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Preparation of Tungsten Boride Ceramic by Pressureless Sintering
Alternative TitlePreparation of Tungsten Boride Ceramic by Pressureless Sintering
Cao XiaoZhou; Wang Chao; Xue XiangXin; Yang He
2014
Source PublicationJOURNAL OF INORGANIC MATERIALS
ISSN1000-324X
Volume29Issue:5Pages:498-502
AbstractWB2 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.
KeywordSOLID-SOLUTIONS DENSIFICATION DECOMPOSITION MOLYBDENUM DIBORIDE WB2 ceramic pressureless sintering mechanical properties
Indexed ByCSCD
Language英语
Funding Project[Major Program of National Natural Science Foundation of China] ; [Fundamental Research Funds for the Central Universities] ; [National Natural Science Foundation of China]
CSCD IDCSCD:5137940
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/151294
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
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.
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