Fabrication of ceramics with complex porous structures by the impregnate-freeze-casting process

被引：0
|
作者：
Han, Jiecai [1 ]
Hu, Luyang [1 ]
Zhang, Yumin [1 ]
Zhou, Yufeng [1 ]
机构：
[1] Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China
来源：
Journal of the American Ceramic Society | 2009年 / 92卷 / 09期
关键词：
The ceramics with complex porous structures were fabricated by a combination of impregnating and freeze-casting process. The polyurethane sponge was impregnated in the mold with 20 vol% of aqueous alumina slurry; and then the bottom of the cast body was kept at a constant cooling rate of 6C/min to induce unidirectional solidification. After drying and sintering of the green part; porous ceramic with obvious lamellar architectures was prepared. The lamellae thickness and interlayer distance were as large as ∼9 and ∼15 μm; respectively. The large pores; which resulted from the burn-up of sponge struts were homogeneously distributed in the sample. The use of the porous template introduced some local interruption of the lamellar structures. However; high compression strength for the porous ceramic can still be obtained. © 2009 The American Ceramic Society;
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摘要：
Journal article (JA)
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页码：2165 / 2167
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