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In order to investigate the effect of surface roughness in run-in process on friction of ceramics in water, ceramics (Si 3 N 4 , SiC and Al 2 O 3 ) were rubbed against themselves from different initial surface roughness under flat-contact in distilled water. Friction coefficient and surface roughness decreased with sliding distance in all of ceramics and they reached...
By means of environmental scanning electron microscopy (ESEM), an in situ observation technique was developed to observe the agglomeration process of wear particles of silicon nitride, silicon carbide and alumina and to study the effect of water vapor on the agglomeration of wear particles. The results show that the size of the deposit of wear particles becomes smaller with increasing water vapor...
The overall objective of this study is to introduce a wear map of ceramics which shows the regions of dominant wear modes observed in a wide range of materials and operating conditions. Furthermore, from the wear map, common necessary conditions for the application of various ceramics as wear-resistant tribe-materials in a wide range of operating conditions are discussed. For this purpose, friction...
The experimental study of heavily loaded lubricated Si 3 N 4 -steel and SiC-steel friction pairs has been carried out. Interfacial conditions were changed from boundary to mixed lubrication with an appreciable effect of elastohydrodynamic separation.It was found that the running-in process in the given friction pair is very sensitive to the initial lubricating conditions. The initial...
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