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    Wyświetlanie 1-4 z 4
    Tytuł:
    Fabrication of Metal Gas Filter by Material Extrusion Additive Manufacturing Process
    Autorzy:
    Yi, Yu-Jeong
    Lee, Min-Jeong
    Yun, Su-Jin
    Park, Manho
    Kim, Ju-Yong
    Lee, Jungwoo
    Yun, Jung-Yeul
    Powiązania:
    https://bibliotekanauki.pl/articles/2174560.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gas filter
    additive manufacturing
    stainless steel
    porosity
    powder size
    Opis:
    Recently, 3D printing processes have been used to manufacture metal powder filters with manufacturing complex-shape. In this study, metal powder filters of various shapes were manufactured using the metal extrusion additive manufacturing (MEAM) process, which is used to manufacture three-dimensional structures by extruding a filament consisting of a metal powder and a binder. Firstly, filaments were prepared by appropriately mixing SUS316 powder with sizes ranging from 7.5 µm to 50 µm and a binder. These filaments were extruded at temperatures of 100℃ to 160℃ depending on the type of filament being manufactured, to form three types of cylindrical filter. Specimens were sintered in a high vacuum atmosphere furnace at 850℃ to 1050℃ for 1 hour after debinding. The specimens were analyzed for permeability using a capillary flow porometer, porosity was determined by applying Archimedes’ law and microstructure was observed using SEM.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1517--1520
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and Pore Characteristics of a SUS316L Gas Filter Fabricated by Wet Powder Spraying
    Autorzy:
    Lee, Min-Jeong
    Yi, Yu-Jeong
    Kim, Hyeon-Ju
    Park, Manho
    Lee, Jungwoo
    Yun, Jung-Yeul
    Powiązania:
    https://bibliotekanauki.pl/articles/2174584.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wet powder spraying process
    double pore structures
    pore properties
    rotation speed
    coating time
    Opis:
    In this study, a flake-shaped metal powder was coated on a tube shaped pre-sintered 316L stainless steel support using a wet powder spraying process to fabricate a double pore structure, and the pore characteristics were analyzed according to coating time and tube rotation speed. The thickness of the coated layer was checked via optical microscopy, and porosity was measured using image analysis software. Air permeability was measured using a capillary flow porometer. As a result of the experiment, the optimal rotation speed of the support tube was established as 200 rpm. When the rotation speed was fixed, the coating thickness and the coating amount of the double pore structure increased as the coating time increased. The porosity of the double pore structure was increased due to the irregular arrangement of the flake-shaped powder. The air permeability of the double pore structure decreased with increasing fine pore layer thickness.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1547--1550
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on Pore Properties of Hastelloy Powder Porous Metal Fabricated by Electrostatic Powder Coating
    Autorzy:
    Lee, Min-Jeong
    Yi, Yu-Jeong
    Kim, Hyeon-Ju
    Park, Man-Ho
    Kim, Byoung-Kee
    Yun, Jung-Yeul
    Powiązania:
    https://bibliotekanauki.pl/articles/353929.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrostatic powder coating
    Hastelloy
    porous metal
    pore properties
    powder coating amount
    Opis:
    Porous metals show not only extremely low density, but also excellent physical, mechanical and acoustic properties. In this study, Hastelloy powders prepared by gas atomization are used to manufacture 3D geometries of Hastelloy porous metal with above 90% porosity using electrostatic powder coating process. In order to control pore size and porosity, foam is sintered at 1200~1300°C and different powder coating amount. The pore properties are evaluated using SEM and Archimedes method. As powder coating amount and sintering temperature increased, porosity is decreased from 96.4 to 94.4%. And foam density is increased from 0.323 to 0.497 g/cm3 and pore size is decreased from 98 to 560 μm. When the sintering temperature is increased, foam thickness and strut thickness are decreased from 9.85 to 8.13 mm and from 366 to 292 μm.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 547-550
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Powder Shape and Sintering Temperature on the Preparation of Ni-Based Porous Metal
    Autorzy:
    Yi, Yu-Jeong
    Lee, Min-Jeong
    Kim, Hyeon-Ju
    Yang, Sangsun
    Park, Man-Ho
    Kim, Byoung-Kee
    Yun, Jung-Yeul
    Powiązania:
    https://bibliotekanauki.pl/articles/351782.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Hastelloy
    porosity
    porous metal
    powder shape
    sintering temperature
    Opis:
    Usually porous metals are known as relatively excellent characteristic such as large surface area, light, lower heat capacity, high toughness and permeability for exhaust gas filter, hydrogen reformer catalyst support. The Ni alloys have high corrosion resistance, heat resistance and chemical stability for high temperature applications. In this study, the Ni-based porous metals have been developed with Hastelloy powder by gas atomization and water atomization in order to find the effects of powder shape on porous metal. Each Hastelloy powder is pressed on disk shape of 2 mm thickness with 12 tons using uniaxial press machine. The specimens are sintered at various temperatures in high vacuum condition. The pore properties were evaluated using Porometer and microstructures were observed with SEM.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 917-920
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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