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为了观察蒸馏水润滑下的Ｓｉ３Ｎ４—白口铸铁摩擦面上表面膜的形成过程，在环—块磨损试验机上进行了不同磨程的磨损试验，通过扫描电镜（ＳＥＭ）对不同磨程的铸铁磨面进行了观察，对表面膜的形成机理进行了初步探讨。结果表明，当Ｓｉ３Ｎ４与白口铸铁配副摩擦时，由于铸铁中碳化物的剥落而形成剥落坑，Ｓｉ３Ｎ４磨屑嵌入剥落坑并氧化和水解，其反应产物富集于剥落坑中，脱水聚合后形成硅胶，从而在磨面形成了含硅胶的表面膜。表面膜的形成保护了陶瓷和铸铁磨面，使其变得很光滑，从而使摩擦系数降至０．０２，并使陶瓷和铸铁的磨损几乎接近于零。
In order to observe the formation process of the surface film on the friction surface of Si3N4-white cast iron under the condition of distilled water lubrication, different wear tests were carried out on the ring-block abrasion tester. The wear- The observation was made and the formation mechanism of the surface film was preliminarily discussed. The results show that when Si3N4 is mixed with white cast iron, exfoliation crater is formed due to the spalling of carbides in the cast iron. Si3N4 wear debris is embedded in the exfoliation pit and oxidized and hydrolyzed. The reaction products are enriched in the peel pits. After dehydration polymerization The formation of silica gel, which formed in the grinding surface containing silica gel film. The formation of the surface film protects the ceramic and cast iron finish making it smoother, reducing the coefficient of friction to 0.02 and making ceramic and cast iron wear almost zero.