Double layer ZrSi2-ZrC-SiC/SiC oxidation protective coating for carbon/carbon composites
Double layer ZrSi2-ZrC-SiC/SiC oxidation protective coating for carbon/carbon composites
复制标题
碳/碳复合材料双层ZrSi2-ZrC-SiC/SiC氧化防护涂层
DOI：
10.1179/1743294414y.0000000428
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发表时间：
2015-04-01
影响因子：
2.8
通讯作者：
Ma, H. L.
中科院分区：
文献类型：
--
作者：
Hu, M. H.;Li, K. Z.;Ma, H. L.
采用包埋法在碳/碳（C/C）复合材料表面制备了ZrSi2-ZrC-SiC/SiC双层涂层。研究了涂层的微观结构、氧化性能和抗热震性能。结果表明，外涂层主要成分分别为ZrSi2、ZrC、SiC和Si。氧化测试在空气中进行，温度为1173 K 100 分钟和1773 K 67 小时，重量减少了0.37% 和0.12%。经过1773 K和室温之间的20次热冲击后，涂层样品的重量仅增加了0.12%。优异的抗热震性能归因于分布在SiC颗粒间隙中的微量相易于氧化以及涂层的粗糙度。
A ZrSi2-ZrC-SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi2, ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0.37 and 0.12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0.12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.