Effect of the surface microstructure of SiC inner coating on the bonding strength and ablation resistance of ZrB2-SiC coating for C/C composites

被引：51
作者：
Zhang, Yulei [1 ]
Hu, Heng [1 ]
Ren, Jincui [1 ]
Li, Tao [1 ]
Fei, Tian [1 ]
Wang, Chen [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, CC Composites Res Ctr, Xian 710072, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 16期
基金：
中国国家自然科学基金;
关键词：
Sprayed ZrB2-SiC coating; Surface morphology; Bonding strength; Ablation resistance; COATED CARBON/CARBON COMPOSITES; OXYACETYLENE TORCH; OXIDATION; BEHAVIOR; ROUGHNESS;
D O I：
10.1016/j.ceramint.2016.09.003
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The present study has been conducted in order to investigate the effect of the surface morphology of SiC inner coating on the bonding strength and ablation resistance of the sprayed ZrB2-SiC coating for C/C composites. The microstructure of SiC inner coatings prepared by chemical vapor deposition and pack cementation at different temperatures were analyzed by X-ray diffraction, scanning electron microscopy, and 3D Confocal Laser Scanning Microscope. Tensile bonding strength and oxyacetylene ablation testing were used to characterize the bonding strength and ablation resistance of the sprayed ZrB2-SiC coating, respectively. Results show that SiC inner coating prepared by chemical vapor deposition has a smooth surface, which is not beneficial to improve the bonding strength and ablation resistance of the sprayed ZrB2-SiC coating. SiC inner coating prepared by pack cementation at 2000 degrees C has a rugged surface with the roughness of 72.15 mu n, and the sprayed ZrB2-SiC coating with it as inner layer exhibits good bonding strength and ablation resistance. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：18657 / 18665
页数：9
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