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J. Korean Ceram. Soc. > Volume 30(2); 1993 > Article
Journal of the Korean Ceramic Society 1993;30(2): 157.
알루미나 분말 기지혼합체의 상온 반복압축 후 가압소결 -상온 반복압축 효과-
손건석, 서정, 박병학1, 김기태
포항공과대학 기계공학과
Hot Pressing after Cold Cyclic Compaction of Alumina Powder Matrix Mixtures -Effects of Cold Cyclic Compaction-
Hot pressing after cold cyclic compaction of Al2O3 powder mixtures containing SiC whiskers or Al2O3 short fibers is studied with emphasis on the effects of cold cyclic compaction. The green density of the mixtures increases as the cycle number increases and the cyclic pressure becomes higher. The higher green density is also obtained by cold cyclic compaction with the lower pressrue than a single stroke cold compaction. To achieve a higher densification during hot pressing, cold cyclic compaction before hot pressing is more efficient compared to the conventional hot pressing process (without cold cyclic compaction). Moreover, a low cyclic pressure did not affect on toughening mechanism by whisker reinforcement.
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