Abstract
Wear of six kinds of media balls during the ball milling of Si3N4 raw powder with additives was tested. The materials of the ball were α′/β′-SiAlON, β-Si3N4, high purity Al2O3, Al2O3 (HD-11), SiC and tetragonal ZrO2. The material of the least wear was α′/β′-SiAlON. The Si3N4 powder milled with SiC ball resulted in the mixture of Si3N4 with 13vol% of SiC. The powder consolidated to almost full density by the conventional gas pressure sintering.
