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    Wyświetlanie 1-8 z 8
    Tytuł:
    Advanced Materials & Technologies in Precisive Temperature Measurements
    Zaawansowane materiały i technologie w precyzyjnych pomiarach temperatury
    Autorzy:
    Prokhorenko, S.
    Mudry, S.
    Panas, A. J.
    Stadnyk, B
    Kowalczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/154994.pdf
    Data publikacji:
    2006
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    stopy eutektyczne Cd-Sn
    Bi-Cd
    dyfrakcja rentgenowska
    różniczkowa kalorymetria skaningowa
    temperaturowy punkt odniesienia
    obróbka energetyczna
    Cd-Sn
    eutectic melts
    X-ray diffraction
    differential scanning calorymetry
    temperature fix-point
    energetical treatment
    Opis:
    The studies of eutectic melts Cd-Sn, Bi-Cd are carried out be means of X-ray diffraction, metallography and differential scanning calorymetry methods in order to check the possibility to use them as temperature fix-point. It is shown that outside energetic influence on melt can change some parameters of structure and physical properties.
    Stopy eutektyczne Cd-Sn, Bi-Cd badane były metodami dyfrakcji rentgenowskiej, metalografii oraz różniczkowej kalorymetrii skaningowej w celu uzyskania wiedzy o możliwości używania ich jako temperaturowych punktów odniesienia. Wykazano, że zewnętrzna obróbka energetyczna stopów zmienia ich parametry strukturalne i właściwości fizyczne.
    Źródło:
    Pomiary Automatyka Kontrola; 2006, R. 52, nr 12, 12; 4-6
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Liquid-solid interaction during formation of nanocomposite systems
    Autorzy:
    Shtablavyi, I.
    Mudry, S.
    Kajak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/779001.pdf
    Data publikacji:
    2012
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    composite materials
    liquid metals and alloys
    metallic powders
    microstructure
    short-range order
    Opis:
    Structural changes in mixtures of liquid Bi with small Cu and Ni particles were studied at temperatur es of 615 and 1145K. Microstructures of the composites were observed (SEM) and analyzed after treatment at different temperatures and various durations of stirring. The structure of the mixtures of Bi with Cu(Ni) particles was investigated by means of X-ray diffraction, both in the solid and liquid state.
    Źródło:
    Polish Journal of Chemical Technology; 2012, 14, 4; 42-45
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural disordering in Sn-Pb(Bi) eutectic melts induced by heating
    Autorzy:
    Mudry, S.
    Shtablavyi, I.
    Shevernoga, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/779777.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    liquid alloys
    chemical bonding in eutectic alloys
    chemical short-range order
    Opis:
    The structure of liquid Sn0.739Pb0.261 and Sn0.57Bi0.43 eutectic alloys was studied by means of X-ray diffraction at several temperatures. Structure factors, pair correlation functions and the main structural parameters obtained on their basis were analyzed. We show that the structure of the Sn0.739Pb0.261 and Sn0.57Bi0.43 eutectic alloys is inhomogeneous and consists of different types of clusters. Upon heating the cluster structure undergoes topological and chemical disordering showing a significant dependence of structural parameters on temperature near the melting point.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 3; 61-64
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation of temperature field created at pulsed laser irradiation of amorphous Fe73.7Si15.5B7.4Nb2.4Cu1.0 alloy
    Autorzy:
    Nykyruy, Yu.S.
    Mudry, S. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1940710.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska
    Tematy:
    laser irradiation
    temperature distribution
    amorphous materials
    numerical method of finite differences
    Opis:
    The temperature in the laser irradiation area of an amorphous iron-based ribbon was calculated. As a result of the calculation a spatial temperature distribution and its time dependence were structured which allowed reproducing the geometric and structural characteristics of exposed areas. Simultaneously, an irradiated amorphous alloy was investigated by scanning electron microscopy which allowed determining the geometric and structural characteristics of these areas experimentally and obtaining their dependencies on the laser pulse parameters. The results of theoretical calculations were compared with the experimental data.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 1; 75-82
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The structure of clusters in liquid alloys of pseudo-binary PbTe-Bi2Te3 system
    Autorzy:
    Korolyshyn, A. V.
