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    Wyświetlanie 1-4 z 4
    Tytuł:
    Effect of Structure on Physicomechanical Properties of Transition Metals Diboride Films
    Autorzy:
    Goncharov, A.
    Yunda, A.
    Komsta, H.
    Rogalski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033745.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    transition metal diborides
    nanocomposite coating
    magnetron sputtering
    structural state
    hardness
    elastic modulus
    Opis:
    Research of the effect of structure on composition and physicomechanical properties of transition metals diboride films deposited by RF-magnetron sputtering was carried out. It was shown that there is a wide range of different structures, from amorphous to nanocrystalline one with 1-40 nm nanocrystallite sizes in the case of transition metals diboride films. The correlation between the structure, composition, and physicomechanical properties of transition metals diboride films was established.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 270-273
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Advanced multi-functional coatings for vibration control of machining
    Autorzy:
    Rashid, Masud-U
    Guo, Shuai
    Adane, Tigist Fetene
    Nicolescu, Cornel Mihai
    Powiązania:
    https://bibliotekanauki.pl/articles/99791.pdf
    Data publikacji:
    2020
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    vibration damping
    nanocomposite
    damping coating
    friction
    cutting process
    Opis:
    The paper present theoretical and experimental studies of the energy dissipation performance of a composite structure composed in a multilayer nano-composite damping coating applied on a tungsten carbide shim and placed beneath the cutting insert. The coated shim placed closed to the cutting zone is subjected to high compressive and shear stresses as well as high temperature. Therefore, apart from high damping capacity it requires high stiffness and high thermal resistance. The coated shim dissipates the high frequency oscillations produced at the tool-chip and tool-workpiece interfaces during the chip forming process. The use of coated shims demonstrates that the tool life is considerably extended, while the machined surface integrity is improved. The Reuss model of the composite structure composed of a phase with a stiff, low loss factor and a phase with high loss factor is used to calculate the optimal coating thickness that gives high loss factor combined with high stiffness. The synthesis process of the coating material using HiPIMS process is discussed. The physical characteristics of the coating and the machining performance are presented in the experimental section.
    Źródło:
    Journal of Machine Engineering; 2020, 20, 1; 5-23
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanostructured wear-resistant coatings based on refractory metals nitrides: physical-mechanical propertiesand structural-phase state
    Autorzy:
    Panda, Anton
    Dyadyura, Konstiantyn
    Hovorun, Tatyana
    Pylypenko, Oleksandr
    Dunaeva, Marina
    Pandová, Iveta
    Powiązania:
    https://bibliotekanauki.pl/articles/407251.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nanocomposite coatings
    friction
    wear
    hardness
    multilayered TiN/ZrN coating
    Opis:
    Results of scientific researches show the trend of active using nitrides and borides of transition metals and their combination in developing protective materials. While single elements nitrides have been well studied, their multilayer modifications and combinations require more detailed study. Physical-mechanical properties and structural-phase state of multilayer coating according to the deposition conditions is an important task for the study. It will be the analysis of physical-mechanical and electrical properties of coatings based on refractory metals nitrides, their structure and phase composition and surface morphology depending on the parameters of condensation. It was established the structure and behavior of nano scale coatings based on refractory metals nitrides (Ti, Zr) depending on the size of nano grains, texture, stress occurring in coatings.
    Źródło:
    Management and Production Engineering Review; 2019, 10, 4; 133-139
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The analysis of surface morphology, band gaps and optical properties of PAN/GO thin films
    Autorzy:
    Matysiak, W.
    Adamczyk, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818502.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    nanomaterials
    spin coating
    nanocomposite
    polyacrylonitrile
    graphene oxide
    band gaps
    nanomateriały
    powłoka typu spin
    nanokompozyt
    poliakrylonitryl
    tlenek grafenu
    Opis:
    Purpose: PAN/GO nanocomposites are gaining more and more interest from research and industrial environments. According to theoretical studies and experimental tests, PAN/ GO exhibits excellent properties such as tensile strength, good thermal and electrical conductivity, excellent thermal and tribological properties. Thanks to this property, the composite is considered the ideal successor to the nanocomposites used so far. The PAN/GO nanocomposite has great potential in the filtration, automotive, electrical and photovoltaic industry. Design/methodology/approach: The spin-coating process is used to produce thin layers by centrifuging a liquid substance on flat surfaces. The advantages of the spin- coating process are simplicity and ease with which the process can be carried out. Due to the ability to high spin speeds, high airflow leads to fast drying time, which in turn results in high consistency in both macroscopic and nanometre scales. The spin-coting method is usually the starting point and reference point for most academic and industrial processes that require a thin and uniform coating. The use of spin coating has a wide spectrum. This technique can be used to coat small substrates (from a few square mm) up to the coating of flat displays, e.g. TV sets, which may have a meter or more in diameter. Findings: Among the existing methods for producing thin layers, including physical and chemical methods for gas phase deposition or the self-assembly process, the spin-coating process makes it possible to produce uniform thin nanocomposite layers in an easy and cheap way. Spin coating is usually the starting point and reference point for most academic and industrial processes that require a thin and uniform coating. The advantage of the method is the wide spectrum of use. It is used for coating substrates with everything from photoresists, insulators, organic semiconductors, synthetic metals, nanomaterials, metal precursors and metal oxides, transparent conductive oxides and many other materials. Often, spin coating is used to unravel polymer layers or photoresist on semiconductor substrates. Research limitations/implications: Due to the ongoing research on the potential applications of PAN/GO thin layers, including electronics, automotive and photovoltaics, it is worth trying to optimize the parameters of the spin-coiling process such as rotational speed or duration of the process. It is also worth trying to optimize the concentration of GO in the nanocomposite. Practical implications: Despite mixing the solution with an ultrasonic homogenizer to disperse the nanoparticles, the particles dispersed to form a rough surface. Originality/value: Low-cost, easy to carry out method of producing thin nanocomposite layers, having significant application in laboratory environments.
    Źródło:
    Archives of Materials Science and Engineering; 2020, 101, 2; 49--56
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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