions significantly reduces the friction factor and wear. The friction coefficient of the implanted sample at the fluence of 1×10¹⁷ N⁺/cm² increased to the values characteristic of an unimplanted sample after 5000 measurement cycles. The depth of the worn trace was about 2.0 μm. This implies that the thickness of the layer modified by the implantation process is ≈2.0 μm and exceeds the initial range of the implanted ions by an order of magnitude. This is referred to as a long-range implantation effect. The investigations have shown that the long-range effect is caused by movement of not only implanted nitrogen atoms but also carbon dopant atoms towards the friction zone. Diffusion of carbon atoms has been documented here for the first time. Furthermore, the increased content of oxygen atoms on the track bottom indicates a dominant oxidative wear of the Stellite samples after nitrogen implantation with the energy 65 keV and the fluences of 5×10¹⁶ and 10¹⁷ N⁺/cm².
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 203-205
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of aluminum addition to Nb-Al-C-N coatings on AISI M2 steel obtained by thermo-reactive deposition technique
    Autorzy:
    Abakay, E.
    Sen, S.
    Sen, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1061918.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.40.Gh
    81.40.Ef
    62.20.Qp
    81.05.-t
    Opis:
    In this study, aluminum-doped (1 and 2 wt.%) and Al-free niobium carbo-nitride coatings were applied to the surface of AISI M2 high speed steel using the process of thermo-reactive deposition technique (TRD) at 1000°C during 1-4 h. The obtained coatings were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) analysis and micro hardness test. Nb-Al-C-N layers were compact and homogeneous. X-ray diffraction analysis has shown that the major phases formed in the coating layer are Nb₂CN and NbN. The depth of the coating layer had increased with the treatment time and ranged from 6.65 to 9.05 μm. The measured values of the hardness of the coating layers were ranging between 2136 and 2636 HK_{0.005}.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 653-655
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Properties of Cr-Al-N Based Coatings Formed on AISI D2 Steel by Thermo-Reactive Diffusion Technique
    Autorzy:
    Kılınc, B.
    Sen, U.
    Sen, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399772.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.-z
    62.20.Qp
    68.55.J-
    81.65.Lp
    Opis:
    In this study, chromium aluminum nitride coating was applied on pre-nitrided AISI D2 steel by the thermo-reactive deposition technique in a powder mixture consisting of ferrochromium, aluminum, ammonium chloride, and alumina at 1000C for 2 h. Steels were gas nitrided for the purpose to enrich the surfaces with nitrogen of the steels in a nitrogen and ammonia atmosphere at 560C for 8 h. The effect of aluminum content in the powder mixture on the Cr-Al-N layer properties was investigated. The coated samples were characterized by X-ray diffraction analysis, scanning electron microscope, and micro-hardness tests. Chromium aluminum nitride layer formed on the pre-nitrided AISI D2 steel was compact and homogeneous. Electron dispersive spectrometer results showed that coating layer includes chromium, aluminum, and nitrogen. X-ray studies showed that the phases formed in the coating layers on the steel surfaces are $Cr_2N$, $(Cr,Fe)_2N_{1-x}$, $AlN$, and $Fe_2N$. The depth of the Cr-Al-N layer ranged from 10.01 ± 1.2 to 13.2 ± 1.7 μm, depending on the aluminum content. The hardness of the coated layers produced on AISI D2 steel are changing from 1743 ± 150 $HV_{0.01}$ to 2067 ± 160 $HV_{0.01}$ depending on bath compositions.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 271-273
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Long-Range Effect in Ion-Implanted Titanium Alloys
    Autorzy:
    Budzynski, P.
    Sielanko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402208.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.Ln
    62.20.Qp
    61.82.Bg
    61.80.-x
    Opis:
    Surface modification of titanium alloy (Ti6Al4V) by nitrogen ion implantation and ion beam-assisted deposition (C, N) was investigated. The depth distribution of implanted nitrogen atoms was analysed using the Rutherford backscattering technique. Nitrogen implantation reduces the coefficient of friction and wear. A better effect can be obtained when nitrogen implantation is combined with carbon deposition. Based on the changes in the coefficients of friction and wear as well as profilograms of wear tracks, the improvement of the tribological properties was found at a depth exceeding nearly 5 times the range of the implanted nitrogen ions. Identification of the long-range effect for Ti6Al4V alloy was performed on the basis of tribological analyses. This study is a continuation of research conducted for AISI 316L and H11 steel.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 841-844
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical and Tribological Behaviour of Chopped E-Glass Fiber-Reinforced Epoxy Composite Materials
    Autorzy:
    Ozsoy, N.