    Olyinyk, Z. M.
    Mudry, S. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/378946.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    metallic alloy
    short-range order
    melt
    thermoelectric material
    stop metaliczny
    uporządkowanie bliskie
    wytop
    materiał termoelektryczny
    Opis:
    Purpose: of this paper is to study the structure of melts of quasi-binary system Bi2Te3-PbTe by means of X-ray diffraction method. The aim of the research was to investigate the short range order in melts comparing it with the structure in solid state. Design/methodology/approach: Analysis of the structural factors, radial distribution functions of atoms and basic structural parameters showed that the structure of melts at temperatures near the liquidus shows microheterogeneity. Findings: On the basis of the analysis of structural factors, functions of the radial distribution of atoms and basic structural parameters, it is shown that in the given concentration the short range order structure of liquid alloys of pseudo-binary PbTe-Bi2Te3 system is microinhomogeneous and is characterized by the presence of associates, whose atomic arrangement is like to the structure of solid compounds, existing in this concentration range. Research limitations/implications: To complete the understanding of short-range order effect on the formation of the physical properties of Pb-Bi-Te alloys, further studies of the thermoelectric properties of these alloys in the liquid state are needed. Practical implications: The promise of the considered direction requires an experimental and theoretical study of the processes of bulk, thin film and nanostructured material. In this case, it is necessary to develop a technology for the synthesis of compounds of Pb-Bi-Te system, obtaining thin films and nanostructures using the vapour phase methods with studying the mechanisms of thermoelectric properties of the material formation and optimization of technological regimes for obtaining effective thermoelectric materials based on compounds of Pb-Te-Bi system. Originality/value: The processes of structure formation of nanosystems with given characteristics are investigated, because among numerous thermoelectric materials, bismuth telluride (Bi2Te3) and its alloys are the most important thermoelectric materials used in state-of-the-art devices near room temperature, and lead telluride (PbTe)-based alloys are extensively used in power supplies for space exploration and generators for use at medium to high temperatures.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 100, 1/2; 5-12
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray diffraction studies of rapid cooled Al-V and Al-Fe-V alloys
    Autorzy:
    Shved, O.
    Mudry, S.
    Girzhon, V.
    Smolyakov, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/368687.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    Al-based alloys
    quasicrystals
    rapid cooling
    microhardness
    stopy na bazie Al
    kwazikryształy
    przyspieszone chłodzenie
    mikrotwardość
    Opis:
    Purpose: of this paper is to deep and more complete knowledge about the features of phase and structure formation in Al-based alloys with transition metals (TM) Fe and V at rapid cooling from melt. It is known, that nonequilibrium synthesis conditions of such alloys lead to quasicrystalline, amorphous or metastable phases formation, which can significantly improve the physical-chemical properties and first of all the mechanical ones. But understanding of compositional dependences of structure features at formation under nonequilibrium conditions and the correlation of these dependences with physical properties of alloys is far to be clear. Design/methodology/approach: Structure of Al-enriched Al-V, Al-V-Fe rapid cooled alloys was studied by X-ray diffraction method. In order to estimate the influence of structural state of alloy on the mechanical properties the integral microhardness was studied by Vickers method. Findings: Two quasicrystalline icosaedral phases with different cell parameters are revealed in ternary alloys Al100-3xV2xFex (x=2-4). Increasing of transition metal content promotes the formation of phase with higher quasicell parameter embedded in amorphous matrix. With increasing of the transition elements total content from 6 up to 12 at. % the microhardness of alloys increased gradually from 867 to 3050 MPa. Research limitations/implications: Research of nonequilibrium alloys revealed crystalline structure of Al-V alloys and quasicrystalline embedded in amorphous matrix of Al-Fe-V ternary alloys. Obtained results suppose that further structure and physical properties studies of Al-Fe-V alloys will allows to find the conditions to control the producing of materials with desired properties. Practical implications: Using of rapid cooling method for synthesis of Al-enriched Al-Fe-V alloys give an opportunity to produce alloys with significantly improved mechanical properties. Originality/value: Nonequilibrium conditions of cooling allow significantly changes the structure and properties.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 96, 1; 5-11
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface diffusion and cluster formation of gold on the silicon (111)
    Autorzy:
    Plechystyy, V.
