Micro-scale abrasive wear testing of duplex and non-duplex (single-layered) PVD (Ti,Al)N, TiN and Cr–N coatings

摘要: Abstract A micro-scale abrasive wear test, based on ball-cratering, has been used to evaluate the resistance of duplex and non-duplex (Ti,Al)N, TiN Cr–N coatings. The term is here when plasma nitriding followed by PVD coating. Coatings without stage are termed single-layered. Coating properties were evaluated surface profilometry, hardness scratch testing. All coatings showed higher micro-abrasive than their single-layered counterparts, with (Ti,Al)N coating achieving best performance. After a certain number ball revolutions, material became worn through, exposing substrate material. this point, presence hard nitrided case diminished scratching action SiC particles. experimental results also indicate that choice plays an important role in improving resistance. Apart from coatings, all other systems provided uncoated (hardened AISI H13 steel). poor recorded for could be attributed being much lower particles, which caused tearing subsequent delamination. pattern observed was found change surfaces characterised grooves (uncoated substrate, system) exhibited multiply indented (single-layered systems), indicating transition between mechanisms. This dependent ratio particles (coating) or subsurface hardness. By decreasing ratio, ability composite reduced abrasion improved.