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Approaching diamond’s theoretical elasticity and strength limits

Author

Listed:
  • Anmin Nie

    (Yanshan University)

  • Yeqiang Bu

    (Zhejiang University)

  • Penghui Li

    (Yanshan University)

  • Yizhi Zhang

    (Zhejiang University
    Zhejiang University)

  • Tianye Jin

    (Center for Precision Engineering, Harbin Institute of Technology)

  • Jiabin Liu

    (Zhejiang University)

  • Zhang Su

    (Yanshan University)

  • Yanbin Wang

    (University of Chicago)

  • Julong He

    (Yanshan University)

  • Zhongyuan Liu

    (Yanshan University)

  • Hongtao Wang

    (Zhejiang University
    Zhejiang University)

  • Yongjun Tian

    (Yanshan University)

  • Wei Yang

    (Zhejiang University
    Zhejiang University)

Abstract

Diamond is the hardest natural material, but its practical strength is low and its elastic deformability extremely limited. While recent experiments have demonstrated that diamond nanoneedles can sustain exceptionally large elastic tensile strains with high tensile strengths, the size- and orientation-dependence of these properties remains unknown. Here we report maximum achievable tensile strain and strength of diamond nanoneedles with various diameters, oriented in , and -directions, using in situ transmission electron microscopy. We show that reversible elastic deformation depends both on nanoneedle diameter and orientation. -oriented nanoneedles with a diameter of 60 nm exhibit highest elastic tensile strain (13.4%) and tensile strength (125 GPa). These values are comparable with the theoretical elasticity and Griffith strength limits of diamond, respectively. Our experimental data, together with first principles simulations, indicate that maximum achievable elastic strain and strength are primarily determined by surface conditions of the nanoneedles.

Suggested Citation

  • Anmin Nie & Yeqiang Bu & Penghui Li & Yizhi Zhang & Tianye Jin & Jiabin Liu & Zhang Su & Yanbin Wang & Julong He & Zhongyuan Liu & Hongtao Wang & Yongjun Tian & Wei Yang, 2019. "Approaching diamond’s theoretical elasticity and strength limits," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13378-w
    DOI: 10.1038/s41467-019-13378-w
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    Cited by:

    1. Wenqing Zhu & Zhi Li & Hua Shu & Huajian Gao & Xiaoding Wei, 2024. "Amorphous alloys surpass E/10 strength limit at extreme strain rates," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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