Oxidation Behavior of SiCf/SiC Composites Modified by Layered-Y2Si2O7 in Wet Oxygen Environment

被引：15

作者：

Wang Peng ^{[1
,2
]}

Wang Qing-Lei ^{[3
]}

Zhang Xiang-Yu ^{[1
,2
]}

Yang Jin-Shan ^{[1
,2
]}

Zhou Hai-Jun ^{[1
,2
]}

Hu Jian-Bao ^{[1
,2
]}

Ding Yu-Sheng ^{[1
,2
]}

Dong Shao-Ming ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Beijing Inst Space Mech & Elect, Beijing 100076, Peoples R China

来源：

JOURNAL OF INORGANIC MATERIALS | 2019年 / 34卷 / 08期

基金：

中国国家自然科学基金;

关键词：

ceramic composites; rare-earth silicate; oxidation; BARRIER COATINGS; TEMPERATURE; AL2O3;

D O I：

10.15541/jim20180590

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：

SiCf/SiC composites modified by layered Y2Si2O7 were presented in this research. Layered Y2Si2O7 was transformed from yttrium oxide by chemical vapor infiltration process in SiC fiber preform, in which yttrium oxide was generated by the solution impregnation and pyrolysis method. Oxidation behavior of the layered-Y2Si2O7 modified SiCf/SiC composites was studied in the wet oxygen environment at 1400 degrees C, showing that Y2Si2O7 can concentrate on the oxidation surface to form a protective layer during the oxidation process. The bending strengths of SiCf/SiC composites with one layer or three layers of Y2Si2O7 remain 60.38% and 71.93%, respectively, after the oxidation for 80 h. In contrast, it is only 50.11% for SiCf/SiC composites without Y2Si2O7. Therefore, layered distribution of Y2Si2O7 significantly improves the oxidation resistance of SiCf/SiC composites in wet oxygen environment.

引用

页码：904 / 908

页数：5

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