Attrition Milling and Reaction-Sintering of the Oxide-Metal Mixed Powders: I. Milling Behavior as the Powder Characteristics

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J. Korean Ceram. Soc. > Volume 31(3); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(3): 337.

산화물과 금속 복합 분말의 Attrition Milling 및 반응소결: I. 분말의 특성에 따른 분쇄 거동

황규홍, 박정환, 윤태경

경상대학교 무기재료공학과

Attrition Milling and Reaction-Sintering of the Oxide-Metal Mixed Powders: I. Milling Behavior as the Powder Characteristics

ABSTRACT

The reaction-sintered alumina and zirconia-alumina ceramics having low firing shrinkage were prepared from the Al/Al2O3 or Al/ZrO2(Ca-PSZ) powder mixtures via the attrition milling. And in this milling process the effect of the characteristics of used powders was investigated. Attrition milling was much more effective in reducing the particle size of ceramic/metal mixed powders than ball milling. Powder mixtures of flake-type Al with coarse alumina was much more effectively comminuted by the attrition milling than the mixtures of globular-type Al with coarse alumina powders. And coarse alumina than fine alumina was much more beneficial in cutting and reducing the ductile Al particles. In the contrary to Al/Al2O3 powder mixtures, Al/ZrO2 powder mixtures was not effectively comminutd. But whether using the alumina ball media or attrition milled with Al2O3 powder rather than Al, the milling efficiency was much more increased.