ぜい性材料の固体微粒子によるージョン(第9報) : Al_2O_3-SiC粒子複合体のージョン摩耗

概要

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Al_2O_3 composites containing 20-50 volume% of dispersed SiC particles of 0.28, 0.48 or 0.65 μm in average diameter were hot-pressed at 1850% for 1 h under an applied pressure of 25 MNm^<-2>. The SiC particles prevented the densification of Al_2O_3, more pronounced with smaller particles. Composites containing more than 40 vol% SiC particles were not fully densified with the SiC particles of 0.28 and 0.48 μm. On the other hand, the composite containing 50 vol% 0.65 μm-SiC particles sintered to a relative density over 99 % . The erosive wear was tested using SiC and Al_2O_3 abrasives. The erosion rate of the composites depended largely on their hardness. The Vickers hardness of a composite composed of 50 vol% 0.65 μm-SiC particles was 26 GNm^<-2> and its erosion rate was 5.3 X 10^<-4> cm^3/cm^3.
社団法人日本セラミックス協会の論文
1988-07-01