Structure and Oxidation Behavior of a Plasma Sprayed Yttrium Silicates Coated SiC-C/C with a Glass Outer Sealant from 1573K to 1873K

作     者：黄剑锋 LI Hejun ZENG Xierong CAO Liyun LI Kezhi XIONG Xinbo LI Long HUANG Jianfeng~(1,2*) LI Hejun~2 ZENG Xierong~3 CAO Liyun~1 LI Kezhi~2 XIONG Xinbo~3 LI Long~3 (1.School of Materials Science and Engineering,Shaanxi University of Science and Technology,Xian 710021,China;2.C/C Composites Technology Research Center,Northwestern Polytechnical University,Xi an 710072,China;3.Department of Materials Science,Shenzhen University,Shenzhen 518060,China)

作者机构：School of Materials Science and Engineering Shaanxi University of Science and Technology Xi an 710021 China C/C Composites Technology Research Center Northwestern Polytechnical University Xi an 710072 China Department of Materials Science Shenzhen University Shenzhen 518060 China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2008年第23卷第1期

页      面：33-37页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Supported by National Natural Science Foundation of China(No.50772063) the Program for New Century Excellent Talents in University(No.NCET-06-0893) 

主　　题：carbon/carbon composites plasma spraying coating oxidation behavior 

摘      要：Different compositions of yttrium silicates coatings were deposited on SiC-C/C by plasma spraying and an outer borosilicate glass was applied on the yttrium silicates coatings surfaces. The structure of the multi-layer coatings was characterized by XRD and SEM analyses. High temperature oxidation behavior of the multi-layer coatings coated C/C composites was investigated. Results show that SiC/2SiO2 Y2O3/1.5SiO2 Y203/ SiO2 Y2O3/glass multi-layer coating has better high temperature oxidation resistance, protecting carbon/ carbon composites from oxidation at 1 773 K in air for 164 h with the weight loss of 1.65%. The oxidation weight loss of the coated C/C with time accorded with parabolic rule in the temperature range 1 573 K-1 873 K; and the corresponding oxidation activation energy of the coated carbon/carbon composites is 132.2 kJ/mol.