Knowledge Management System of Institue of Mechanics, CAS
| Dynamic observation of fracture process in laminated ceramic matrix composites | |
Zhou Y; Lu XN ; Yuan GJ; Cheng DM; Wu XR
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| Source Publication | SAE Technical Papers |
| 2001 | |
| Conference Name | 10th Congresso e Exposicao Internacionais da Tecnologia da Mobilidade |
| Conference Date | November 19, 2001 - November 22, 2001 |
| Conference Place | Sao Paulo, Brazil |
| Abstract | 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. |
| Keyword | 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 |
| URL | 查看原文 |
| Indexed By | EI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/60249 |
| Collection | 力学所知识产出(1956-2008) |
| Recommended Citation 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. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| CaEi008.pdf（321KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
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