C/SiC复合材料在应力氧化环境下的失效时间和残余强度建模

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Transactions of the Indian Ceramic Society Pub Date : 2020-10-01 DOI:10.1080/0371750x.2020.1808078

Peng Chen, X. Niu, Xihui Chen, Zhigang Sun, P. Zou, Yingdong Song

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引用次数: 1

摘要

基于C/SiC复合材料在900o-1200oC应力氧化环境下的氧化动力学，提出了一个非均匀氧化模型。结合纤维缺口模型、Curtin强度模型和BHE模型，该非均匀模型能够准确预测C/SiC复合材料的失效时间和残余强度。此外，还考虑了模型的初始缺陷（基体涂层裂纹和开孔）、涂层的影响，分析了纤维强度和断裂率。此外，还讨论了氧化时间、应力、温度、Si-C涂层厚度和纤维体积分数对失效时间和残余强度的影响，预测结果与实验数据吻合较好。图形摘要

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Modeling the Failure Time and Residual Strength of C/SiC Composites under Stress-Oxidation Environment

Based on the oxidation kinetics of C/SiC composites at 900o-1200oC in stress-oxidation environment, a non-uniform model of oxidation has been suggested in this paper. Combined with fiber notch model, Curtin’s strength model and BHE model, the non-uniform model is able to predict the failure time and residual strength of C/SiC composites accurately. Besides, the initial defects of the model (matrix coating crack and open porosity), the effects of coating were taken into account, and the fiber strength and broken ratio were analyzed. Furthermore, the effects of oxidation time, stress, temperature, Si C coating thickness and volume fraction of fiber on the failure time and residual strength were discussed, and the predicted results showed a good consistency with the experimental data. GRAPHICAL ABSTRACT

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.