Mechanical Properties and Oxidation Behaviors of Self-Healing SiC_f/SiC-SiBCN Composites Exposed to H_2O/O_2/Na_2SO_4 Environments

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	Mechanical Properties and Oxidation Behaviors of Self-Healing SiC_f/SiC-SiBCN Composites Exposed to H_2O/O_2/Na_2SO_4 Environments
	Ji Suya; Liang Bin; Hu Chenglong; Pang Shengyang; Zhao Rida; Li Jian; Tang Sufang
	2023
发表期刊	ACTA METALLURGICA SINICA(ENGLISH LETTERS)
ISSN	1006-7191
卷号	36 期号:11 页码:1909-1923
摘要	The oxidation behaviors and their influence on the mechanical properties of self-healing SiC_f/SiC-SiBCN composites were investigated in H_2O/O_2 and H_2O/O_2/Na_2SO_4 environments at 1200–1350 °C for 100 h. As the temperatures increase from 1200 to 1350 °C, the oxidation rate constants increase from 0.45×10~(-7) to 1.58×10~(-7) mg2/(mm4 h) in H_2O/O_2, and from 1.02×10~(-7) to 3.42×10~(-7) mg2/(mm4 h) in H_2O/O_2/Na_2SO_4. The involvement of Na_2SO_4 leads to the formation of a loose lamellar oxide layer, the breakage of the SiBCN/CVI-SiC interface and the decrease in the oxide viscosity, thus accelerating the oxidation of the composites. The composites show the maximum retention rate of strength (102%, 535.71 MPa) after oxidation in H_2O/O_2 at 1200 °C due to the good self-healing capacity of the produced glass, while the minimum (82%, 430.56 MPa) in H_2O/O_2/Na_2SO_4 at 1350 °C caused by the severe microstructural corrosion derived from Na_2SO_4.
关键词	SiC_f/SiC-SiBCN composite Mechanical property Oxidation Chemical vapor infiltration and polymer infiltration and pyrolysis (CVI-PIP)·Self-healing
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177040
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Ji Suya,Liang Bin,Hu Chenglong,et al. Mechanical Properties and Oxidation Behaviors of Self-Healing SiC_f/SiC-SiBCN Composites Exposed to H_2O/O_2/Na_2SO_4 Environments[J]. ACTA METALLURGICA SINICA(ENGLISH LETTERS),2023,36(11):1909-1923.
APA	Ji Suya.,Liang Bin.,Hu Chenglong.,Pang Shengyang.,Zhao Rida.,...&Tang Sufang.(2023).Mechanical Properties and Oxidation Behaviors of Self-Healing SiC_f/SiC-SiBCN Composites Exposed to H_2O/O_2/Na_2SO_4 Environments.ACTA METALLURGICA SINICA(ENGLISH LETTERS),36(11),1909-1923.
MLA	Ji Suya,et al."Mechanical Properties and Oxidation Behaviors of Self-Healing SiC_f/SiC-SiBCN Composites Exposed to H_2O/O_2/Na_2SO_4 Environments".ACTA METALLURGICA SINICA(ENGLISH LETTERS) 36.11(2023):1909-1923.