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http://dx.doi.org/10.4150/KPMI.2011.18.4.327

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

Kim, Min-Soo (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Oh, Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Chang, Si-Young (Department of Materials Engineering, Korea Aerospace University)
Suk, Myung-Jin (Department of Materials and Metallurgical Engineering, Kangwon National University)
Publication Information
Journal of Powder Materials / v.18, no.4, 2011 , pp. 327-331 More about this Journal
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 $47^{\circ}C$ with a small amount of dispersant, was frozen at $-25^{\circ}C$. Pores were generated subsequently by sublimation of the camphene. The green body was hydrogen-reduced at $200^{\circ}C$ for 30 min, and sintered at $500-700^{\circ}C$ 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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Times Cited By KSCI : 1  (Citation Analysis)
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