Improvement of ‘duplex’ PVD coatings for HSS cutting tools by PFPE (perfluorpolyether ‘Z-DOL’)

Autor:	G.K. Dosbaeva, Dmitry Wainstein, German S. Fox-Rabinovich, Anatoly Kovalev, L.Sh. Shuster
Rok vydání:	2002
Předmět:	Materials science Cutting tool Metallurgy Surfaces and Interfaces General Chemistry Tribology engineering.material Condensed Matter Physics Surfaces Coatings and Films Coating Physical vapor deposition Materials Chemistry engineering Surface layer Thin film Layer (electronics) Nitriding
Zdroj:	Surface and Coatings Technology. 160:99-107
ISSN:	0257-8972
Popis:	A high-speed steel of M2 type was hardened by ‘duplex’ technology (ion nitriding followed by TiN PVD coating). The ‘duplex’ coating was further modified by application of a PFPE (perfluoropolyether Z-DOL) layer at the surface. The tribological parameters of the coating and the changes in composition and fine (atomic level) structural characteristics of the tool surface with a multi-layered coating were investigated. A process of self-organizing occurs during the running-in stage of the wear of the cutting tool surface with the multi-layered coating. Several parallel phenomena develop during this self-organizing process: (a) tribodecomposition of the thin surface layer: (b) formation of a stable amorphous-like protective layer (of Ti–O and Ti–F types) on the tool surface. All these processes improve the wear stability during the running-in stage of wear, leading to increased tool life.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0efe840c9d598da6afadae0e4299ef1b https://doi.org/10.1016/s0257-8972(02)00378-x Zobrazit plný text záznamu Full Text from ScienceDirect