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Determining Mechanical Properties of ZrO2 Composite Ceramics by Weibull Statistical Analysis

와이블 통계 해석에 의한 ZrO2 복합 세라믹스의 기계적 특성

  • Kim, Seon Jin (Dept. of Mechanical Design Engineering, Pukyong Nat'l Univ.) ;
  • Kim, Dae Sik (TFT, Hi Air Korea, Co., Ltd.) ;
  • Nam, Ki Woo (Dept. of Materials Science and Engineering, Pukyong Nat'l Univ.)
  • Received : 2015.03.02
  • Accepted : 2015.07.16
  • Published : 2015.10.01

Abstract

The Vickers test can be used for all types of materials, and it has one of the widest scales among hardness tests. The hardness may be considered as a probability variable when evaluating the mechanical properties of materials. In this study, we investigate the statistical properties of the bending strength and Vickers hardness in $ZrO_2$ monolithic and $ZrO_2/SiC$ composites depending on the amount of $TiO_2$ additives. The bending strength and Vickers hardness were found to agree well with the Weibull probability distribution. We evaluate the scale parameter and shape parameter in as-received $ZrO_2$ and $ZrO_2/SiC/TiO_2$ ceramics, as well as their heat treated ceramics. We also evaluate the parameters in accordance with the increase in in the indentation load.

Keywords

Weibull Statistical Analysis;Bending Strength;Vickers Hardness;$ZrO_2$ Monolithic Ceramics;$ZrO_2$ Composite Ceramics;$TiO_2$

References

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