Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10384607 | Tribology International | 2005 | 9 Pages |
Abstract
A paper-based wet friction material lubricated with automatic transmission fluids (ATFs) produces plateau and positive slope regions in the friction-sliding velocity diagram. This feature observed at less than 1Â mm/s of sliding velocity is discussed in this paper. The relationship between the friction and contact pressures of less than 5Â MPa was determined by a reciprocating friction test rig lubricated with mineral oil including phosphoric acid ester, one of the additives for ATFs. The real contact area for dry condition was also determined by optical interferometry. The consistency of the real contact pressure dependency of the shear strength of the boundary film was indicated at pressures of less than 1Â GPa obtained by steel-on-steel boundary friction (oiliness) test. This suggests that the generation of the positive slope region is due to thin film lubrication. To the plateau region, possibility of application of the phase transition model is considered.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Masao Eguchi, Takashi Yamamoto,