Wszystkie pola: glasses - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Phase Transition and Plasticity Enhancement of Ti-Cu-Based Bulk Metallic Glasses
Autorzy:: Wang, L.
Wang, X.
Zhang, G.
Sun, X.
Powiązania:: https://bibliotekanauki.pl/articles/356824.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: bulk metallic glasses
phase transition
annealing
stability
plasticity
Opis:: In this paper, we report the complex crystallization kinetics of phase transition happening in Ti-Cu-based bulk metallic glasses (BMGs), which play significant roles in the glass formation with respect to their low reduced glass transition temperatures, T_rg. The first exothermic event just occurs when annealing the BMG samples in the supercooled liquid region, leading to the Avrami exponent deviating from conventional modes affected by the residual amorphous phase. For Ti₄₃Cu₄₃Ni₇Zr₇ BMG, the plasticity can be improved by pre-annealing at a sub-T_g temperature of 623K (≈50K below T_g) for 0.5 hour, however, deteriorated by 1 hour annealing, which could be related to the change in stability of this BMG against crystallization with different pre-annealing times.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 1; 387-391
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Zr Purity and Oxygen Content on the Structure and Mechanical Properties of Melt-Spun and Suction-Cast Cu46Zr42Al7Y5 Alloy
Autorzy:: Kozieł, T.
Latuch, J.
Cios, G.
Bała, P.
Powiązania:: https://bibliotekanauki.pl/articles/352353.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: metallic glasses
bulk metallic glasses
melt spinning
suction casting
Opis:: The effect of oxygen content in zirconium on the structure and mechanical properties of the Cu₄₆Zr₄₂Al₇Y₅ alloy, in the form of melt-spun ribbons and suction-cast rods, was investigated. Two types of Zr, rod and crystal bar of different nominal purities and oxygen contents, were used to synthesize the alloy by arc melting. Rapidly solidified ribbons were produced by melt spinning and their amorphous structures were confirmed by X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). Bulk samples in the form of rods were cast using a special water-cooled suction casting unit attached to the arc melting system. XRD and DSC studies proved the amorphous structure of the bulk alloy synthesized from low-oxygen Zr and partial crystallization of the same alloy for high-oxygen Zr. In both bulk samples, uniformly distributed crystalline particles were identified as yttrium oxides. Higher mean compressive strength of amorphous alloy was observed. The hardness of amorphous phase was close to 500 HV1 in both bulk alloys, while the hardness of crystalline dendritic areas, observed in the alloy synthesized from high oxygen Zr, was lower by about 50 HV1.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2B; 1215-1219
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Corrosion of Biocompatible Mg66+xZn30-xCa4 (x=0.2) Bulk Metallic Glasses
Autorzy:: Nowosielski, R.
Cesarz-Andraczke, K.
Sakiewicz, P.
Maciej, A.
Jakóbik-Kolon, A.
Babilas, R.
Powiązania:: https://bibliotekanauki.pl/articles/356929.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Mg-based alloys
bulk metallic glasses
amorphous structure
corrosion properties
biodegradable metallic alloys
corrosion products
Opis:: The aim of this paper was to investigate the corrosion resistance of Mg₆₆Zn₃₀Ca₄ and Mg₆₈Zn₂₈Ca₄ metallic glasses and evaluate the ability of this amorphous alloy use for medical applications as biodegradable medical implants. Taking into account the amount of Mg, Zn, Ca elements dissolved in multielectrolyte physiological fluid (MPF) from Mg₆₆+xZn₃₀-xCa₄ (x=0.2) alloys the daily dose of evolved ions from alloys components was determined. Additional goal of the paper was determination of corrosion rate (Vcorr) and amount of hydrogen evolved from amorphous magnesium alloys in simulated environment of human body fluids during 24h immersion and during electrochemical tests. Corrosion studies were done in the multielectrolyte physiological fluid (MPF) at 37°C. The amount of hydrogen evolved [ml/cm²] and corrosion rate Vcorr [mm/year] of amorphous Mg₆₆Zn₃₀Ca₄ and Mg₆₈Zn₂₈Ca₄ alloys were compared. The work also presents characterization of Mg-based bulk metallic glasses structure in the form of 2 mm thickness plates. Samples structure was analyzed by means of X-ray diffraction. Fracture and surface morphology of magnesium alloy samples were identified using scanning electron microscopy.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2A; 807-810
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Structure and Properties of Mg-Cu-(Y,Ca) Bulk Metallic Glasses
Struktura i własności masywnych szkieł metalicznych Mg-Cu-(Y,Ca)
Autorzy:: Babilas, R.
Cesarz-Andraczke, K.
Nowosielski, R.
