Densification of Aggregated Alumina Powder under Cyclin Compaction

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J. Korean Ceram. Soc. > Volume 29(2); 1992 > Article

Journal of the Korean Ceramic Society 1992;29(2): 136.

반복압축하의 응집된 알루미나 분말의 치밀화

김기태, 손건석, 서정

포항공과대학 기계공학과

Densification of Aggregated Alumina Powder under Cyclin Compaction

ABSTRACT

The effects of cyclic stress, frequency and bias-pressure on densification of Al2O3 powder cyclic compaction are investigated. The effect of frequency was not significant on densification of Al2O3 powder under cyclic compaction. The higher the cyclic stress and the lower the bias pressure, the higher densification was achieved. To obtain a higher densification, cyclic compaction was more efficient than 1 stroke compaction. A densification equation was proposed to describe an cyclic time dependent pressure-volume relation for Al2O3 powder under cyclic compaction. This equation was obtained empirically, based on the pressure-volume equation proposed by Cooper and Eaton, the time dependent densification equation by Kim and Suh and experimental data for Al2O3 powder under cyclic compaction. The agreement between the proposed equation and experimental data for Al2O3 powder under cyclic compaction was very good.