Silicon carbide coating to protect carbon/carbon composites against oxidation
Silicon carbide coating to protect carbon/carbon composites against oxidation
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DOI：
10.1016/j.scriptamat.2004.12.029
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发表时间：
2005-05-01
影响因子：
6
通讯作者：
Sun, GD
中科院分区：
文献类型：
--
作者：
Fu, QG;Li, HJ;Sun, GD
为了保护C/C复合材料免受氧化，采用两步包埋法制备了碳化硅涂层。X射线衍射分析表明，第一步包渗得到的内涂层为β-SiC层，第二步包渗得到的外涂层由α-SiC、Si和β-SiC组成。涂层具有优异的抗氧化性能，在1773 K空气中可保护C/C复合材料310 h以上不被氧化。涂层C/C复合材料的重量损失被认为是由于部分玻璃的脱粘和涂层表面气泡的形成引起的。(C)2005 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
In order to protect carbon/carbon (C/C) composites from oxidation, a silicon carbide coating has been produced by a two-step pack cementation technique. XRD analysis showed that the inner coating obtained from the first step was a beta-SiC layer and the outer coating formed by the second step pack cementation was composed of alpha-SiC, Si and beta-SiC. The as-received coating provided excellent oxidation resistance, proving able to protect C/C composites from oxidation for more than 310 h at 1773 K in air. The weight loss of the coated C/C composites was considered to arise from the debonding of some glass and the formation of bubble holes on the coating surface. (C) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.