Friction And Wear Characteristics Of SiC Nano-particles As Additive Of Lubricating Oil

In this paper, Surface modified SiC nano-particales coated by silikane coupler KH-570 have been obtained as additive of lubricating oil. Dispersability and stability have been got because nano-particles have been modified in base oil. Deposition haven't appeared after five days.The experiment on wear of steel/steel pair and steel/aluminum alloy pair have been done on model M-200 wear testing machine to invest the relations between lubricating ability of lubricants and the extrinsic conditions (the load ,velocity) , additives contents. Nano-particles improve the lubricating ability in high load and velocity and restrain adherence abrasion.Lubricating ability of base oil and base oil+SiCp decrease with the increase of load and velocity, but base oil decrease faster than base oil+SiCp. The wear mechanism changes from ploughing to adherence abrasion which is the main form in high load and velocity lubricated with base oil. When base oil+SiCp is lubrication, ploughing is the only form of wear mechanism.Wear volume loss increase in low load and velocity and decrease in high load and velocity when add SiC nano-particles to base oil in steel/steel pair which express SiCp nano-particles improve lubricating ability in high load and velocity.Nano-particles increase the lubricating ability in steel/aluminum alloy pair. In this paper, optimization is 0.3wt.%.The wear map was obtained on the relationship between the wear and friction of aluminum alloy and the wear system parameter including the load, the sliding speed, the content of additive. The wear volume loss of aluminum alloy is larger under the synergism of the parameters than the simply superimpose of wear volume loss under the single parameter.