Powiązania:: https://bibliotekanauki.pl/articles/355924.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Mg-based alloys
bulk metallic glasses
thermal analysis
fracture analysis
mechanical properties
masywne szkła metaliczne
związki magnezu
analiza termiczna
analiza pękania
właściwości mechaniczne
Opis:: The work presents preparation methods, structure characterization and mechanical properties analysis of Mg-based bulk metallic glasses in as-cast state and after crystallization process. The studies were performed on Mg₆₀Cu₃₀Y₁₀ and Mg₃₇Cu₃₆Ca₂₇ glassy alloys in the form of plates and rods. The X-ray diffraction investigations revealed that the tested samples with different thicknesses and shapes were amorphous. The characteristics of the fractured surfaces showed mixed fractures with the “river” and “mirror” patterns, which are characteristic for the glassy materials and some “smooth” areas. The samples of Mg₃₇Cu₃₆Ca₂₇ alloy presented a two-stage crystallization process, but addition of Y caused a single stage crystallization behavior. Qualitative phase analysis from the X-ray data of examined alloys annealed at 473 K enabled the identification of Mg, Mg₂Cu, Cu₂Mg and CaCu crystalline phases. The changes of compressive strength as a function of annealing temperature for studied rods were stated. The best mechanical properties including microhardness and compressive strength were obtained for the alloy with the addition of Y in as-cast state.
W pracy przedstawiono wyniki badań struktury i wybranych własności masywnych szkieł metalicznych na osnowie magnezu. Badania przeprowadzono na próbkach w stanie wyjściowym oraz po procesie wygrzewania. Do badań wybrano dwa trójskładnikowe stopy magnezu z dodatkiem itru lub wapnia o następującym składzie chemicznym:Mg₆₀Cu₃₀Y₁₀ oraz Mg₃₇Cu₃₆Ca₂₇. Badania rentgenowskie potwierdziły, że analizowane próbki w postaci płytek i prętów posiadają strukturę amorficzną. Obserwacje mikroskopowe wybranych obszarów powierzchni przełomów płytek i prętów pozwoliły na wyodrębnienie stref o morfologii przełomów „gładkich” i „łuskowych”. Analiza procesu krystalizacji wykazała występowanie pojedynczego etapu krystalizacji dla szkła metalicznego Mg₆₀Cu₃₀Y₁₀ związanego z wydzielaniem się fazy Mg₂Cu oraz dwuetapowego procesu krystalizacji dla stopu Mg₃₇Cu₃₆Ca₂₇, w którym zidentyfikowano fazę Cu₂Mg i CaCu. Największą wytrzymałość na ściskanie oraz mikrotwardość uzyskano dla próbek szkła metalicznego z dodatkiem itru w stanie bezpośrednio po odlaniu.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 4; 2645-2650
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Structure and Chosen Nanomechanical Properties of Amorphous-Crystalline Laser Weld
Autorzy:: Pilarczyk, W.
Kania, A.
Babilas, R.
Pilarczyk, A.
Powiązania:: https://bibliotekanauki.pl/articles/1029767.pdf
Data publikacji:: 2018-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: bulk metallic glasses
nanoindenter
surface topography
nanomechanical properties
Opis:: Zr-based bulk metallic glasses attract the attention because of their good mechanical properties and glass-forming ability. A laser welding process has been applied to increase the capability of using amorphous materials in the industry. The plates of Zr₅₅Al₁₀Ni₅Cu₃₀ alloy were produced by die pressure casting method and welded by the TruLaser Station 5004. X-ray analysis and microscopic observation provided information about the structure and morphology of the cross-section of weld on the boundary of the heat affected zone and the fusion zone. Nanohardness and reduced Young modulus of the particular heat affected zone, fusion zone, and parent material were examined with Hysitron TI950 Triboindenter and with the Berkovich indenter. The presence of the amorphous and amorphous-crystalline phases was confirmed by related tests. The detailed topographic analysis revealed that the heat affected zone demonstrated a slight roughness characteristic of the crystalline phase and a smooth surface in the fusion zone. The main value of the nanohardness of particular weld zones has the similar order of magnitude. In turn, Er value is restricted in the range of 105.76-108.80 GPa. The main goal of this work is to present the structure and chosen nanomechanical properties of the Zr₅₅Cu₃₀Ni₅Al₁₀ laser weld.
Źródło:: Acta Physica Polonica A; 2018, 133, 2; 219-221
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Amorphous materials in the production of new implants
Autorzy:: Kiljan, A.
Liptakova, T.
