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High temperature deformability of ductile flash-sintered ceramics via in-situ compression

Author

Listed:
  • Jaehun Cho

    (Purdue University)

  • Qiang Li

    (Purdue University)

  • Han Wang

    (Purdue University)

  • Zhe Fan

    (Oak Ridge National Laboratory)

  • Jin Li

    (Purdue University)

  • Sichuang Xue

    (Purdue University)

  • K. S. N. Vikrant

    (Purdue University)

  • Haiyan Wang

    (Purdue University
    Purdue University)

  • Troy B. Holland

    (Colorado State University)

  • Amiya K. Mukherjee

    (University of California)

  • R. Edwin García

    (Purdue University)

  • Xinghang Zhang

    (Purdue University)

Abstract

Flash sintering has attracted significant attention as its remarkably rapid densification process at low sintering furnace temperature leads to the retention of fine grains and enhanced dielectric properties. However, high-temperature mechanical behaviors of flash-sintered ceramics remain poorly understood. Here, we present high-temperature (up to 600 °C) in situ compression studies on flash-sintered yttria-stabilized zirconia (YSZ). Below 400 °C, the YSZ exhibits high ultimate compressive strength exceeding 3.5 GPa and high inelastic strain (~8%) due primarily to phase transformation toughening. At higher temperatures, crack nucleation and propagation are significantly retarded, and prominent plasticity arises mainly from dislocation activity. The high dislocation density induced in flash-sintered ceramics may have general implications for improving the plasticity of sintered ceramic materials.

Suggested Citation

  • Jaehun Cho & Qiang Li & Han Wang & Zhe Fan & Jin Li & Sichuang Xue & K. S. N. Vikrant & Haiyan Wang & Troy B. Holland & Amiya K. Mukherjee & R. Edwin García & Xinghang Zhang, 2018. "High temperature deformability of ductile flash-sintered ceramics via in-situ compression," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04333-2
    DOI: 10.1038/s41467-018-04333-2
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