Comparison of tribological properties of
industrial low friction coatings
industrial low friction coatings
(1.School of Materials Science and Engineering,
Tianjin University,Tianjin 300072,China;
2.Institute for Materials Research,
Limburg University Centrum, B-3590 Diepenbeek,Belgium;
3.Katholieke Universiteit Leuven, Dept.MTM,B-3001 Leuven, Belgium)
Tianjin University,Tianjin 300072,China;
2.Institute for Materials Research,
Limburg University Centrum, B-3590 Diepenbeek,Belgium;
3.Katholieke Universiteit Leuven, Dept.MTM,B-3001 Leuven, Belgium)
Abstract: MX2 (M=Mo,W;X=S,Se) and DLC (a-C:H and WC/C) are the two kinds of typical low friction coatings widely used in industry.The friction and wear properties of these two kinds of coatings marked as MOVIC,MOST,MoSe2/Ni, WSe2,a-C: H and WC/C coatings were determined by fretting tests in ambient air of different humidity.The results show that the coefficient of friction of MX2 coatings increases when the relative humidity of air increases whereas the coefficient of friction DLC coatings decreases with the increasing of relative humidity.MOVIC and WSe2 coatings have a poor friction and wear resistance because of non-basal planes (100) and (101) parallel to the surface in the MOVIC coating, or the rough and porous surface of WSe2 coatings.Among these six coatings,MoSe2 /Ni and WC/C coatings have the highest wear resistance which seems to be unaffected by the relative humidity.
Key words: low friction coatings;fretting;relative humidity