Microstructural characterization and tensile behaviour of a 3D braided C/SiC composite fabricated by chemical vapour infiltration

被引：0
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作者：
National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, 547 Mailbox, Xi'an Shaanxi 710072, China [1 ]
机构：
来源：
Adv. Compos. Lett. | 2008年 / 4卷 / 125-130期
关键词：
3D C/SiC composites - Acoustic emission techniques - Chemical Vapour Infiltration - Interfacial debonding - Micro-structural characterization - Micro-structural observations - Nonlinear behaviours - Tensile behaviour;
D O I：
10.1177/096369350801700402
中图分类号：
学科分类号：
摘要：
The microstructure of a 3D C/SiC composite was characterized and the tensile behaviour was investigated in conjunction with acoustic emission (AE) technique. A computer model of the fibre architecture was generated for visualization and further stress analysis. The results show that the stress-strain curves exhibit mostly nonlinear behaviour with four distinguishable regions, which compare well with the AE characteristics. Microstructural observations reveal the superficial matrix cavities and large inter-bundle pores due to the 3D braiding fibre architecture. The failed specimens show ragged fracture surfaces and extensive fibre pullout, as well as interfacial debonding.
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