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Wyszukujesz frazę "Matus, K." wg kryterium: Autor

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    Wyświetlanie 1-11 z 11
    Tytuł:
    Phase identification of nanometric precipitates in AlSi9Cu alloy after remelting by laser beam
    Autorzy:
    Pawlyta, M.
    Labisz, K.
    Matus, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1113264.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.Nq
    81.30.Mh
    68.37.Ma
    Opis:
    The aim of presented paper is an investigation of the structure changes in AlSi9Cu alloy after remelting by a laser beam. Scanning transmission electron microscopy was applied for structure characterization and precipitates phase identification. In the raw material, precipitates were larger and during remelting such precipitates were dissolved and very fast crystallization came next. Observed precipitates are generally uniform: in size, shape, and chemical composition. Generally, after remelting precipitates are not uniformly distributed in the whole sample but areas with dense, nanometric precipitates are common. Numerous volumes with elongated Ti precipitates, identified as Ti(Al_{1-x}Si_{x})₃, were found. Observed precipitate can strongly affect material properties (even in a case of law Ti concentration) because it may act as a crystal nucleus for other phases.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 827-829
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase identification of nanometric precipitates in Al-Si-Cu aluminum alloy by HR-STEM investigations
    Autorzy:
    Pawlyta, M.
    Labisz, K.
    Matus, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/351894.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    phase identification
    precipitates
    STEM- HAADF
    Opis:
    Aluminium recycling is cost-effective and beneficial for the environment. It is expected that this trend will continue in the future, and even will steadily increase. The consequence of the use of recycled materials is variable and difficult to predict chemical composition. This causes a significant reduction in the production process, since the properties of produced alloy are determined by the inicrostructure and the presence of precipitates of other phases. For this reason, the type and order of formation of precipitates were systematically investigated in recent decades. These studies involved, however, only the main systems (Al-Cu. Al-Mg-Si, Al-Cu-Mg, Al-Mg-Si-Cu), while more complex systems were not analysed. Even trace amounts of additional elements can significantly affect the alloy inicrostructure and composition of precipitates formed. This fact is particularly important in the case of new technologies such as laser surface treatment. As a result of extremely high temperature and temperature changes after the laser remelting large amount of precipitates are observed. Precipitates are nanometric in size and have different morphology and chemical composition. A full understanding of the processes that occur during the laser remelting requires their precise but also time effectively phase identification, which due to the diversity and nanometric size, is a major research challenge. This work presents the methodology of identification of nanometer phase precipitates in the alloy AlSi9Cu, based on the simultaneous TEM imaging and chemical composition analysis using the dispersion spectroscopy using the characteristic X-ray. Verification is performed by comparing the simulation unit cell of the identified phase with the experimental high-resolution image.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1303-1308
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of CeO₂, ZrO₂, and CeZrO₂ crystals on CNT
    Autorzy:
    Matus, K.
    Łamacz, A.
    Liszka, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1112435.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.Nq
    81.30.Mh
    68.37.Ma
    61.48.De
    82.45.Jn
    Opis:
    Carbon nanotubes are increasingly being used as a support for catalyst particles. Carbon nanotubes are also used for filtering and reduction, their widespread use due to the high surface area which allows for attachment to the surface of carbon nanotubes a large amount of metallic (Ni, Fe, Pt, etc.) or oxide particles, serving as catalysts. The use of ceria-zirconia mixed oxide deposited on the surface of the nanotubes has not yet been sufficiently examined. Scanning transmission electron microscope with high-angle annular dark-field imaging and high-resolution transmission electron microscopy imaging were used as primary research techniques. Conducted research using high-angle annular dark-field imaging allows determining that catalyst particles have a regular shape which is the best from the standpoint of catalysis. Using a fast Fourier transform: and diffraction pattern has identified the catalyst particles as CeZrO₂.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 966-968
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Morphology and Structure of ZnO Thin Films Deposited by ALD Method
    Autorzy:
    Boryło, P.
    Matus, K.
    Lukaszkowicz, K.
