The authors thank for the financial support from the National Natural Science Foundation of China (Project No. 50902140 and 50872142).
Mechanical Properties of Solid-Sintered Porous Silicon Carbide Ceramics†
Article first published online: 2 APR 2013
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 15, Issue 6, pages 491–495, June 2013
How to Cite
Zuo, K.-H., Zeng, Y.-P. and Jiang, D. (2013), Mechanical Properties of Solid-Sintered Porous Silicon Carbide Ceramics. Adv. Eng. Mater., 15: 491–495. doi: 10.1002/adem.201200278
- Issue published online: 11 JUN 2013
- Article first published online: 2 APR 2013
- Manuscript Accepted: 10 JAN 2013
- Manuscript Received: 13 SEP 2012
- National Natural Science Foundation of China. Grant Numbers: 50902140, 50872142
The freeze-drying combining solid sintering is a good method to fabricate porous SiC ceramics with good high temperature mechanical properties. Though SiC ceramics are sintered at a high temperature of 2150 °C, there are still large quantity of macropores generated by sublimating large ice crystals and micropores in the ceramic wall caused by small ice crystals sublimating, SiC particles stacking, and burning out of polyvinyl alcohol (PVA). The content of PVA affects the microstructure and strength. As increasing the content of PVA, the size of pores caused by sublimating the ice crystals decreases while both open porosity and room temperature strength increase. After being treated at a temperature of 1200 and 1500 °C, the ceramics exhibit good thermal shock damage resistance.