Powiązania:: https://bibliotekanauki.pl/articles/111625.pdf
Data publikacji:: 2018
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:: amorphous materials
magnesium
bulk metallic glasses
implants
corrosion tests
materiały amorficzne
magnez
implant
testy korozyjne
szkła metalowe
Opis:: Amorphous materials based on magnesium are new materials for potential biomedical application, especially for new implants, as they bear resemblance to titanium implants. Mg₆₆Zn₃₀Ca₄ alloy has specific properties, especially mechanical and corrosive, therefore, it has biomedical application as its properties are better than that of other materials. The following paper describes amorphous alloy based on magnesium, properties and shows how to produce amorphous samples of Mg₆₆Zn₃₀Ca₄.
Źródło:: Production Engineering Archives; 2018, 18; 50-53
2353-5156
2353-7779
Pojawia się w:: Production Engineering Archives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Isothermal Stability and Selected Mechanical Properties of Zr48Cu36Al8Ag8 Bulk Metallic Glass
Autorzy:: Błyskun, P.
Latuch, J.
Kulik, T.
Powiązania:: https://bibliotekanauki.pl/articles/353937.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: bulk metallic glasses
isothermal stability
mechanical properties
TTT curve
Opis:: The aim of this work was to investigate the influence of isothermal annealing on the amorphous structure stability of the Zr₄₈ Cu₃₆ Al₈ Ag₈ alloy. A series of continuous heating examinations was performed on the differential scanning calorimeter in order to determine the temperature limits for isothermal annealing series where the time to crystallization was measured. The obtained results were calculated and a time-temperature-transformation diagram was created and discussed. Static compression test as well as microhardness measurements of the as-quenched samples gave a mechanical properties results supplement. The measured properties (σ_c = 1800 MPa and 614 HV0.05) are comparable to the literature results for this alloy. Fractographic observations with the scanning electron microscope were also performed in order to prove some plasticity observed during the strength tests.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 3; 1749-1753
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Structure and properties of suction-cast Pr-(Fe, Co)-(Zr, Nb)-B rod magnets
Autorzy:: Pawlik, Katarzyna
Powiązania:: https://bibliotekanauki.pl/articles/2086840.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: bulk metallic glasses
bulk nanostructured magnets
RE-Fe-B magnets
miniature magnet
szkło metaliczne masywne
magnes nanostrukturalny
magnes RE-Fe-B
magnes miniaturowy
Opis:: The rod specimens were produced from Pr9Fe50 + xCo13Zr1Nb4B23 – x (x = 0, 5, 8) alloys using the suction-casting technique. Subsequent devitrification annealing of those samples resulted in the change of their phase structure and magnetic properties. For annealed specimens of all investigated compositions, the Rietveld analyses of X-ray diffractions have shown the presence of three crystalline phases: the hard magnetic Pr2Fe11.2Co2.8B, soft magnetic α-Fe, and paramagnetic Pr1 + xFe4B4, which have precipitated within the amorphous matrix. This technique allowed us to determine the weight fractions of constituent phases. Furthermore, the microstructural changes with the alloy composition were observed. Magnetic measurements of annealed rods allowed us to calculate the switching field distributions (SFD) and δM plots in order to determine the strength and character of magnetic interactions between grains of constituent phases.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 5; e138971, 1--7
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Effect of Cooling Rate on Mechanical Properties of New Multicomponent Fe-Based Amorphous Alloy During Annealing Process
Autorzy:: Rezaei-Shahreza, Parisa
Redaei, Hossein
Moosavi, Parisa
Hasani, Saeed
Seifoddini, Amir
Jeż, Bartłomiej
Nabiałek, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/2048746.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: bulk metallic glasses
BMGs
nanocomposite
mechanical testing
fracture toughness
Opis:: Fe-based bulk metallic glasses (BMGs) have been extensively investigated due to their ultrahigh strength and elastic moduli as well as desire magnetic properties. However, these BMGs have few applications in industrial productions because of their brittleness at room temperature. This study is focused on the effect of cooling rate on the mechanical properties (especially toughness) in the Fe41Co7Cr15Mo14Y2C15B6 BMG. For this aim, two samples with the mentioned composition were fabricated in a water-cooled copper mold with a diameter of 2 mm, and in a graphite mold with a diameter of 3 mm. The formation of crystalline phases of Fe23(B,C)6, α-Fe and Mo3Co3C based on XRD patterns was observed after the partial crystallization process. To determine the toughness of the as-cast and annealed samples, the indentation technique was used. These results revealed that the maximum hardness and toughness were depicted in the sample casted in the water-cooled copper mold and annealed up to 928°C. The reason of it can be attributed to the formation of crystalline clusters in the amorphous matrix of the samples casted in the graphite mold, so that this decrease in the cooling rate causes to changing the chemical composition of the amorphous matrix.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 1; 251-254
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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