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    Wyświetlanie 1-5 z 5
    Tytuł:
    Electrorefining of Indium Metal From Impure In-Sn Alloy in Fluoride Molten Salt
    Autorzy:
    Lee, Hyun-Gyu
    Choi, Sang-Hoon
    Sim, Jae-Jin
    Lim, Jae-Hong
    Hyun, Soong-Keun
    Lee, Jong-Hyeon
    Park, Kyoung-Tae
    Powiązania:
    https://bibliotekanauki.pl/articles/352615.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    indium metal
    molten salt electrolysis
    cyclic voltammetry
    chronopotentiometry
    electrodeposition
    Opis:
    In this study, molten salt electrorefining was used to recover indium metal from In-Sn crude metal sourced from indium tin oxide (ITO) scrap. The electrolyte used was a mixture of eutectic LiF-KF salt and InF3 initiator, melted and operated at 700°C. Voltammetric analysis was performed to optimize InF3 content in the electrolyte, and cyclic voltammetry (CV) was used to de-termine the redox potentials of In metal and the electrolyte. The optimum initiator concentration was 7 wt% of InF3 , at which the diffusion coefficients were saturated. The reduction potential was controlled by applying constant current densities of 5, 10, and 15 mA/cm2 using chronopotentiometry (CP) techniques. In metal from the In-Sn crude melt was deposited on the cathode surface and was collected in an alumina crucible.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 899-905
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of 4N5 Grade Tantalum Wire from Tantalum Scrap by EBM and Drawing
    Autorzy:
    Yu, Ji-Won
    Choi, Sang-Hoon
    Sim, Jae-Jin
    Lim, Jae-Hong
    Seo, Kyoung-Deok
    Hyun, Soong-Keon
    Kim, Tae-Youb
    Gu, Bon-Woo
    Park, Kyoung-Tae
    Powiązania:
    https://bibliotekanauki.pl/articles/353005.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electron beam melting
    drawing
    tantalum scrap
    recycling
    high purity
    Opis:
    Electron beam melting(EBM) is a useful technique to obtain high-purity metal ingots. It is also used for melting refractory metals such as tantalum, which require melting techniques employing a high-energy heat source. Drawing is a method which is used to convert the ingot into a wire shape. The required thickness of the wire is achieved by drawing the ingot from a drawing die with a hole of similar size. This process is used to achieve high purity tantalum springs, which are an essential component of lithography lamp in semiconductor manufacturing process. Moreover, high-purity tantalum is used in other applications such as sputtering targets for semiconductors. Studies related to recycling of tantalum from these components have not been carried outuntil now. The recycling of tantalum is vital for environmental and economic reasons. In order to obtain high-purity tantalum ingot, in this study impurities contained in the scrap were removed by electron beam melting after pre-treatment using aqua regia. The purity of the ingot was then analyzed to be more than 4N5 (99.995%). Subsequently, drawing was performed using the rod melted by electron beam melting. Owing to continuous drawing, the diameter of the tantalum wire decreased to 0.5 mm from 9 mm. The hardness and oxygen concentration of the tantalum ingot were 149 Hv and less than 300 ppm, respectively, whereas the hardness of the tantalum wire was 232.12 Hv. In conclusion, 4N5 grade tantalum wire was successfully fabricated from tantalum scrap by EBM and drawing techniques. Furthermore, procedure to successfully recycle Tantalum from scraps was established.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 935-941
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructural Characterization of U-10wt.%Zr Fuel Slugs Containing Rare-Earth Elements Prepared by Modified Injection Casting
    Autorzy:
    Lee, Sang-Hun
    Kim, Ki-Hwan
    Kuk, Seoung-Woo
    Park, Jeong-Yong
    Choi, Ji-Hoon
    Powiązania:
    https://bibliotekanauki.pl/articles/355802.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    U-Zr
    rare-earth element
    microstructure
    injection casting
    sodium-cooled fast reactor
    SFR
    Opis:
    U-10wt.%Zr metallic fuel slugs containing rare-earth (RE: a rare-earth alloy comprising 53% Nd, 25% Ce, 16% Pr and 6% La) elements for a sodium-cooled fast reactor were fabricated by modified injection casting as an alternative method. The distribution, size and composition of the RE inclusions in the metallic fuel slugs were investigated according to the content of the RE inclusions. There were no observed casting defects, such as shrunk pipes, micro-shrinkage or hot tears formed during solidification, in the metallic fuel slugs fabricated by modified injection casting. Scanning electron micrographs and energy-dispersive X-ray spectroscopy (SEM-EDS) showed that the Zr and RE inclusions were uniformly distributed in the matrix and the composition of the RE inclusions was similar to that of a charged RE element. The content and the size of the RE inclusions increased slightly according to the charge content of the RE elements. RE inclusions in U-Zr alloys will have a positive effect on fuel performance due to their micro-size and high degree of distribution.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 953-957
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Fe-Mn Solid Solution Precursor Addition on Modified AA 7075
    Autorzy:
    Kim, Min Sang
    Kim, Dae Young
    Kim, Young Do
    Choi, Hyun Joo
    Kim, Se Hoon
    Powiązania:
    https://bibliotekanauki.pl/articles/2049310.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Zn-Mg alloy
    solid solution precursor
    mechanical properties
    Opis:
    This study suggests a new way to modify the size and morphology of Al-Fe phases in modified AA 7075 by using an Fe-Mn solid solution powder as the precursor. When Fe and Mn are added in the form of a solid solution, the diffusion of Fe and Mn toward the Al is delayed, thus altering the chemical composition and morphology of the precipitates. The fine, spherical precipitates are found to provide a good balance between strength and ductility compared to the case where Fe and Mn are separately added.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 783-787
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of Aluminum Matrix Composite Reinforced with Al0.5CoCrCuFeNi High-Entropy Alloy Particles
    Autorzy:
    Kim, Min Sang
    Son, Han Sol
    Joo, Gyeong Seok
    Kim, Young Do
    Choi, Hyun Joo
    Kim, Se Hoon
    Powiązania:
    https://bibliotekanauki.pl/articles/2174583.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum matrix composite
    high entropy alloys
    reinforcement
    powder-in-tube
    stir casting
    Opis:
    The aluminum composite with dispersed high entropy alloy were developed by stir casting involving the powder-in-tube method. First, Al0.5CoCrCuFeNi high entropy alloy (HEA) powder was made by mechanical alloying, and the powder was extruded in a tube-type aluminum container to form HEA precursor. The extruded HEA precursor was then dispersed in the aluminum matrix via stir casting. As a result, Fe-Cr-Ni based high-entropy phases was uniformly formed in the aluminum matrix, revealing ~158, 166, 235% enhancement of tensile strength by incorporating 1, 3, and 5 wt% HEA particles, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1543--1546
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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