Fabrication of Porous Cu by Freeze-Drying Method of CuO-Camphene Slurry

Min-Soo Kim; Sung-Tag Oh; Si-Young Chang; Myung-Jin Suk

doi:10.4150/KPMI.2011.18.4.327

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CuO-Camphene 슬러리의 동결건조에 의한 Cu 다공체 제조: 김민수, 오승탁, 장시영, 석명진
Fabrication of Porous Cu by Freeze-Drying Method of CuO-Camphene Slurry: Min-Soo Kim, Sung-Tag Oh, Si-Young Chang, Myung-Jin Suk; Journal of Korean Powder Metallurgy Institute 2011;18(4):327-331
DOI: https://doi.org/10.4150/KPMI.2011.18.4.327

¹서울과학기술대학교 신소재공학과
²서울과학기술대학교 신소재공학과
³한국항공대학교 항공재료공학과
⁴강원대학교 재료금속공학과
¹Department of Materials Science and Engineering, Seoul National University of Science and Technology
²Department of Materials Science and Engineering, Seoul National University of Science and Technology
³Department of Materials Engineering, Korea Aerospace University
⁴Department of Materials and Metallurgical Engineering, Kangwon National University

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Abstract

In order to fabricate the porous metal with controlled pore characteristics, unique processing by using metal oxide powder as the source and camphene as the sublimable material is introduced. CuO powder was selected as the source for the formation of Cu metal via hydrogen reduction. Camphene-based CuO slurry, prepared by milling at 47°C with a small amount of dispersant, was frozen at -25°C. Pores were generated subsequently by sublimation of the camphene. The green body was hydrogen-reduced at 200°C for 30 min, and sintered at 500-700°C for 1 h. Microstructural analysis revealed that the sintered Cu showed aligned large pore channels parallel to the camphene growth direction, and fine pores are formed around the large pore. Also, it showed that the pore size was controllable by the slurry concentration.

Keywords: Freeze-drying process;CuO;Hydrogen reduction;Porous Cu;

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