Dynamic observation of fracture process in laminated ceramic matrix composites

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	Dynamic observation of fracture process in laminated ceramic matrix composites
	Zhou Y; Lu XN; Yuan GJ; Cheng DM; Wu XR
会议录名称	SAE Technical Papers
	2001
会议名称	10th Congresso e Exposicao Internacionais da Tecnologia da Mobilidade
会议日期	November 19, 2001 - November 22, 2001
会议地点	Sao Paulo, Brazil
摘要	Laminated ceramic composite is a new type of material developed in recent years to improve the mechanical properties of structural ceramics. Gel casting and hot-pressure sintering technologies were used to obtain the laminated SiC/BN-Al2O3 composite. Mechanical properties of the laminated composite and monolithic SiC ceramic were compared, and the fracture toughness of the laminated composite is nearly one times higher than that of the monolithic ceramic. Dynamic process of crack propagation in laminated composite was observed in situ by SEM. The interfacial crack initiate first in interlayer near to the notch tip, and then the through layer crack formed in matrix layer at the notch tip. After the through layer crack grows across the first matrix layer, it can be deflected by the interlayer and becomes an interfacial crack again. The through layer crack and the interfacial crack are generated alternately until the failure of the composite. The load / displacement plot of laminated material possess several peaks, and each peak is caused by one propagation of the through layer crack. Toughening mechanisms of the laminated composite include crack deflection, interfacial crack, through layer branch crack and parallel main crack. Copyright © 2001 Society of Automotive Engineers, Inc.
关键词	Branch Crack Crack Deflections Displacement Plots Dynamic Observation Dynamic Process Fracture Process Gel Casting In-situ Interfacial Cracks Laminated Ceramic Composites Laminated Ceramics Laminated Materials Main Crack Matrix Layers Monolithic Ceramics Sic Ceramics Toughening Mechanisms
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收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60249
专题	力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Zhou Y,Lu XN,Yuan GJ,et al. Dynamic observation of fracture process in laminated ceramic matrix composites[C]SAE Technical Papers,2001.

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