Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
618445 | Wear | 2010 | 7 Pages |
Abstract
The effect of friction-reducing and antiwear of lubricant additives on T8 steel/Al2O3 ceramics was investigated using a pin-on-disk tribometer at a room temperature. Diisopropyl phosphite (T451) and triphenyl thiophosphate (T309 or TPPT) with various mass concentrations were blended in 500SN base oil to produce the lubricants, and their friction-reducing and antiwear were examined under the given applied normal loads of 220Â N (mainly for assessment of friction-reducing) and 400Â N (for antiwear), respectively. The results showed that base oil containing T451 and T309 can be more essential for improving the friction-reducing and antiwear behaviors, rather than those under the pure base oil, or the single additive. In detail, at a load of 220Â N, the synergistic effect of friction-reducing increased with addition of T451 and T309 within a suitable amount. At a load of 400Â N, the synergistic effect of antiwear prominently related with the content of T451, and the appropriate composition was 2%T451Â +Â 1%T309. SEM analysis of worn surfaces and AES spectra of typical elements indicated that the synergistic friction-reducing and antiwear effect is owing to the thick sulfur-rich and phosphorus-rich protective film formed on the worn surface T8 steel pin. The wear mechanisms were characterized by fracture and scuffing under the lubricants.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Shuyun Jiang, Shifei Yang,