Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures

Jaehun Cho; Jin Li; Han Wang; Qiang Li; Zhe Fan; A.K. Mukherjee; W. Rheinheimer; Haiyan Wang; X. Zhang

doi:10.1080/21663831.2019.1575924

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Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures

Original Report | 更新时间：2026-08-19

- Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures
- Materials Research Letters Vol. 7, Issue 5, Pages: 194-202(2019)
- 作者机构：
  
  1. School of Materials Engineering Purdue University West Lafayette
  2. Oak Ridge National Laboratory Oak Ridge
  3. Department of Chemical Engineering & Materials Science University of California Davis
  4. School of Materials Engineering Purdue University West Lafayette IN USA
  5. School of Electrical and Computer Engineering Purdue University West Lafayette
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2019.1575924
  CLC：
- Online First：12 February 2019，
  
  Published：2019
- 稿件说明：
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Jaehun Cho, Jin Li, Han Wang, et al. Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures[J]. Materials Research Letters, 2019, 7(5): 194-202.
DOI：

Jaehun Cho, Jin Li, Han Wang, et al. Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures[J]. Materials Research Letters, 2019, 7(5): 194-202. DOI： 10.1080/21663831.2019.1575924.

摘要

Abstract

BSTRACTFlash sintering has received wide attention lately due to its ultrafast densification process at low sintering temperature. However

the deformability of flash-sintered ceramics remains poorly understood. Yttria-stabilized zirconia (YSZ) was processed by flash sintering to study deformation mechanism. Transmission electron microscopy studies show that the flash-sintered YSZ contains ultrafine grains and dislocations. Strain rate jump tests at elevated temperature by

in-situ

microcompression indicate the existence of a large threshold stress. The activation energy of deformation is ∼145 kJ/mol

similar to the activation energy for oxygen vacancy migration. The deformation mechanisms of the flash-sintered YSZ at elevated temperatures are discussed.

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c Department of Materials Science and Engineering University of Hong Kong Hong Kong People's Republic of China

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