Articles
  • Weibull statistical analysis on Vickers hardness of immersed Al2O3 ceramics in acidic and alkaline solution
  • Sang-Cheol Jeonga, Seok-Hwan Ahnb and Ki-Woo Namc,*
  • a UR Interdisciplinary Program of Mechanical Engineering, Graduation School, Pukyong National University, Busan 48547, Korea b Department of Mechatronics, Jungwon University, Chungbuk, Korea c Department of Materials Science and Engineering, Pukyong National University, Busan 48547, Korea
Abstract
This study measured the Vickers hardness of Al2O3 ceramics, and Weibull statistical analysis was used to evaluate the reliability of the measured data. The specimens were heat-treated for 0.5 hr, 1 hr and 10 hrs at temperatures of 1473 K, 1573 K, and 1673 K. The as-received specimen and the heat treated specimen were corroded for 400 hours in acidic and alkaline solutions. The specimens were as-received specimen, corroded as-received specimen, heat treatment specimen and corroded heat treatment specimen. The specimens were measured Vickers hardness. The two-parameter Weibull probability distribution can be applied to the Vickers hardness. In the Weibull statistical analysis of the corroded Al2O3 composite ceramics, the shape parameters and scale parameters can be used to determine the dispersion and to predict the strength/ hardness.

Keywords: Al2O3 ceramics, Corrosion, Acidic solution, Alkaline solution, Vickers hardness, Weibull statistical analysis.

This Article

  • 2017; 18(7): 506-520

    Published on Jul 31, 2017