Microstructural Characterization and Tensile Behaviour of a 3D Braided C/SiC Composite Fabricated by Chemical Vapour Infiltration

Advanced Composites Letters

Article

Litong Zhang¹  Laifei Cheng¹  Yiqiang Wang¹  Junqiang Ma¹ 

[1] National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, 547 Mailbox, Xi'an Shaanxi 710072, People's Republic of China;

关键词: Ceramic matrix composites;    Fibre architecture;    Microstructure;    Tensile behaviour;   

DOI  :  10.1177/096369350801700402

 received in 2008-04-21, accepted in 2008-07-04,  发布年份 2008

来源: Sage Journals

【 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.

【 授权许可】

Unknown   
© 2008 SAGE Publications Ltd

【 图 表 】

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