    Gołombek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/352603.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ALD
    ZnO
    SEM
    TEM
    UV/VIS
    Opis:
    This paper presents research results of zinc oxide thin films deposited on a glass substrate with use of ALD method. Our researches focused on analyzing of the influence of ALD deposition process temperature on the morphology and transparency of thin layers. The morphology was examined using both scanning and transmission electron microscopes. Transparency study was performed by UV-VIS spectroscopy. For our experiments, two sets of the coating have been prepared, differing in temperature and number of cycle used during the preparation process. The first set was deposited in 100 cycles, second one in 500 cycles. Each set of tested coating contained samples prepared at different temperatures.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 129-133
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Nanometric-Sized Carbides Formed During Tempering of Carbide-Steel Cermets
    Autorzy:
    Matus, K.
    Pawlyta, M.
    Matula, G.
    Gołombek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/356337.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    carbide-steel cermet
    HRTEM
    STEM
    tempering
    Opis:
    The aim of this article of this paper is to present issues related to characterization of nanometric-sized carbides, nitrides and/or carbonitrides formed during tempering of carbide-steel cermets. Closer examination of those materials is important because of hardness growth of carbide-steel cermet after tempering. The results obtained during research show that the upswing of hardness is significantly higher than for high-speed steels. Another interesting fact is the displacement of secondary hardness effect observed for this material to a higher tempering temperature range. Determined influence of the atmosphere in the sintering process on precipitations formed during tempering of carbide-steel cermets. So far examination of carbidesteel cermet produced by powder injection moulding was carried out mainly in the scanning electron microscope. A proper description of nanosized particles is both important and difficult as achievements of nanoscience and nanotechnology confirm the significant influence of nanocrystalline particles on material properties even if its mass fraction is undetectable by standard methods. The following research studies have been carried out using transmission electron microscopy, mainly selected area electron diffraction and energy dispersive spectroscopy. The obtained results and computer simulations comparison were made.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 747-752
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Nanocrystalline AlTiSiN Coatings Deposited by a LARCCAE Process
    Autorzy:
    Gołombek, K.
    Tomiczek, A. E.
    Pakuła, D.
    Matus, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/351606.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlTiSiN coatings
    LARC-CAE process
    structural examinations
    Opis:
    The paper presents the results of research studies involving the ceramic-metal tool materials with the deposited nitride coatings on the basis of aluminium, titanium and silicon. The cathodic arc evaporation with lateral rotating cathodes method was used for deposition of nanocrystalline, wear resistant nitride coatings – AlTiSiN type. Structural examinations are presented of the applied coatings and their support material made on the scanning electron microscope (SEM) and the scanning/transmission electron microscope (STEM). Chemical composition analysis as a function of the distance from the specimen surface, the so-called profile analysis, were carried out also. The structural analysis confirms that deposited multilayer coatings have dense microstructure without any visible porosity and delamination. It was found that the investigated coatings have nanocrystalline structure and consisting of fine crystallites even less than 6nm. Lattice deformations and numerous structural defects were also observed in the nanolayers. Depositing the AlTiSiN coatings results in the significant hardness increase within the range of 2252 ±256 to 2908 ±295 HV0.01.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 899-906
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbides Analysis of the High Strength and Low Density Fe-Mn-Al-Si Steel
    Autorzy:
    Sozańska-Jędrasik, L.
    Mazurkiewicz, J.
    Borek, W.
    Matus, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/351736.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high manganese steels
    triplex
    microstructure
    isolates of carbide
    carbides κ
    M7C3
    EBSD
    Opis:
    The work presents the results of investigations into the structure and phase composition of newly developed high manganese steels of the X98MnAlSiNbTi24-11 and X105MnAlSi24-11 type. The average density of such steels is 6.67 g/cm3, which is 15% lower as compared to typical structural steels. An analysis of phase composition and structure allows to conclude that the investigated steels feature an austenitic γ-Fe(Mn,Al,C) structure with uniformly distributed and elongated α-Fe(Mn,Al) ferrite grains on the boundaries of austenite grains and carbides. Examinations by diffraction of back scattered electrons (EBSD) allow to conclude that high-angle boundaries dominate in such steels, having significant influence on mechanical properties. Three types of carbides with differentiated chemical composition and size were identified in steel X98MnAlSiNbTi24-11 with scanning and transmission electron microscopy. κ-(Fe,Mn)3AlC carbides, having a regular, face-centered cubic lattice (fcc), were identified in austenite. Transmission electron microscopy examinations have enabled to identify M7C3-type carbide in ferrite. Nb- and Ti-based complex carbides were identified in steel X98MnAlSiNbTi24-11, both, in ferrite and austenite. (NbTi)C2 carbide precipitates were confirmed in an X-ray qualitative phase analysis. The size of the above-mentioned carbides is within several to several dozens of μm. An X-ray qualitative phase analysis has confirmed the precipitates of M7C3 carbides in both steels.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 265-276
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of Multilayer Cu/Ni Systems with Nanometric Layers by Electrolysis Method
    Autorzy:
    Spilka, M.
