Stress-corrosion behavior of SiCf/SiC under CMAS-wet-oxygen environments

被引：8

作者：

Guo, Feiyu ^{[1
,2
,3
]}

Chen, Xiaowu ^{[1
,2
]}

Yang, Jinshan ^{[1
,2
]}

Zhang, Xiangyu ^{[1
,2
]}

Hu, Jianbao ^{[1
,2
]}

Kan, Yanmei ^{[1
,2
]}

Zhou, Haijun ^{[1
,2
]}

Xue, Yudong ^{[1
,2
]}

Qin, Hao ^{[1
,2
]}

You, Xiao ^{[1
,2
]}

Dong, Shaoming ^{[1
,2
,3
]}

机构：

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

[2] Chinese Acad Sci, Shanghai Inst Ceram, Struct Ceram & Composites Engn Res Ctr, Shanghai 200050, Peoples R China

[3] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

来源：

CORROSION SCIENCE | 2024年 / 228卷

基金：

中国国家自然科学基金;

关键词：

Acoustic emission; CMAS-wet-oxygen; Tensile behavior; Corrosion mechanism; SiCf/SiC; ACOUSTIC-EMISSION; COMPOSITES; DAMAGE;

D O I：

10.1016/j.corsci.2024.111844

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SiCf/SiC used in aeroengine hot sections suffer serious recession under complicated environments. Here, synergistic effects of CMAS and steam on the degradation of pre-cracked SiCf/SiC are investigated. Based on microstructure characterization, it can be found that BN-SiC interphase/fiber separation mode at 1100 degrees C is changed into BN-SiC interphase/matrix separation at 1300 degrees C in cracks. AE technique is used to analyze the damage evolution of SiCf/SiC. CMAS with high fluidity induces severe oxidation of the composite. Therefore, AE activity weakens and the damage in SiCf/SiC decreases at 1300 degrees C. This work provides reference for microstructure design of SiCf/SiC in corrosive environments.

引用

页数：11

共 33 条

[1] Acoustic emission A promising and challenging technique for process monitoring in sheet metal forming [J].