• Title/Summary/Keyword: Wet powder spraying process

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Fabrication and Pore Properties of SUS316L Membrane with Double-Layered Pore Structures by Wet Powder Spraying

  • Min-Jeong Lee;Hyeon-Ju Kim;Manho Park;Jung-Yeul Yun
    • Archives of Metallurgy and Materials
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    • v.67 no.4
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    • pp.1531-1534
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    • 2022
  • In this study, a SUS316L membrane having double layered pore structures was fabricated, and the pore characteristics were analyzed after coating with a spherical powder and a flake-shaped powder on a disk-shaped SUS316L support using a wet powder spraying process. The thickness of the coated layer was checked using an optical microscope, and air permeability was measured using a capillary flow porometer. When the coating amount was similar, the fine porous layer prepared using flake powder was thicker and showed higher porosity. In the case of a similar thickness, the case of using flake powder was half of the amount of spherical powder used. Therefore, it was confirmed that it is possible to manufacture a metal membrane having a high filter efficiency even with a small coating amount when using the flake powder.

Microstructure and Pore Characteristics of a SUS316L Gas Filter Fabricated by Wet Powder Spraying

  • Min-Jeong Lee;Yu-Jeong Yi;Hyeon-Ju Kim;Manho Park;Jungwoo Lee;Jung-Yeul Yun
    • Archives of Metallurgy and Materials
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    • v.67 no.4
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    • pp.1547-1550
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    • 2022
  • 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.