Preparation and Tribological Properties of Surface-modified Borate Magnesium Nanoparticles

Abstract

To develop a potential substitute for sulfurized olefins,surface-modified borate magnesium nanoparticles (titled as T-MgBN) were synthesized.The composition and microstructures of the as-obtained samples were characterized by inductively coupled plasma atomic emission spectroscopy(ICP-AES),X-ray power diffraction(XRD) and transmission electron microscope(TEM).The results indicate that T-MgBN with the size of around 50 nm is amorphous,and the appearance is irregular sheet.The tribological properties of T-MgBN in base oil evaluated using four-ball tribometer show that T-MgBN has better tribological capacity in base oil than that of T321.SEM and XPS analysis of the worn surface prove that there exists a wear resistance film which contains depositions and tribochemical reaction products(B_2O_3,FeB,Fe_2O_3 and BN) on the worn surfaces.