Effects of WC particle size on densification and properties of spark plasma sintered WC–Co cermet |
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| Authors: | Shixian Zhao Xiaoyan Song Chongbin Wei Li Zhang Xuemei Liu Jiuxing Zhang |
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| Affiliation: | aCollege of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;bState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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| Abstract: | The WC–Co cermet bulks were prepared by spark plasma sintering (SPS) using powder mixtures with different-scaled WC particles. The SPS densification process was studied by calculating the current distribution between the powder sample and the die in the SPS system. The microstructures were characterized and compared for different samples by the WC grain size, Co mean free path and contiguity of WC grains. In spite of a weak effect of WC particle size on the SPS densification stages, the WC particle size plays a significant role in the homogeneity of the cermet microstructure. Good mechanical properties of the SPSed cermet were obtained with an optimized WC and Co particle-size combination. The effects of scale combination of WC and Co particles on the microstructure hence the properties of the SPSed cermet were discussed. |
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| Keywords: | WC– Co cermet Particle-size combination Spark plasma sintering Mechanical properties |
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