抄録
Effect of other additives on boundary lubrication performance of organomolybdenum compound was studied in order to understand the lower friction mechanism at the combination condition of additives. Ball on ring type friction test was conducted, and molybdenum dithiocarbamate (MoDTC), zinc dialkylditihiophosphate(ZnDTP), phosphate ester (TCP) and sulfurized oil (SO) were used as additives in this study. Results show that the friction coefficient after the test in MoDTC and ZnDTP containing lubricant is almost same as that after the test in the condition using only MoDTC, on the other hand the wear area in MoDTC and ZnDTP is smaller than that in the condition using only MoDTC. This result shows that the anti-wear performance in MoDTC is improved by the combination of ZnDTP. It is also shown that the friction coefficient after the test in MoDTC and TCP is higher than that after the test in the condition using only MoDTC, and the wear area in MoDTC and TCP is almost same as that in the condition using only TCP. These results suggest that the lubrication performance for lower friction and anti-wear in combination of MoDTC and ZnDTP is higher than that in MoDTC and TCP. Evaluation method for the boundary lubrication performance under the combination condition is also discussed in this study.
