Preparation of Tungsten Boride Ceramic by Pressureless Sintering

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	Preparation of Tungsten Boride Ceramic by Pressureless Sintering
	Cao XiaoZhou; Wang Chao; Xue XiangXin; Yang He
刊名	JOURNAL OF INORGANIC MATERIALS
	2014
卷号	29 期号:5 页码:498-502
关键词	SOLID-SOLUTIONS DENSIFICATION DECOMPOSITION MOLYBDENUM DIBORIDE WB2 ceramic pressureless sintering mechanical properties
ISSN号	1000-324X
其他题名	Preparation of Tungsten Boride Ceramic by Pressureless Sintering
英文摘要	WB2 ceramic was prepared by a two-step sintering method. Firstly, WB2 powder was synthesized by solid phase reaction using the mixed boron and tungsten powder as raw materials at high temperature. Secondly, WB2 ceramic was prepared by pressureless sintering using the above synthesized powder. The effect of boron/tungsten molar ratio on the phase composition of synthesized product, and the effect of temperature on the microstructure and mechanical properties of WB2 ceramic were investigated. The results showed that phase-pure WB2 could be obtained with B/W molar ratio of 2.5. The apparent porosity decreased, the relative density increased and the mechanical properties were improved greatly with the increase of sintering temperature. When the sintering temperature was up to 1800 degrees C, the porosity, relative density, flexural strength and Vickers micro-hardness of WB2 ceramic were 5.2%, 86.0%, 72 MPa and 2088.5 MPa, respectively. The main fracture model of WB2 ceramic was changed from intergranular fracture to transgranular fracture.
资助项目	[Major Program of National Natural Science Foundation of China] ; [Fundamental Research Funds for the Central Universities] ; [National Natural Science Foundation of China]
语种	英语
CSCD记录号	CSCD:5137940
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/151293]
专题	金属研究所_中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Cao XiaoZhou,Wang Chao,Xue XiangXin,et al. Preparation of Tungsten Boride Ceramic by Pressureless Sintering[J]. JOURNAL OF INORGANIC MATERIALS,2014,29(5):498-502.
APA	Cao XiaoZhou,Wang Chao,Xue XiangXin,&Yang He.(2014).Preparation of Tungsten Boride Ceramic by Pressureless Sintering.JOURNAL OF INORGANIC MATERIALS,29(5),498-502.
MLA	Cao XiaoZhou,et al."Preparation of Tungsten Boride Ceramic by Pressureless Sintering".JOURNAL OF INORGANIC MATERIALS 29.5(2014):498-502.