A multilayer coating of dense SiC alternated with porous Si-Mo for the oxidation protection of carbon/carbon silicon carbide composites
A multilayer coating of dense SiC alternated with porous Si-Mo for the oxidation protection of carbon/carbon silicon carbide composites
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DOI：
10.1016/j.carbon.2007.10.035
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发表时间：
2008-01-01
期刊：
影响因子：
10.9
通讯作者：
Huang Bai-Yun
中科院分区：
文献类型：
--
作者：
Yan Zhi-Qiao;Xiong Xiang;Huang Bai-Yun
为了改善碳/碳多孔预制体液态硅浸渗法制备的碳/碳硅化物/碳化物复合材料的抗氧化性能，采用化学气相沉积结合浆料喷涂的方法制备了致密SiC与多孔Si-Mo相间的多层涂层。氧化实验表明，涂层试样在1673 K空气中氧化150 h后，失重率仅为0.25%.涂层试样在1673 ~ 373 K的46个热震循环中增重。SiC/Si-Mo涂层在两种试验中均保持完整，未出现明显的失效现象，其优异的抗氧化性能和抗热震性能与涂层的交替结构有关。(c)2007爱思唯尔有限公司保留所有权利。
In order to improve the oxidation behavior of carbon/carbon silicide carbide composites prepared by liquid silicon infiltration of carbon/carbon porous preforms, a multilayer coating of dense SiC alternated with porous Si-Mo was prepared by chemical vapor deposition combined with slurry painting. Oxidation test showed that weight loss of the coated sample was only 0.25% after 150 h oxidation in air at 1673 K. And the coated sample gained weight in the course of 46 cycles of thermal shock test between 1673 K and 373 K. The coating remained intact during the two kinds of tests and no obvious failure was found. The excellent oxidation protective ability and thermal shock resistance of the SiC/Si-Mo coating can be attributed to the alternated structure. (c) 2007 Elsevier Ltd. All rights reserved.