Microstructure and Ablation Property of TaC-SiC Composite Coatings
Microstructure and Ablation Property of TaC-SiC Composite Coatings
复制标题
DOI：
10.4028/www.scientific.net/kem.697.535
复制
发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Y. Niu;H. Pu;Li Ping Huang;Junchai Zhao;Xue-bin Zheng
中科院分区：
文献类型：
--
作者：
Y. Niu;H. Pu;Li Ping Huang;Junchai Zhao;Xue-bin Zheng
采用低压等离子喷涂(LPPS)技术制备了不同碳化硅含量(分别为5%、10%和15%)的TaC基复合涂层。对涂层的物相组成和微观结构进行了表征。利用2000℃以上的等离子火焰对TaC-SiC复合涂层的烧蚀性能进行了评价。结果表明，复合涂层中碳化硅分布均匀。碳化硅的加入有利于复合涂层的抗烧蚀性能。随着碳化硅加入量的增加，复合涂层的质量损失减小。烧蚀60 S后，TaC-15vol.%SiC复合涂层的质量损失约为0.15%，是三种涂层中耐烧蚀性能最好的涂层。认为涂层表面形成的Ta2O5-SiO_2混合层有助于提高涂层的耐烧蚀性能。
TaC-based composite coatings containing different contents of SiC (5 vol.%, 10 vol.% and 15 vol.%, respectively) were fabricated by low pressure plasma spray (LPPS) technique. The phase composition and microstructure of the coatings were characterized. The ablation property of the TaC-SiC composite coatings was evaluated by a plasma flame over 2000 oC. The results showed that SiC was uniformly distributed in the composite coatings. The addition of SiC was good for the ablation-resistance of the composite coatings. The mass loss of the composite coatings decreased with increasing the amount of SiC. The mass loss of the TaC-15vol.%SiC composite coating was about 0.15 % after ablation for 60 s, which exhibited the best ablation-resistance among the three kinds of coatings. It was thought that the formed Ta2O5-SiO2 mixed layer on the coating surface contributed to the improved ablation resistance.