    Ozsoy, M.
    Mimaroglu, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031191.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Qk
    07.05.Fb
    62.20.Qp
    81.70.Bt
    Opis:
    Chopped E-glass fiber-reinforced epoxy composites (10%, 30% and 50%) were fabricated and their mechanical and tribological behaviour was investigated. Three-point bending tests were performed according to the ASTMD790 and tensile tests were performed according to the ASTMD638 standards. Impact tests and hardness measurements of the composites were also carried out. Wear behaviour of composites was studied using pin on disc wear testing device. The design of experiments approach, using Taguchi method, was employed to analyze the results. Signal-to-noise ratio and analysis of variance were used to determine the influence of parameters on the wear rate and coefficient of friction.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 852-856
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Surface Properties of Shot Peened TI6AL4V Alloy
    Autorzy:
    Yıldıran, Y.
    Avcu, E.
    Sınmazçelik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401227.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Qp
    81.65.-b
    81.05.Bx
    68.35.bd
    Opis:
    As an important surface treatment method, shot peening (SP) is widely used in automotive and aerospace industries in order to improve surface properties. In the present study SP was performed on the α-β titanium alloy Ti6Al4V under various parameters (particle impingement angle, particle acceleration pressure and particle size) by using a specially designed shot peening test rig. It is aimed to optimize surface roughness and hardness of the shot peened Ti6Al4V alloy under various parameters. In order to achieve this goal shot peened samples were investigated in detail by using a non-contact laser optical profilometer and surface hardness of the samples was measured by using a micro-hardness instrument. The surface roughness values, 3D surface morphologies and micro-hardness of the samples were obtained and examined. The results show that particle impingement angle, particle acceleration pressure and particle size dramatically affect the surface properties of the Ti6Al4V alloy.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 984-986
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Grain Size on Mechanical Properties of Irradiated Mono- and Polycrystalline $MgAl_2O_4$
    Autorzy:
    Jagielski, J.
    Piatkowska, A.
    Aubert, P.
    Labdi, S.
    Maciejak, O.
    Romaniec, M.
    Thomé, L.
    Jozwik, I.
    Debelle, A.
    Wajler, A.
    Boniecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1503999.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.80.Jh
    61.82.Ms
    62.20.Qp
    68.37.Ps
    Opis:
    The influence of the size of crystalline regions on mechanical properties of irradiated oxides has been studied using a magnesium aluminate spinel $MgAl_2O_4$. The samples characterized by different dimensions of crystalline domains, varying from sintered ceramics with grains of few micrometers in size up to single crystals, were used in the experiments. The samples were irradiated at room temperature with 320 keV $Ar^{2+}$ ions up to fluences reaching 5 × $10^{16} cm^{-2}$. Nanomechanical properties (nanohardness and Young's modulus) were measured by using a nanoindentation technique and the resistance to crack formation by measurement of the total crack lengths made by the Vickers indenter. The results revealed several effects: correlation of nanohardness evolution with the level of accumulated damage, radiation-induced hardness increase in grain-boundary region and significant improvement of material resistance to crack formation. This last effect is especially surprising as the typical depth of cracks formed by Vickers indenter in unirradiated material exceeds several tens of micrometers, i.e. is more than hundred times larger than the thickness of the modified layer.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 118-121
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetics and Mechanical Studies of Melaminium bis(trichloroacetate) dihydrate
    Autorzy:
    Kanagathara, N.
    Marchewka, M.
    Gunasekaran, S.
