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- Spark Plasma Sintering Behavior of Binderless WC Powders
- Hwan-Tae Kim, Dong-Wook Park, Ji-Soon Kim, Young-Soon Kwon, Hye-Suk Kwon, Eung-Ryul Baek
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Journal of Korean Powder Metallurgy Institute 2003;10(3):176-180
DOI: https://doi.org/10.4150/KPMI.2003.10.3.176
2School of Materials Science and Engineering, University of Ulsan
3School of Materials Science and Engineering, University of Ulsan
4School of Materials Science and Engineering, University of Ulsan
5School of Metallurgy and Materials Engineering, Yeungnam University
6School of Metallurgy and Materials Engineering, Yeungnam University
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Abstract
Pure WC powders which does not include a binder phase were consolidated by spark plasma sintering (SPS) process at 1600~1850°C for 0~30 min under 50 MPa. Microstructure alid mechanical properties of binderless WC prepared by SPS were investigated. With increasing sintering temperature, sintered density and Vickers hardness of binderless WC increased. The fracture toughness of binderless WC was 7~15 MPa m1/2 depending on the sintered density and decreased with increasing the Vickers hardness. It is found that the binderless WC prepared by SPS at 1750°C for 10 min under 50 MPa showed nearly full densification with fine-grained structure and revealed excellent mechanical properties of high hardness (~HV 2400) and considerably high fracture toughness (~7 MPa m1/2).
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