Thermal damage and microstructure evolution mechanisms of Cf/SiBCN composites during plasma ablation

被引：31

作者：

Ding, Qi ^{[1
,5
]}

Ni, Dewei ^{[1
,3
]}

Ni, Na ^{[5
]}

Jiang, Youlin ^{[1
,3
,4
]}

Chen, Bowen ^{[1
,3
,4
]}

Chen, Xiaowu ^{[1
,3
]}

Lu, Jun ^{[1
,3
,4
]}

Niu, Yaran ^{[6
]}

Zhou, Haijun ^{[1
,3
]}

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

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

[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[5] Shanghai Jiao Tong Univ, Sch Mech Engn, Key Lab, Educ Minist Power Machinery & Engn, Shanghai 200240, Peoples R China

[6] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Coating Mat CAS, Shanghai 200050, Peoples R China

来源：

CORROSION SCIENCE | 2020年 / 169卷

基金：

中国国家自然科学基金;

关键词：

C-f/SiBCN composites; Plasma ablation; Thermal damage mechanism; N CERAMICS; MATRIX COMPOSITES; PHASE EVOLUTION; PRECURSOR; CRYSTALLIZATION; BEHAVIOR; STABILITY; INFILTRATION; RESISTANCE; FIBERS;

D O I：

10.1016/j.corsci.2020.108621

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ablation behavior and thermal damage mechanisms of C-f/SiBCN composites were investigated in plasma ablation flame under a heat flux of 4.02 MW/m(2), simulating a hypersonic service environment at similar to 2200 degrees C. Oxide layer formed on the composites surface effectively protects internal C-f/SiBCN composites from further ablation. However, the internal C-f/SiBCN composites endure severe thermal damage and complex reactions, leading to decomposition of SiBCN matrix and formation of alpha/beta-SiC, beta-Si3N4 grains, amorphous C layer and ring-like SiC layer. Based on detailed microstructure and phase composition analysis, thermal damage and microstructure evolution mechanisms of C-f/SiBCN composites during plasma ablation are clarified.

引用

页数：10

共 36 条

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