Study of stressed hard coatings and of their abrasive particles by AES and REM

Abstract

Abstract. Chromium nitride and chromium oxide were deposited by arc PVD and APS on steel substrates to be worn in a testing set up simulating the abrasion process of a screw rotor compressor. The damage of CrxN is more severe than that of Cr20 3. The abrasive particles were collected on glassy carbon with a Batelle impactor and analyzed by AES and REM. Particles from the Cr~N coating are totally oxidized, in contrast to Particles from Cr20 3 which are not chemically influenced. No oxidation can be detected on the surface of the treated CrxN coating. The Cr20 3 coating is not affected either.