Microstructure and fracture behavior of an Al2O3-ZrO2-SiCw ceramic composite

The microstructure, mechanical properties, fracture behaviour and toughening mechanisms of an Al2O3-ZrO2-SiCw composite were investigated. The Al2O3 matrix was toughened by both ZrO2 and SiCw, the mechanism being complex and dependent upon the interfacial strength and degree of t to m transformation...

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Published in:Ceramics international 1994, Vol.20 (2), p.91-97
Main Authors: LEI, T. C, GE, Q. L, ZHOU, Y, WANG, S. H
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
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description The microstructure, mechanical properties, fracture behaviour and toughening mechanisms of an Al2O3-ZrO2-SiCw composite were investigated. The Al2O3 matrix was toughened by both ZrO2 and SiCw, the mechanism being complex and dependent upon the interfacial strength and degree of t to m transformation of ZrO2. The SiCw and ZrO2 also improved the fracture strength of the material. The load-displacement curve was sawtoothed in shape, attributed to the repeated initiation and stopping of crack propagation by whiskers. A model of the toughening mechanisms for ZrO2 and SiCw is discussed. 16 refs.
doi_str_mv 10.1016/0272-8842(94)90064-7
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subjects Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
title Microstructure and fracture behavior of an Al2O3-ZrO2-SiCw ceramic composite
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