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    Wyświetlanie 1-3 z 3
    Tytuł:
    Thermal Degradation Behavior of Ag Nanowire-Coated Transparent Conductive Film
    Autorzy:
    Kim, Jae-Yeon
    Kim, Hye-Young
    Kim, Hyun-Su
    Yoo, Ki-Tae
    Yang, Won-Jon
    Byeon, Jai-Won
    Powiązania:
    https://bibliotekanauki.pl/articles/354224.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silver nanowire
    isothermal degradation
    electrical resistance
    overcoating
    Opis:
    For the reliable applications of silver nanowires, AgNW, which is used as a conductive transparent film in electronic devices, the isothermal degradation behaviors of AgNW films with and without overcoating were investigated. Accelerated isothermal degradation was performed as a function of temperature, time, and atmosphere. Electrical resistance and optical transmittance were measured and correlated with the microstructural damages, such as formation of oxide particles and fragmentations of AgNW, which were quantitatively determined from the scanning electron micrographs. The overcoating retarded the formation of oxide particles and subsequent fragmentations as well as resulting degradation in electrical resistance without affecting the optical transmittance.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 913-916
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Process Variables on Friction Stirred Microstructure and Surface Hardness of AZ31 Magnesium Alloy
    Autorzy:
    Kim, Jae-Yeon
    Hwang, Jung-Woo
    Lee, Seung-Mi
    Hyun, Chang-Young
    Park, Ik-Keun
    Byeon, Jai-Won
    Powiązania:
    https://bibliotekanauki.pl/articles/355106.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    friction stir process
    AZ31 alloy
    diamond particle
    process variable
    grain size
    Opis:
    Effects of various friction stir processing (FSP) variables on the microstructural evolution and microhardness of the AZ31 magnesium alloy were investigated. The processing variables include rotational and travelling speed of the tool, kind of secondphase (i.e., diamond, Al2 O3 , and ZrO2 ) and groove depth (i.e., volume fraction of second phase). Grain size, distribution of second phase particle, grain texture, and microhardness were analyzed as a function of the FSP process variables. The FSPed AZ31 com-posites fabricated with a high heat input condition showed the better dispersion of particle without macro defect. For all composite specimens, the grain size decreased and the microhardness increased regardless of the grooved depth compared with that of the FSPed AZ31 without strengthening particle, respectively. For the AZ31/diamond composite having a grain size of about 1 μm, microhardness (i.e., about 108 Hv) was about two times higher than that of the matrix alloy (i.e., about 52 Hv). The effect of second phase particle on retardation of grain growth and resulting hardness increase was discussed.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 907-911
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of Weldability of Hot-Dip Galvanized Steel by Anti-Galvanizing Coating with Si-Fe-Al Oxide-Based Micropowder
    Autorzy:
    So, Seong-Min
    Kim, Ki-Yeon
    Park, Il-Song
    Lee, Seok-Jae
    Yoo, Dong-Jin
    Kim, Yeon-Won
    Oh, Min-Suk
    Powiązania:
    https://bibliotekanauki.pl/articles/2203718.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hot-dip galvanizing
    anti-galvanizing
    oxide micropowder
    weldability
    Opis:
    A Si-Fe-Al ternary oxide-based micropowder coating was used to prevent the formation of a Zn coating on steel during the hot-dip Zn galvanizing process to reduce the welding fume and defects generated during the welding of Zn-galvanized steel. The composition ratio of the oxide powder was optimized and its microstructure and weldability were evaluated. The optimized oxide coating was stable in the hot-dip galvanizing bath at 470°C and effectively inhibited the formation of Zn coating. The Zn residue could be easily removed with simple mechanical impact. The proposed coating reduced Zn fume and prevented the residual Zn from melting in the weld bead during high-temperature welding, thus reducing the number of welding defects. The results indicated that this pretreatment can simplify the manufacturing process and shorten the process time cost-effectively.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 155--159
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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