TRIBOCHEMISTRY OF GADOLINIUM DIALKYLDITHIOPHOSPHATE

In the present paper, the tribological behaviors of gadolinium dialkyl dithiophosphate (GdDDP) were evaluated on friction testers. Thereafter , the tribochemistry of GdDDP were investigated through scanning elect ron microscopy (SEM), Anger electron spectroscopy (AES) and X-ray phot oelectron spectroscopy (XPS). The results indicated that GdDDP possess es very good antiwear and friction-reducting capacities; the boundary film and the diffusion layer with metallic gadolinium, phosphate and o rgano-sulfide played dominant roles in reducing friction and wear.