Damage analysis of 2D C/SiC composites subjected to thermal cycling in oxidizing environments by mechanical and electrical characterization
Damage analysis of 2D C/SiC composites subjected to thermal cycling in oxidizing environments by mechanical and electrical characterization
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通过机械和电气特性对氧化环境中热循环的 2D C/SiC 复合材料进行损伤分析
DOI：
10.1016/j.matlet.2005.05.052
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发表时间：
2005-11
影响因子：
3
通讯作者：
中科院分区：
文献类型：
--
作者：
采用力学性能测试和电阻测试相结合的方法，分析了2DC/SiC复合材料在湿氧气氛下的热循环损伤。利用扫描电子显微镜观察了复合材料的微观结构，开发了一种新型的动态损伤阻力监测系统，实现了对复合材料动态损伤阻力的自动采集和分析。结果表明，在循环温度下，基体裂纹和分层以规则的间距横向分布，表面纤维容易通过开口裂纹氧化，导致纤维的两种主要失效模式：(I)热循环下的物理断裂和(Ii)氧化气氛下的化学衰退。它们被认为是随着热循环的增加而导致机械降解的原因。在电学测试中，在每个循环中，电阻随着加热而减小，随着冷却而增大。随着循环的进行，基线阻力持续下降，约35次后趋于平稳，这与力学试验的统计结果(约38次)一致。
Damage in 2D C/SiC composites subjected to thermal cycling in wet oxygen atmosphere was analyzed by both mechanical testing and electrical resistance measurement. The microstructures were observed on a scanning electron microscope and a novel monitoring system was developed to acquire automatically and analyze the resistance of composites during their dynamic damage. Results show that under cyclic temperature, matrix cracks and delaminates transversely as regular spacing and superficial fibers are susceptible to oxidation through the opening cracks, leading to two types of major fiber failure pattern: (i) physical fracture under thermal cycling and (ii) chemical recession in oxidizing atmosphere. They are considered to be responsible for mechanical degradation with increasing thermal cycles. In electrical testing, resistance decreases upon heating and increases with cooling in each cycle. As cycling progresses, the baseline resistance decreases continuously and then levels off after about 35 cycles, which is consistent with the statistical result (about 38 times) of mechanical testing.
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影响因子：
3
作者：
B. Jang;H. Matsubara
通讯作者：
B. Jang;H. Matsubara
影响因子：
6
作者：
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F. Lamouroux;X. Bourrat;R. Nasalain;J. Sévely
影响因子：
6.3
作者：
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通讯作者：
D. Seo;Jung-Ju Lee
影响因子：
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作者：
N. Chawla;J. Holmes;R. Lowden
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N. Chawla;J. Holmes;R. Lowden