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Microstructure and Compression Strength of W/HfC Composites Synthesized by Plasma Activated Sintering

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Abstract

In this work, W/HfC composite materials were synthesized using plasma activated sintering. The influence of the sintering temperature and HfC weight fraction on the relative density, microstructure and compression strength were investigated. The results demonstrated that the sintering temperature and the HfC content significantly affected the microstructure of W/HfC composites. Moreover, the grain size of the W/HC composites decreased and the mechanical properties were improved remarkably due to the addition of HfC. The majority of HfC particles reacted with oxygen impurities to generate HfO2, which purified the grain boundaries and refined the grain size of the W matrix. The optimum content of HfC is 2 wt%, at which a high compressive strength of 1.98 GPa and a high strain of 34.7% were obtained.

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Acknowledgements

The work was supported by the National Natural Science Foundation of China (No. 51521001 and 51572208), the “111” Project (Grant No. B13035), the National Key R&D Program of China (2018YFB0905600), the Nature Science Foundation of the Hubei Province (No. 2016CFA006) and the Joint Fund (No. 6141A02022223).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, People’s Republic of China

    Jian Zhang, Shuai Ma, Jiawen Zhu, Kejia Kang, Guoqiang Luo, Qiang Shen & Lianmeng Zhang

  2. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, People’s Republic of China

    Chuandong Wu

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  1. Jian Zhang
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  2. Shuai Ma
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Correspondence to Guoqiang Luo.

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Zhang, J., Ma, S., Zhu, J. et al. Microstructure and Compression Strength of W/HfC Composites Synthesized by Plasma Activated Sintering. Met. Mater. Int. 25, 416–424 (2019). https://doi.org/10.1007/s12540-018-0190-8

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  • DOI: https://doi.org/10.1007/s12540-018-0190-8

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