Preparation of Tungsten Boride Ceramic by Pressureless Sintering

IMR OpenIR

	Preparation of Tungsten Boride Ceramic by Pressureless Sintering
其他题名	Preparation of Tungsten Boride Ceramic by Pressureless Sintering
	Cao XiaoZhou; Wang Chao; Xue XiangXin; Yang He
	2014
发表期刊	JOURNAL OF INORGANIC MATERIALS
ISSN	1000-324X
卷号	29 期号:5 页码:498-502
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.
关键词	SOLID-SOLUTIONS DENSIFICATION DECOMPOSITION MOLYBDENUM DIBORIDE WB2 ceramic pressureless sintering mechanical properties
收录类别	CSCD
语种	英语
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]
CSCD记录号	CSCD:5137940
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/151294
专题	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.