潤滑油成分に対する選択性を有するセラミックスの作製と評価

抄録

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.