陶瓷与灰铸铁在水润滑条件下滑动摩擦学特性的研究

在Ｍ－２００环一块磨损试验机上研究了蒸馏水润滑条件下Ｓｉ３Ｎ４、Ａｌ２Ｏ３陶瓷与灰铸铁（ＨＴ）配副时的滑动摩擦磨损特性，并与这两种陶瓷和０．８％Ｃ钢（Ｔ８）配副相对比；在扫描电镜（ＳＥＭ）下对磨损后的试样表面进行了形貌观察和能谱分析。结果表明：Ｓｉ３Ｎ４／ＨＴ的摩擦系数最小，而且Ｓｉ３Ｎ４与ＨＴ的磨损率均比Ｓｉ３Ｎ４与Ｔ８配副时低得多，其原因是由于在灰铸铁表面形成了一层含石墨的氧化膜；Ａｌ２Ｏ３／ＨＴ与Ａｌ２Ｏ３／Ｔ８的摩擦系数差别不大，但灰铸铁的磨损体积小于Ｔ８。这是由于当Ａｌ２Ｏ３与ＨＴ配副时，很难在ＨＴ表面形成含石墨的表面膜，但ＨＴ中的石墨膜减轻了Ｆｅ向Ａｌ２Ｏ３表面的转移从而降低了磨损。

WATER-LUBRICATED SLIDING WEAROF CERAMICS Si3N4 AND Al_2O_3AGAINST GRAY CAST IRON

The water-lubricated sliding wear behavior of Si3N4 and Al2Oa against graycast iron is studied on block-ring wear test machine type M-200. In order to comparewith cast iron Pairings, the friction and wear tests of 0.8%C steel/ceramics were alsocarried ont. The morphology of the worn surfaces was examined under scanning electronmicroscope and microanalysis was conducted by energy-dispersive X-ray analysis. Thereaults skowed tkat:the lowest friction coefficient appears in the case of Si3N4/cast ironand the wear of Si3N4 and cast iron is lower than that of Si3aN4 and the steel in tke caseof Si3N4/steel pairings respectively. The reason is that there exists an oxide film contai-ning graphite formed on the surface of cast iron in the wear process; The friction coeffi-cient of Al2O3/cast iron and Al2O3/steel makes no difference. But the wear of gray castiron is smaller than that of steel.