    Shtablavyi, I.
    Rybacki, K.
    Winczewski, S.
    Mudry, S.
    Rybicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/952460.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    molecular dynamics
    surface diffusion
    clusters
    atomic monolayer
    activation energy
    dynamika molekularna
    dyfuzja powierzchniowa
    klastry
    monowarstwa atomowa
    energia aktywacji
    Opis:
    Purpose: Investigation of the gold atoms behaviour on the surface of silicon by molecular dynamics simulation method. The studies were performed for the case of one, two and four atoms, as well as incomplete and complete filling of gold atoms on the silicon surface. Design/methodology/approach: Investigations were performed by the method of molecular dynamics simulation using the Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS). MEAM potential of interatomic interaction was used for modelling. Molecular dynamic simulations were carried out in isothermal-isobaric ensemble (NpT) with a timestep 1.0 fs. Findings: As a result of studies, the preferred interaction between gold atoms and the formation of clusters at temperatures up to 800 K was revealed. Analysis of the temperature dependences of the number of large jumps of atoms made it possible to calculate the activation energy of a single jump. It was found that activation energy of single atomic displacement decreases with increasing number of gold atoms. Research limitations/implications: Only a limited number of sets of atoms were used in the study. It is possible that for another combination of atoms and a larger substrate surface, the formation of gold nanoislands on the silicon surface can be observed, which requires further research. Practical implications: The research results can be used to select the modes of gold sputtering to create gold nanoislands or nanopillars on the silicon surface. Originality/value: Computer modelling of the behaviour of gold atoms on the surface of silicon with the possibility of their self-organization and cluster formation was performed for the first time.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2020, 101, 2; 49-59
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explosive crystallisation of metal glasses based on Fe-B during pulsed laser heating. Experiment and modelling
    Autorzy:
    Smolyakov, O.V.
    Girzhon, V.V.
    Mudry, S.I.
    Nykyruy, Y.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200617.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    explosion
    crystallisation
    metallic glass
    structure modelling
    eksplozja
    krystalizacja
    szkło metaliczne
    modelowanie struktury
    Opis:
    Purpose: The structure evolution of amorphous metallic alloys during different kinds of thermal effects is an important problem of disordered systems physics. A precise evolutional model would allow predicting the formation of such a structural state, providing the necessary physical and mechanical alloy properties. Design/methodology/approach: The paper is devoted to the problem of modelling the explosive crystallisation process in metal glasses induced by laser, supplemented by experimental results. Findings: A theoretical model of laser-induced explosive crystallisation in metal glasses is proposed. A pulse laser heating method for the surface processing was developed, making it possible to obtain two-layer structures with an adjustable thickness of the amorphous crystalline layer. Research limitations/implications: The proposed model is assumed to test and optimes for metal glasses of other chemical compositions. Practical implications: A theoretical model of laser-induced explosive crystallisation in metal glasses allows for predicting and controlling structure changes to obtain the desired properties. Originality/value: The investigation of structure changes at rapid heating of amorphous alloys by experimental methods is very limited in obtaining data and their interpretation. For that reason, combining the modelling with experimental measurements is proposed. The results of this work have value for a scientist in material science, physics and engineering, which use nonequilibrium physical processes to obtain new materials, including nanoscale systems.
    Źródło:
    Archives of Materials Science and Engineering; 2023, 119, 2; 49--55
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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