Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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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
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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.

비커스 경도 시험은 모든 재료에 적용할 수 있으며, 경도 시험 중에서 가장 광범위하게 사용된다. 경도는 기계적 성질을 평가하는 하나의 확률변수로 볼 수 있다. 본 연구는 $ZrO_2$ 단상 세라믹스와 $TiO_2$ 첨가량에 따르는 $ZrO_2/SiC$ 복합 세라믹스의 굽힘강도와 비커스 경도의 통계적 성질을 조사하였다. 굽힘강도와 비커스 경도는 와이블 확률 분포를 잘 따랐다. 척도 및 형상 파라메터는 $ZrO_2$ 모재 세라믹스, $ZrO_2/SiC/TiO_2$ 모재 세라믹스 및 이들을 열처리한 세라믹스를 사용하여 평가하였다. 또한 압입하중의 증가에 따른 영향도 평가하였다.

Keywords

References

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