    Anbalagan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205304.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.20.Pm
    65.40.-b
    82.20.-w
    62.20.Qp
    83.50.-v
    Opis:
    The thermal decomposition kinetics of melaminium bis(trichloroacetate) dihydrate (MTCA) has been studied by thermogravimetry and derivative thermogravimetry techniques using non-isothermal experiments at three different heating rates 10, 15, and 20°C $\text{min}^{-1}$. Non-isothermal studies of MTCA revealed that the decomposition occurs in three stages involving dehydration and decomposition. The apparent activation energy $(E_{a})$ and the pre-exponential factor (ln A) of each stage of thermal decomposition at various linear heating rates are calculated using Flynn-Wall, Friedman, Kissinger, and Kim-Park method. A significant variation of effective activation energy $(E_{a})$ with conversion $(α)$ indicates that the process is kinetically complex. The linear relationship between the A and $E_{a}$ values is well established (compensation effect). Isothermal kinetics of thermal decomposition of MTCA was found to obey Avrami-Erofeev's (A4) and power law (P3) equations. In addition to the above, mechanical properties have been estimated by Vicker's microhardness test for the grown crystal.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 3; 827-832
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Impulse Shot Peening Parameters on Properties of Stainless Steel Surface
    Autorzy:
    Wiertel, M.
    Zaleski, K.
    Gorgol, M.
    Skoczylas, A.
    Zaleski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033967.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.65.-b
    81.20.Wk
    62.20.Qp
    61.72.-y
    78.70.Bj
    Opis:
    Shot peening was applied to austenitic stainless steel 1.4541 (EN). The surface treatment was performed at various impact energies E, impact densities j and ball diameters D. This resulted in improved microhardness, which increases monotonically with the increase of E, j and 1/D. However, its changes with E and j achieve saturation at about 400 HV0.1. On the contrary, no saturation is observed in the investigated range for 1/D. In the un-shot peened 1.4541 (EN) steel, the lifetime component of low intensity was found with use of positron annihilation lifetime spectroscopy (PALS). It corresponds to positron annihilation from delocalized state of positrons in bulk. In the shot peened samples the bulk component is no longer observed. Instead, two types of defects can be identified: vacancy-like defects coupled with edge dislocations and vacancies or their small clusters (consisting 3÷5 vacancies). The results of PALS and hardness testing do not correspond very well, especially in the case of the samples shot peened with balls of varying diameters. The most probable reason for this are different depth profiles of both methods. It seems that the defects, which are responsible for the increase of static microhardness above 400 HV0.1 are located mostly below the surface layer penetrated by positrons.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1611-1615
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Glass and Glass-Ceramics Produced from Fly Ash and Boron Waste
    Autorzy:
    Ercenk, E.
    Sen, U.
    Bayrak, G.
    Yilmaz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1181592.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Fs
    64.70.P-
    61.05.cp
    81.70.Pg
    62.20.Qp
    Opis:
    In the current study, the effect of boron waste addition on some properties of fly ash based glass and glass-ceramics were investigated. The powder compositions including 10, 30, and 50 wt% boron waste was prepared. All the investigated compositions were melted at 1500C by using electrical furnaces. Melting structures were cast into the graphite mold. Thus, fly ash-boron waste based glass materials were produced. To transform the glass-ceramic, crystallization process was performed. Crystallization and glass-transition temperatures were determined by differential thermal analysis. Highly dense and crystalline materials, predominantly composed of diopside and augite together with tincalconite and residual glassy phase, were detected by X-ray diffraction analysis after heat treatment at 800, 900, and 1000C for 1 h. For the glass and glass-ceramic samples, mechanical tests such as hardness and fracture toughness were realized. A boron waste addition has a positive effect on the hardness of the specimens unlike the fracture toughness results. Furthermore, produced glass-ceramic materials were characterized via scanning electron microscopy.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 626-628
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nitriding of 4140 Annealed Low Alloy Steel in RF Plasma
    Autorzy:
    de la Piedad-Beneitez, A.
    Muñoz-Castro, A.
    Valencia-Alvarado, R.
    López-Callejas, R.
    Mercado-Cabrera, A.
    Peña-Eguiluz, R.
    Rodriguez-Mendez, B.
