Investigation of nanostructured TiSiC-Zr and TiSiC-Cr hard coatings for industrial applications

C. Vitelaru, M. Balaceanu, A. Parau, C. R. Luculescu, A. Vladescu

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

TiSiC, TiSiC-Zr and TiSiC-Cr coatings, with Zr and Cr added to TiSiC base coating system, have been prepared by cathodic arc method in a CH4 reactive atmosphere. All the coatings exhibited nanocomposite structures, mainly consisting of a mixture of crystalline face-centered cubic (FCC) carbide solid solutions, with a preferential (220) texture, and amorphous carbon phases. The coatings showed compact, homogeneous and featureless cross-sectional microstructures.Cr and Zr incorporation in TiSiC resulted in lattice distortion (from a lattice parameter of 0.4358nm for TiSiC, to 0.4536nm and 0.4320nm for TiSiC-Zr and TiSiC-Cr, respectively) and grain refinement. Also, alloying TiSiC led to a reduction of stress in the films, from -3.12GPa (TiSiC) to -2.37GPa (TiSiC-Cr) and -2.58GPa (TiSiC-Zr), and to film hardness changes (TiSiC: 35.2GPa; TiSiC-Zr: 42.1GPa; TiSiC-Cr: 31.4GPa). Of the investigated coatings, TiSiC-Zr exhibited the lower dry friction coefficient (~0.3) and the lowest wear rate (~2*10-6 mm3N-1m-1).

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalSurface and Coatings Technology
Volume251
DOIs
Publication statusPublished - 25 Jul 2014
Externally publishedYes

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Keywords

  • Cathodic arc
  • Friction and wear
  • Structure
  • TiSiC, TiSiC-Zr and TiSiC-Cr coatings

ASJC Scopus subject areas

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

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