Self-lubricating MoS2-doped nanolayered TiAlCrN tribological coatings prepared with composition-modulated interfaces

D. Biro, P. B. Barna, J. Meneve, L. Szekely, A. Devenyi

Research output: Contribution to journalArticle

Abstract

Thin film coatings of MoS2-added CrN/TiAIN multilayers were prepared by reactive d.c. co-sputtering of Ti/Al 50/50 at.%, pure chromium and MoS2 targets of the unbalanced magnetrons. Nano-scaled tri-layer system of TiAlN, CrN and MoS2 with a broad interface, in which the composition is continuously varying, was developed. The 4-5 μm thick coatings were deposited on high-speed steel substrates for tribological measurements. Structure characterization of the as-deposited coatings was performed by cross sectional transmission electron microscopy (TEM) analysis. The self-lubricating MoS2-doped TiAlN/CrN multilayer coatings with periodic thickness in a range of 4-10 nm had smaller crystallite size than the homogeneous Cr and CrN films. The crystallinity of the CrN and TiAlN sub-layers in the nano-scale multilayered system decreases with increasing thickness of the MoS2 sub-layer. It has been found that the structural properties and hardness of the films were correlated with the multiple-target design and MoS2 nanolayer thickness.

Original languageEnglish
Pages (from-to)34-44
Number of pages11
JournalTribologia
Volume27
Issue number1
Publication statusPublished - Jan 1 2008

Keywords

  • MoS-doped TiAlN/CrN coatings
  • Nano-scaled multilayers
  • Solid lubricant
  • XTEM

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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