Comparative Study on Tribological Behavior of Sb_2S_3 Nano-bundles and Nano-particles in Liquid Paraffin

The tribological properties of Sb2S3 nano-bundles as an additive in liquid paraffin were evaluated on a four-ball tester,thereafter the performance of Sb2S3 nano-bundles was compared with that of Sb2S3 nano-particles.The comparative analyses of friction coefficients,wear scar diameters and morphology of worn surfaces show that Sb2S3 nano-bundles and nano-particles can both improve tribological properties of base oil,Sb2S3 nano-bundles exhibit better friction reduction and anti-wear properties than Sb2S3 nano-particles at relative low load,and they possess very similar tribological performance at relative high load.As far as the load carrying ability is concerned,the performance of nano-particles is obviously better than nano-bundles.It is inferred that the sliding-rolling friction transition emerges when lubricated with nano-bundles/oil mixture at low load,which contributes to the good lubricating effect of the nano-bundles.