WEAR OF COMPOSITE MATERIALS WITH ALUMINA AND ZIRCONIA MATRICES IN DIFFERENT ENVIRONMENTS OF WORK

摘要

The paper presents the results of investigations on abrasive wear of a group of sintered composite materials basing on zirconia or alumina matrix containing oxide or carbide inclusions. Investigations were performed for the composites with dispersed inclusions (particulate composites). They were also made for materials with continuous phases with comparable content. In such systems the word "matrix" loose its meaning. The composites with continuous phases were investigated in two- and three-phase case.The abrasive wear was performed using coarse SiC grains in both,dry and wet environments. The composite microstructures were described. Microstructural parameters were compared to the results of wear and prophilographic tests.