【摘 要】
：
Nano-scale BN-C-silicone oil composite colloid was prepared by planetary ball mill with wet grinding techniques.Lots of frictional experiments with GCr15 and 35CrMo as frictional pairs were conducted
【机 构】
：
Tribology Institute,Wuhan University of Technology,Wuhan 430070,China
【出 处】
：
Fifth International Conference on Surface Engineering(第五届表面工
论文部分内容阅读
Nano-scale BN-C-silicone oil composite colloid was prepared by planetary ball mill with wet grinding techniques.Lots of frictional experiments with GCr15 and 35CrMo as frictional pairs were conducted under a wide range of temperature (from ambient temperature to 300 ℃) by using a pin-plate friction and wear tester.The Lubricating properties of the colloid are evidently improved.The experiments show that the frictional coefficient of the colloid is lower than that of pure silicone oil at both ambient temperature and high temperature.For example,at ambient temperature,the frictional coefficients (f) of the BN-C-silicone oil composite colloid and pure silicone oil are respectively about 0.05 and 0.18,at 300 ℃,the f value of the BN-C-silicone oil composite colloid and pure silicone oil are about 0.13 and 0.36,respectively.The characteristic of the worn surface film was investigated by using SEM.The research shows that on the worn surface,some nano BN-C particles fill the concave zone and part of the particles are dispersed in the surface film.BN-C particles play a role as small balls,which makes the boundary lubricity of the silicone oil improved.Finally,based on the model proposed by T.A.Stolarski,the rupture ratio of the lubricating film was discussed to issue why BN-C-silicone oil composite colloid has lower frictional coefficient even at high temperature.
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