Fabricatation and Evaluation of Ceramics Having Selectivity for the Additives in Lubricant Oil

In order to obtain a material with excellent sliding properties under normal oil-lubrication, several kinds of basic experiments on both raw powders and sintered bodies, as follows: 1) measurement of the degree of adhesion of calcium-sulphonate to the surface of powders and contact angle measurement of oil on sintered bodies were done. And those experiments revealed that CeO2 added Al2O3/ZrO2 ceramics showed the most promising performance, 2) measurement of friction coefficient showed that CeO210mass% added Al2O3/ZrO2 had a much lower frictional coefficient than Si3N4 based ceramics and cast iron under mixed lubricating conditions. It was confirmed that CeO2 added Al2O3/ZrO2 ceramics was less sensitive to calcium-sulphonate, which is a widely used detergent-dispersant ingredient.