Effect of the deposition temperature on the phase-structural state and hardness of ion-plasma coatings obtained on the basis of the quasi-binary WB2-TiB2 system

Sobol O., Dur O.

FUNCTIONAL MATERIALS, vol.27, no.1, pp.100-106, 2020 (ESCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 1
  • Publication Date: 2020
  • Doi Number: 10.15407/fm27.01.100
  • Journal Name: FUNCTIONAL MATERIALS
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, Compendex
  • Page Numbers: pp.100-106
  • Hacettepe University Affiliated: Yes

Abstract

Using the methods of X-ray diffractometry, scanning electron microscopy with elemental microanalysis and nanoindentation, the possibilities of structural engineering of ion-plasma coatings based on the quasibinary WB2-TiB2 system were studied. The possibility of forming three phase-structural states was established: an X-ray amorphous (nanocluster) state at a low substrate temperature during deposition at T-S = 80 degrees C; a single-phase crystalline state at T-S = 300 degrees C; and a two-phase nanocrystalline state at large T-S. With the formation of a 2-phase state, the effect of nano-dispersing of crystallites was revealed. It is established that the highest hardness and elastic modulus are achieved in the coatings having a nanocrystalline structure with a texture. The highest hardness of 37.5 GPa was achieved in single-phase (W,Ti)B-2 coatings obtained at T-S = 300 degrees C. Models are discussed to explain the observed effects.