Tribological characteristics and self-repairing effect of hydroxy-magnesium silicate on various surface roughness friction pairs |
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Authors: | Bo Zhang Bin-shi Xu Yi Xu and Bao-sen Zhang |
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Affiliation: | (1) State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China;(2) Graduate School of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China; |
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Abstract: | Tribological characteristics and self-repairing effect of hydroxy-magnesium silicate (HMS) dispersed in lubricant oil on steel-to-steel
friction pairs with various surface roughness were analyzed. The friction-reduction, anti-wear and self-repairing performance
of various surface roughness friction pairs were examined by friction testing machine. An operation comparison was made between
SJ10W-40 lubricant with and without HMS. The surface morphology and elementary composition of the grinding cracks were analyzed
by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The results show that the lubrication state
changes from boundary lubrication into mixed lubrication after operation in lubricant with HMS. The friction-reduction, anti-wear
and self-repairing performance of the friction pairs with various surface roughness are distinctly different. There is a repairing
film whose material is different from substrate material on the grinding cracks. In addition, Si, Mg, O, Al and other elements
are deposited on the repairing film which contains nanocrystals of these elements. And HMS self-repairing material possesses
superior performance of friction-reduction, anti-wear and self-repairing effects. |
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Keywords: | hydroxy-magnesium silicate surface roughness friction wear self-repairing |
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