期刊
CERAMICS INTERNATIONAL
卷 37, 期 4, 页码 1277-1283出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2010.12.002
关键词
Ceramic matrix composites (CMCs); Environmental degradation; Liquid metal infiltration (LMI)
资金
- Chinese Natural Science Foundation [90716023]
- State Key Laboratory of Solidification Processing (NWPU) [21-TP2007]
- 111 project
Carbon/carbon-zirconium carbide (C/C-ZrC) composites were prepared by reactive melt infiltration. Carbon fiber felt was firstly densified by carbon using chemical vapor infiltration to obtain a porous carbon/carbon (C/C) skeleton. The zirconium melt was then infiltrated into the porous C/C at temperatures higher than the melting point of zirconium to obtain C/C-ZrC composites. The infiltration depth as a function of annealing temperature and dwelling time was studied. A model based on these results was built up to describe the kinetic process. The ablation properties of the C/C-ZrC were tested under an oxyacetylene torch and a laser beam. The results indicate that the linear and mass ablation rates of the C/C-ZrC composites are greatly reduced compared with C/SiC-ZrB2, C/SiC, and C/C composites. The formation of a dense layer of ZrC and ZrO2 mixture at high temperatures is the reason for high ablation resistance. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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