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Contribution of boundary non-stoichiometry to the lower-temperature plasticity in high-pressure sintered boron carbide

Author

Listed:
  • Haiyue Xu

    (Wuhan University of Technology)

  • Wei Ji

    (Wuhan University of Technology
    University of Oxford)

  • Jiawei Jiang

    (University of Oxford)

  • Junliang Liu

    (University of Oxford)

  • Hao Wang

    (Wuhan University of Technology)

  • Fan Zhang

    (Wuhan University of Technology
    Wuhan University of Technology Xiangyang Demonstration Zone)

  • Ruohan Yu

    (Wuhan University of Technology)

  • Bingtian Tu

    (Wuhan University of Technology)

  • Jinyong Zhang

    (Wuhan University of Technology)

  • Ji Zou

    (Wuhan University of Technology)

  • Weimin Wang

    (Wuhan University of Technology)

  • Jinsong Wu

    (Wuhan University of Technology
    Wuhan University of Technology)

  • Zhengyi Fu

    (Wuhan University of Technology)

Abstract

The improvement of non-oxide ceramic plasticity while maintaining the high-temperature strength is a great challenge through the classical strategy, which generally includes decreasing grain size to several nanometers or adding ductile binder phase. Here, we report that the plasticity of fully dense boron carbide (B4C) is greatly enhanced due to the boundary non-stoichiometry induced by high-pressure sintering technology. The effect decreases the plastic deformation temperature of B4C by 200 °C compared to that of conventionally-sintered specimens. Promoted grain boundary diffusion is found to enhance grain boundary sliding, which dominate the lower-temperature plasticity. In addition, the as-produced specimen maintains extraordinary strength before the occurrence of plasticity. The study provides an efficient strategy by boundary chemical change to facilitate the plasticity of ceramic materials.

Suggested Citation

  • Haiyue Xu & Wei Ji & Jiawei Jiang & Junliang Liu & Hao Wang & Fan Zhang & Ruohan Yu & Bingtian Tu & Jinyong Zhang & Ji Zou & Weimin Wang & Jinsong Wu & Zhengyi Fu, 2023. "Contribution of boundary non-stoichiometry to the lower-temperature plasticity in high-pressure sintered boron carbide," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40581-7
    DOI: 10.1038/s41467-023-40581-7
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    References listed on IDEAS

    as
    1. K. Madhav Reddy & J.J. Guo & Y. Shinoda & T. Fujita & A. Hirata & J.P. Singh & J.W. McCauley & M.W. Chen, 2012. "Enhanced mechanical properties of nanocrystalline boron carbide by nanoporosity and interface phases," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
    2. Quan Huang & Dongli Yu & Bo Xu & Wentao Hu & Yanming Ma & Yanbin Wang & Zhisheng Zhao & Bin Wen & Julong He & Zhongyuan Liu & Yongjun Tian, 2014. "Nanotwinned diamond with unprecedented hardness and stability," Nature, Nature, vol. 510(7504), pages 250-253, June.
    3. Y. Waku & N. Nakagawa & T. Wakamoto & H. Ohtsubo & K. Shimizu & Y. Kohtoku, 1997. "A ductile ceramic eutectic composite with high strength at 1,873 K," Nature, Nature, vol. 389(6646), pages 49-52, September.
    4. Xiaoyan Li & Yujie Wei & Lei Lu & Ke Lu & Huajian Gao, 2010. "Dislocation nucleation governed softening and maximum strength in nano-twinned metals," Nature, Nature, vol. 464(7290), pages 877-880, April.
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