Anisotropic deformation and damage behavior of brittle-ductile laminated composites in bending at high temperature

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	Anisotropic deformation and damage behavior of brittle-ductile laminated composites in bending at high temperature
	Y. W. Bao; Y. C. Zhou
	2005
发表期刊	Journal of Composite Materials
ISSN	0021-9983
卷号	39 期号:2 页码:147-162
摘要	Brittle-ductile alternate laminates with strong interfaces, Al2O3-Ti3SiC2 multilayer composites, are fabricated by hot-pressing thin Al2O3 tapes coated with a mixture of titanium, silicon, and graphite powders at 1550degreesC. The damage evolution and subcritical growth of macrocracks in these novel composites are investigated by three-point bending tests at high temperatures. By comparing the mechanical response in different loading directions, the anisotropic mechanical properties of the laminated beams are revealed. The experimental results show that, with the stress redistribution and the neutral axis shift toward the compressive surface during the creep damage, increased cracks occur in the Al2O3 layers and slowly extend toward the neutral axis without brittle fracture. It is demonstrated that the creep damage of the Al2O3-Ti3SiC2-laminated composites in bending is governed by a combination of stress relaxation in Ti3SiC2 layers and subcritical crack growth in Al2O3 layers. This result implies that controllable subcritical crack growth and crack arrest in brittle ceramics could be accomplished by means of a ductile-brittle joined structure. This prediction is confirmed by using a bending test on an aluminum beam with a glass coating bonded on the side surface.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;bao, yw (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Al2o3-ti3sic2 Laminated Composites Anisotropic Stiffness Subcritical Crack Growth Creep Damage Siliconized Silicon-carbide Ceramics Creep Fracture Ti3sic2 Alumina Propagation Cavitation Recovery Coarse
URL	查看原文
WOS记录号	WOS:000226972800003
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34794
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. W. Bao,Y. C. Zhou. Anisotropic deformation and damage behavior of brittle-ductile laminated composites in bending at high temperature[J]. Journal of Composite Materials,2005,39(2):147-162.
APA	Y. W. Bao,&Y. C. Zhou.(2005).Anisotropic deformation and damage behavior of brittle-ductile laminated composites in bending at high temperature.Journal of Composite Materials,39(2),147-162.
MLA	Y. W. Bao,et al."Anisotropic deformation and damage behavior of brittle-ductile laminated composites in bending at high temperature".Journal of Composite Materials 39.2(2005):147-162.