材料科学
微观结构
磁导率
多孔性
复合材料
化学工程
膜
遗传学
生物
工程类
作者
In‐Hyuck Song,Mijung Park,Hai-Doo Kim,Young‐Wook Kim,Ji-Soo Bae
标识
DOI:10.4191/kcers.2010.47.6.546
摘要
The achievement of high gas permeability is a key factor in the development of porous SiC ceramics for applications of hot gas filter, vacuum chuck, and air spindle. However, few reports on the gas permeability of porous SiC ceramics can be found in the literature. In this paper, porous SiC ceramics were fabricated at temperatures ranging from 1600℃ to 1800℃ using the mixing powders of SiC, silicon, carbon and boron as starting materials. In some samples, expanded hollow microspheres as a pore former were used to make a cellular pore structure. It was possible to produce Si bonded SiC ceramics with porosities ranging from 42% to 55%. The maximum bending strength was 58㎫ for the carbon content of 0.2 wt% and sintering temperature of 1700℃. The increase of air permeability was accelerated by addition of hollow microsphere as a pore former.
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