Extreme high temperature, low frictional coefficient coating
I have been searching for a coating that has a very low coefficient of friction to eliminate scratches when a soft metal rubs on the surface. The surface preparation is ground polished and the challenge here is the working temperature which is a constant 450 to 500 deg C. I have tried TiN and CrN but they are not satisfying as they have a coefficient of 0.6 & 0.7. DLC or DLN failed too as they starts to lose weight at 400 deg C.
Would appreciate if anyone can help.Chin Hiang, Tan
Most of the big coating companies in Europe have developed coatings for dry machining. I would suspect that these coatings would hold up under your conditions. I think there are at least two or three variations, including Ti-containing molybdenum disulfide, Cr-containing DLC, and a WC/C composite.
PVD Consultant - San Diego, California
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