C/C复合材料在原子氧辐照下的结构性能演变

doi:10.3724/SP.J.1077.2013.12622

无机材料学报 ›› 2013, Vol. 28 ›› Issue (8): 853-858.DOI: 10.3724/SP.J.1077.2013.12622 CSTR: 32189.14.SP.J.1077.2013.12622

C/C复合材料在原子氧辐照下的结构性能演变

田聪, 成来飞, 栾新刚

(西北工业大学超高温结构复合材料重点实验室, 西安710072)

收稿日期:2012-10-18 修回日期:2013-01-10 出版日期:2013-08-20 网络出版日期:2013-07-15
作者简介:田聪(1987-), 男，硕士研究生. E-mail:tiancong@mail.nwpu.edu.cn
基金资助:
国家973计划项目(2011CB605806); 国家自然科学基金(50820145202)

Degradation Behaviour of C/C composites by Atomic Oxygen Irradiation

TIAN Cong, CHENG Lai-Fei, LUAN Xin-Gang

(Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern polytechnical University, Xi’an 710072, China)

Received:2012-10-18 Revised:2013-01-10 Published:2013-08-20 Online:2013-07-15
About author:TIAN Cong. E-mail:tiancong@mail.nwpu.edu.cn
Supported by:
National Basic Research Program of China(2011CB605806); National Natural Science Foundation of China(50820145202)

摘要/Abstract

摘要： 通过分析失重率、显微形貌变化讨论了原子氧辐照对C/C复合材料以及SiC基体改性C/C复合材料(C/C-SiC)的损伤机制; 并通过热膨胀系数(CTE)、热扩散率(TD)以及弯曲强度等性能的变化, 进一步讨论了原子氧辐照损伤对材料热物理及力学性能影响。结果表明, C/C复合材料受原子氧辐照损伤是物理化学综合作用, 属于冲击诱发-增强表面化学刻蚀; SiC组元表现出良好的抗原子氧侵蚀性能, 阻碍了原子氧向材料内部侵蚀, 但是SiC组元在更长时间辐照后出现机械破损; C/C复合材料在原子氧辐照下失重率呈线性增加, 而C/C-SiC复合材料失重率小于C/C复合材料且增长幅度越来越小; C/C复合材料和C/C-SiC复合材料的整体结构性能在辐照损伤后发生了一定变化。

关键词: C/C复合材料, C/C-SiC复合材料, 原子氧

Abstract: Erosion mechanisms of C/C composite and C/C-SiC composite (matrix modification for C/C composite using SiC) irradiated by atomic oxygen (AO) were studied by analyzing erosion morphology and mass loss rate. Thermal diffusivity coefficient, thermal expansion coefficient and flexural strength were determined before and after AO exposure test to discuss thermal physics and mechanics of AO damage. The results show that the erosion of C/C composite is the cooperation of chemical oxidation and mechanical erosion, which can be termed bombardment-induced surface chemical etching. The SiC components show good resistance to atomic oxygen erosion and hinder internal erosion. However, SiC components can also be damaged mechanically as the exposure time increasing. The mass loss rate of C/C composite is approximately proportional to the exposure time, while the mass loss rate of C/C-SiC composite is smaller than that of C/C composites and the increase of the mass loss rate slows down as the exposure time increasing. The changes of thermophysical property and mechanical property show that the overall performances of C/C and C/C-SiC have been changed to some extent after the AO exposure testing.

Key words: C/C composite, C/C-SiC composite, atomic oxygen

中图分类号:

TQ174

田聪, 成来飞, 栾新刚. C/C复合材料在原子氧辐照下的结构性能演变[J]. 无机材料学报, 2013, 28(8): 853-858.

TIAN Cong, CHENG Lai-Fei, LUAN Xin-Gang. Degradation Behaviour of C/C composites by Atomic Oxygen Irradiation[J]. Journal of Inorganic Materials, 2013, 28(8): 853-858.

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C/C复合材料在原子氧辐照下的结构性能演变

Degradation Behaviour of C/C composites by Atomic Oxygen Irradiation

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