Structure and tribological properties of gradient-layered coatings (Ti, Al, Si, Cr, Mo, S) O, N

Stanislav Ovchinnikov, Mark Kalashnikov

Research output: Contribution to journalArticlepeer-review

Abstract

In order to search for new compositions and structures of wear-resistant and protective coatings, the study of multi-element gradient-layered coatings (Ti, Al, Si, Cr, Mo, S) O, N has been carried out. Using the methods of scanning, transmission electron microscopy, X-ray photoelectron spectroscopy, indentation, scratching and tribotesting, the composition, structure, and mechano-tribological properties of the coatings were studied. It was found that the pattern of the deformation relief of the wear track corresponds to various scales and mechanisms of destruction, from uniform destruction of the nanocrystalline layer to large fracture centers containing areas of substrate deformation, destruction and coating spalling, thick amorphous surface tribofilms of wear products. In general, the results obtained indicate an abrasive-oxidative wear mechanism. An increase in the level and heterogeneity of elastic strains and stresses, expressed in the development of a rotational deformation mode along the boundaries of nanocrystals, in the surface layer of the friction zone is established. In connection with the study of the phase composition of the friction zone, it was suggested that oxygen saturation significantly affects the decomposition of the phase of doped titanium nitride into amorphous wear products.

Original languageEnglish
Article number126807
JournalSurface and Coatings Technology
Volume408
DOIs
Publication statusPublished - 25 Feb 2021
Externally publishedYes

Keywords

  • Amorphization
  • Electron microscopy
  • Gradient-layered coatings
  • Rotational deformation mode
  • Wear

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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