期刊
MATERIALS SCIENCE AND TECHNOLOGY
卷 31, 期 14, 页码 1749-1756出版社
TAYLOR & FRANCIS LTD
DOI: 10.1179/1743284714Y.0000000753
关键词
Tungsten carbide; Binderless; SPS; Hardness
资金
- National Natural Science Foundation of China [51171117, 51172276]
- Shenzhen Science and Technology Research Grant [JCYJ20120613115247045, JCYJ20130329104944356]
The phases, microstructures and mechanical properties of binderless WC bulk materials prepared by the spark plasma sintering technique were investigated systematically. The addition of carbon was added to eliminate the impurity phase W2C. The relative density, Vickers hardness and grain size increase obviously with increasing sintering temperature, but increase weakly with increasing pressure or sintering time. The high relative density of 99.1%, HV30 of 27.5 GPa and fracture toughness K-IC of 4.5 MPa m(1/2) of pure binderless WC bulk with a grain size of 400 nm was obtained by sintering the WC powders with a particle size of 200 nm and the addition of 0.63 wt-%C at 1800 degrees C for 6 min under 70 MPa.
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