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	Microstructural characterization and mechanical properties of self-reinforced Si3N4 ceramics containing high oxynitride glass
	Luo, X. T. ; Chen, L. F. ; Huang, Q. J. ; Zhang, L. T. ; Luo XT(罗学涛) ; Chen LF(陈立富)
	2004-08
关键词	SILICON-NITRIDE FRACTURE-TOUGHNESS GRAIN-GROWTH
英文摘要	Self-reinforced Si3N4 ceramics containing high oxynitride glass have been fabricated by the control of microstructure evolution and beta-Si3N4 grain growth. The effects of the size distribution of the elongated beta-Si3N4 grains, and the beta-Si3N4 grain growth as well as the oxynitride glass chemical characteristic on the microstructure and mechanical properties were investigated. The experimental results show that the beta-Si3N4 grains in high oxynitride glass grow to elongated rod-like crystals and form the stereo-network structure. Under the sintering conditions of 1800degreesC and 60 min, a quite uniform microstructure with an average aspect ratio of 6.5 and an average of 1 mum can be obtained. A large amount of oxynitride glass phase with high nitrogen content enhances the elevated temperature fracture toughness because of its high softening temperature and high viscosity. In the present material, the crack deflection and pullout of the elongated rod-like beta-Si3N4 grains are the primary toughening mechanisms.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/59827]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Luo, X. T.,Chen, L. F.,Huang, Q. J.,et al. Microstructural characterization and mechanical properties of self-reinforced Si3N4 ceramics containing high oxynitride glass[J],2004.
APA	Luo, X. T.,Chen, L. F.,Huang, Q. J.,Zhang, L. T.,罗学涛,&陈立富.(2004).Microstructural characterization and mechanical properties of self-reinforced Si3N4 ceramics containing high oxynitride glass..
MLA	Luo, X. T.,et al."Microstructural characterization and mechanical properties of self-reinforced Si3N4 ceramics containing high oxynitride glass".(2004).

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