期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 148, 期 1-3, 页码 211-214出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2007.09.026
关键词
silicon carbide; porous ceramic; pore size distribution; surface diffusion; filter and membrane support
Porous silicon carbide was fabricated by using nano-sized SiC powder additions and different. cold isostatic pressing (CIP) conditions followed by sintering at 1500-1800 degrees C. The relationship between the processing conditions, pore size and microstructure was examined.. The cold isostatic pressing conditions, sintering temperature and nano-sized additives were effective for controlling pore size and microstructure. T he pore size and particle size increased with increasing sintering temperature, attributed to surface diffusion. However, no densification occurred because of pore enlargement. In addition, the compressive strength increased with sintering temperature and reached values as high as 513 MPa. This was due to the formation of well-developed neck areas. This study suggests that the promoted mass transfer can provide high strength due to increased neck area. (C) 2007 Elsevier B.V. All rights reserved.
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