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Densification behavior and grain growth of zirconia powder compacts at high temperature

지르코니아 분말 성형체의 고온 치밀화 거동과 결정립 성장

  • Kim, H.G (Graduate School of Pohang University) ;
  • Kim, K.T (Dept. of Mechanical Engineering, Pohang University of Science and Technology)
  • 김홍기 (포항공과대학교 대학원) ;
  • 김기태 (포항공과대학교 기계공학과)
  • Published : 1997.08.01

Abstract

Densification behavior and grain growth of zirconia powder compacts are investigated under high temperature. Experimental data are obtained for zirconia powder under pressureless sintering, sinter forging and hot isostatic pressing. The constitutive equations by Kwon et al. are used for diffusional creep and grain growth. The constitutive equations by McMeeking and co-workers are also included to study the effect of power-law creep. These constitutive equations are implemented into a finite element program (ABAQUS) to investigate the friction effect during sinter forging and the canning effect during hot isostatic pressing. The agreements between experimental data and finite element results are very good in pressureless sintering and hot isostatic pressing, but not as good in sinter forging.

Keywords

Zirconia;Constitutive Model;Diffusional Creep;Power-law Creep;Densification;Grain Growth

References

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