Effect of Cold Cyclic Compaction on Densification of <TEX>$Al_2O_3$</TEX> Powder/SiC Whisker Composite

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J. Korean Ceram. Soc. > Volume 34(3); 1997 > Article

Journal of the Korean Ceramic Society 1997;34(3): 296.

$Al_2O_3$분말과 SiC 휘스커 복합체의 치밀화에 미치는 상온 반복 압축의 영향

최승완, 김기태

포항공과대학 기계공학과

Effect of Cold Cyclic Compaction on Densification of $Al_2O_3$ Powder/SiC Whisker Composite

ABSTRACT

The effect of cold cyclic compaction on densification of SiC whisker/Al2O3 composite was investigated. Re-lative density of the compact increased as the number of cycle and the compaction pressure increased and the bias pressure decreased. The rate of loading and unloading and the frequency of cold cyclic compaction did not affect much on sliding and rearrangement of the particles. Fracture of SiC whisker was hardly ob-served during cold cyclic compaction and the direction of whisker was randomly oriented throughout the compact regardless of the direction of compaction. Thus, cold cyclic compaction may be an efficient method to densify SiC whisker/Al2O3 composite.

Key words: Alumina, Whisker, Cold cyclic compaction, Green density