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논문 기본 정보

자료유형
학술저널
저자정보
이유정 (부산대학교) Min‑Jeong Lee (Korea Institute of Materials Science (KIMS)) Jung‑Yeul Yun (Korea Institute of Materials Science (KIMS)) Byoung‑Kee Kim (University of Ulsan)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.25 No.5
발행연도
2019.1
수록면
1,272 - 1,277 (6page)

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Porous metals are commonly considered as having relatively excellent characteristics, such as a large surface area, light,lower heat capacity levels, high toughness, and good permeability. Ni alloys have high corrosion resistance, good heat resistanceand chemical stability for high-temperature applications. In this study, porous Ni-based metals for hydrogen reformercatalyst support are developed with Ni alloys, in this case Ni–Cr powder (28 μm), NiO powder (2 μm), and a fine Ni powder(< 1 μm). Ni–Cr powders are spread onto Al2O3substrate by a printing process. Ni-based foam is then placed on the printedpowder and a loading plate. These are sintered at 1200 °C under a high vacuum condition. The NiO powder and the fine Nipowder slurry are then screen-printed sequentially on the double structure (NiCr-coated Ni foam). In this study, the fine Nipowder is printed one, three, and five passes. The porous Ni alloys, which have double-pore structure, triple-pore structureand quadruple-pore structure, are fabricated by screen printing processes. With increased stacking of the pore structure,the porosity decreased from 86 to 82%, and the pore sizes decreased from 6.25 to 0.3 μm. The porosity and pore size of themulti-pore structure can be controlled by the size of powder and screen printing process.

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