    Babilas, R.
    Ratuszek, W.
    Kowalska, J.
    Matus, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/353254.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cu/Ni multilayer systems
    galvanic method
    thickness measurement
    surface morphology
    topography
    Opis:
    The paper presents research results of multilayer systems composed of alternate Cu/Ni layers. The layers thickness obtained by the galvanic treatment was determined by using the transmission electron microscopy and X-ray diffraction method in the grazing incidence diffraction geometry. The surface morphology was observed using scanning electron microscope with EDS microanalysis. Observation of the surface topography of systems using the atomic force microscope was also carried out.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 2067-2073
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High resolution TEM investigations and TDA analysis of zinc alloy with strontium addition
    Autorzy:
    Labisz, K.
    Krupiński, M.
    Pawlyta, M.
    Matus, K.
    Kremzer, M.
    Dopierała, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1153727.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Og
    81.70.Pg
    61.66.Dk
    Opis:
    In this paper there are presented results of high resolution transmission electron microscope investigation concerning the structure of the Zn-Al-Si cast zinc alloy with Sr addition for crystal structure refinement after thermo-derivative analysis performed using the universal metallurgical simulator and analyzer platform. The thermo-derivative analysis allows to determine the specific points of the solidifying alloy, which is helpful for phase determination and proper heat treatment condition determination, allowing to reduce the energy costs and obtaining higher mechanical and functional properties. Using transmission electron microscopy, especially selected area diffraction method appliance it was possible to determine the phases occurring in the alloy in the state after chemical composition modification as well as after appliance of very precisely controlled cooling rate. The morphology and size of the microstructure of micro-sized eutectic was possible to determine as well the lattice parameters of the Zn α -phase. Particularly the overview will be also directed on the high resolution transmission electron microscope to achieve good insight into the structural changes on the atomic scale.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 823-826
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Nb and Ti micro-additives and thermo-mechanical treatment of high-manganese steels with aluminium and silicon on their microstructure and mechanical properties
    Autorzy:
    Sozańska-Jędrasik, L.
    Mazurkiewicz, J.
    Borek, W.
    Matus, K.
    Chmiela, B.
    Zubko, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353026.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-manganese steels
    TRIPLEX
    microstructure
    ĸ carbides
    M7C3
    EBSD
    Nb and Ti micro-additives
    grain size
    Opis:
    The results are based on two experimental high-manganese X98MnAlSiNbTi24-11 and X105MnAlSi24-11 steels subjected to thermo-mechanical treatment by hot-rolling on a semi-industrial processing line. The paper presents the results of diffraction and structural studies using scanning and transmission electron microscopy showing the role of Nb and Ti micro-additives in shaping high strength properties of high-manganese austenitic-ferritic steels with complex carbides. The performed investigations of two experimental steels allow to explain how the change cooling conditions after thermo-mechanical treatment of the analysed steels affects the change of their microstructure and mechanical properties. The obtained results allow assessing the impact of both the chemical composition and the applied thermo-mechanical treatment technology on the structural effects of strengthening of the newly developed steels.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 133-142
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in Structure of CuCr0.6 Alloy After Repetitive Corrugation Process
    Autorzy:
    Jung, T.
    Kwaśny, W.
    Rdzawski, Z.
    Głuchowski, W.
    Matus, K.
    Pawlyta, M.
    Szindler, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/356417.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CuCr0.6 alloy
    severe plastic deformation
    repetitive corrugation and straightening
    electron backscatter diffraction
    transmission electron microscopy
    Opis:
    This paper presents the study of repetitive corrugation process influence on the strengthening of annealed alloy. Based on the results of mechanical properties of deformed sample, it has been found that the microhardness, ultimate tensile strength, yield strength and apparent elastic limit are significantly increased in relation to annealed sample. Examination on transmission electron microscopy confirmed the effect of intensive plastic deformation on structure fragmentation in the nanometric scale. This work confirmed the possibility of using the repetitive corrugation process to increase mechanical properties of CuCr0.6 alloy.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2441-2448
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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