High Temperature Densification Forming of Alumina Powder—Constitutive Model and Experiments

[+] Author and Article Information
Y. S. Kwon, K. T. Kim

Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea

J. Eng. Mater. Technol 118(4), 448-455 (Oct 01, 1996) (8 pages) doi:10.1115/1.2805941 History: Received June 03, 1995; Revised March 17, 1996; Online November 27, 2007


Densification and grain growth of alumina powder compacts were investigated under pressureless sintering, sinter forging, and hot pressing. A set of constitutive equations by Kwon et al. was used to predict densification under diffusional creep. A novel grain growth equation is proposed by generalizing the grain growth model of Wilkinson and Cáceres to predict grain growth during densification forming process of ceramic powders under general loading states. Material parameters in the constitutive equations were determined from experimental data under pressureless sintering and sinter forging. Theoretical predictions by using the constitutive equations for creep densification and grain growth were compared with experimental data of alumina powder compacts.

Copyright © 1996 by The American Society of Mechanical Engineers
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