Fabrication of porous SiC/calcium hexaluminate composites

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• 作者：Binbin Dong ; Bo Yuan ; Gang Wang ; ^{sklarlirr2012@126.com" class="auth_mail" title="E-mail the corresponding author} ; Kuo Chen ; Jianshen Han ; Hongxia Li
• 关键词：SiC ; Calcium hexaluminate ; Porous composites ; Foaming ; Reaction bonding
• 刊名：Journal of the European Ceramic Society
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：36
• 期：16
• 页码：3889-3893
• 全文大小：2251 K

文摘

Porous SiC/calcium hexaluminate (CA₆, where C = CaO and A = Al₂O₃) composites were successfully prepared via two steps: (i) preparation of green body by direct foaming combined with pure calcium aluminate cement curing method at room temperature and (ii) sintering by in-situ formed CA₆ phase at relatively low temperature (1500 °C). The phase compositions, total porosity, compressive strength and the microstructure of porous SiC/CA₆ composites with different composition and sintered at different temperatures were investigated. CA₆ phase with plate-like morphology was the main bonding phase in the porous composites, and a compressive strength of 14.0 ± 0.6 MPa was achieved with a total porosity of 82.9%.