    Barocio, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400469.pdf
    Data publikacji:
    2013-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.77.Dq
    52.80.Pi
    62.20.Qp
    81.40.Pq
    81.70.Cv
    Opis:
    The annealed low alloy 4140 steel samples have been nitrided for different treatment periods (1-6 h) in an RF inductive plasma discharge with very low bias voltage ( ≈ 400 V). The resulting nitrided layer has been observed by means of an optical microscope whereas the nitride phases have been characterised by X-ray analysis. The corrosion response, assessed by the potentiodynamic tests in the 3.5% NaCl solution, presents both higher noble potential values and lower corrosion rates when compared with the untreated sample. The Vickers microhardness tests values show an appreciable increment compared to that of the untreated sample. The process is characterized by a high overall efficiency because similar average Vickers tests values were obtained, no matter for how long the treatment was extended. Likewise, the scanning electron micrographs confirmed no appreciable size evolution of the compound layer microstructure at different times of treatment.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 5; 904-906
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field Assisted Sintering Technique Compaction of Ultrafine-Grained Binderless WC Hard Metals
    Autorzy:
    Dopita, M.
    Salomon, A.
    Chmelik, D.
    Reichelt, B.
    Rafaja, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419115.pdf
    Data publikacji:
    2012-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Je
    81.05.Mh
    81.07.-b
    81.20.-n
    81.20.Ev
    62.20.Qp
    62.20.mm
    Opis:
    Tungsten carbide (WC) powder having a crystallite size around 55 nm and the Brunauer-Emmett-Teller specific surface area 2.75 $m^2//g$ was sintered using the field assisted sintering/spark plasma sintering technique. Sintered samples were investigated using different analytical methods providing detailed information on the microstructure and mechanical properties of materials. Density and porosity of specimens were determined using the Archimedes principle and optical and scanning electron micrographs. The X-ray diffraction investigations provided the information on the crystal real structure and crystallite sizes. The electron backscatter diffraction measurements yielded the details about the grain size, frequency, and distributions of grain boundaries. Finally, the essential mechanical properties of sintered samples were obtained from the hardness and fracture toughness measurements. The influences of individual sintering conditions: sintering temperature and sintering time especially, on the microstructure and mechanical properties of sintered specimens were derived. Fully compact samples having the Vickers hardness HV10 around 29 GPa and fracture toughness $K_{Ic}$ approximately 7.2 MPa $m^{1//2}$ were sintered from temperatures of 1800C and holding times 1 min. Specimens sintered at lower temperatures showed lower density which resulted in a significant drop in the sample hardness.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 3; 639-642
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of Spin-Dependent Mechanical Friction at Atomic Level
    Autorzy:
    Gzik-Szumiata, M.
    Szumiata, T.
    Morozow, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030428.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Qp
    46.55.+d
    75.30.Et
    71.70.Gm
    75.50.Bb
    75.45.+j
    Opis:
    In this work a simple 2D model of pseudostatic friction at atomic level has been prepared, in the frame of which both Lennard-Jones potential and spin-dependent term of exchange interaction has been included. As an example, it has been demonstrated, that for iron both average lateral and normal forces between atoms of "base" and "slider" in the tribological node are altered through the change of relative direction of spins, by over a dozen of percent, when the interatomic distance is comparable to the lattice constant. Spin-dependent correction of atomic-level friction coefficient has been estimated.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 713-715
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aluminium Morphological Modification by Nitrogen-Argon Mixture PIII
    Autorzy:
    Muñoz-Castro, A.
    López-Callejas, R.
    Valencia Alvarado, R.
    Peña-Eguiluz, R.
    Mercado-Cabrera, A.
    Barocio, S.
    Rodríguez-Méndez, B.
    de la Piedad-Beneitez, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1504099.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.40.Hf
    52.77.Dq
    81.65.-b
    61.05.cp
    62.20.Qp
    68.37.Hk
    Opis:
    With incident fluences of ≈ $10^{12}$ atoms/$cm^2$ aluminium samples have been plasma immersion ion implanted with either pure nitrogen or argon/nitrogen mixtures at temperatures around 450°C. X-ray diffraction studies have validated the formation of the cubic phase of AlN, in samples treated with both the gas mixtures and pure nitrogen. Likewise, the presence of the hexagonal phase of AlN has been detected when either pure nitrogen or a 70%N/30%Ar mixture have been used. The signature peak of AlN has also been confirmed by the Raman spectroscopy. The maximal microhardness values were found in samples treated with the mixture. The maximal roughness was achieved with the equal part mixture in all cases, although increasing with the implantation pulse width up to a 300 nm peak at 150 μs. The latter critical value remains invariant under the pure nitrogen plasma treatment, provided that implantation periods in the order of 4.5 h are carried out.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 167-170
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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