The effects of crossover pores on high temperature bending behavior of 3-dimensional braided C/SiC

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	The effects of crossover pores on high temperature bending behavior of 3-dimensional braided C/SiC
	J. Z. Li; S. R. Qiao; D. Han; D. X. Li; L. T. Zhang; L. F. Cheng
	2006
发表期刊	Science and Engineering of Composite Materials
ISSN	0334-181X
卷号	13 期号:4 页码:313-322
摘要	Continuous carbon fiber reinforced silicon carbide matrix composites (C/SiC) are potential for application as high temperature materials and components in severe environments. The three-point-bending strength of 3-dimensional braided C/SiC composites (31) C/SiC was tested from room temperature up to 2050 degrees C in vacuum. Below 1000 degrees C, the flexural strength of 3D C/SiC composites increased with temperature and from 1000 degrees C to 1500 degrees C decreased with temperature. Over 1900 degrees C, the composite specimens retained high strength and deformed over the nominal maximum deflection in the test machine without fracture. The microstructure of 3D C/SiC, after bending test at 2050 degrees C were systematically characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). No glass phase was found in the composites. The crossover pores were investigated and its configuration change with time was observed on tensile creep specimen. Under loads, the angle between fiber bundles changed from buckling and torsion because of the large crossover pores and weak matrix restraint at these sites. When the structure of the test specimen finally determined by machining made the particular arrangement of crossover pores in a vertical face, the crossover pores would evolve synergistically, which explained the abnormal bending properties of 3D C/SiC above 1700 degrees C.
部门归属	northwestern polytech univ, natl key lab thermostruct composite mat, xian 710072, peoples r china. chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;li, jz (reprint author), northwestern polytech univ, natl key lab thermostruct composite mat, xian 710072, peoples r china;jianzhang_li@yahoo.com
关键词	3d C/sic Composite Crossover Pore Three-point-bending Structure High-temperature Mechanical Behavior Matrix Composites Silicon-carbide Fabrication Design
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WOS记录号	WOS:000248627200008
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34305
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Z. Li,S. R. Qiao,D. Han,et al. The effects of crossover pores on high temperature bending behavior of 3-dimensional braided C/SiC[J]. Science and Engineering of Composite Materials,2006,13(4):313-322.
APA	J. Z. Li,S. R. Qiao,D. Han,D. X. Li,L. T. Zhang,&L. F. Cheng.(2006).The effects of crossover pores on high temperature bending behavior of 3-dimensional braided C/SiC.Science and Engineering of Composite Materials,13(4),313-322.
MLA	J. Z. Li,et al."The effects of crossover pores on high temperature bending behavior of 3-dimensional braided C/SiC".Science and Engineering of Composite Materials 13.4(2006):313-322.