Investigation of multilayered TiSiC/NiC protective coatings

M. Braic, M. Balaceanu, A. C. Parau, M. Dinu, A. Vladescu

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

TiSiC/NiC multilayer coatings with different bilayer periods (Λ) in the range of 2.5-19.8 nm were deposited on Si wafers and steel (316 L and C 45) substrates using cathodic arc evaporation technique with TiSi and Ni cathodes in methane atmosphere. TiSiC and NiC single layers were also prepared as reference coatings. The coatings were analyzed for elemental and phase composition, microstructure, morphology, modulation periodicity, mechanical properties, and for the tribological characteristics in 0.9% NaCl corrosive solution. Cross-sectional SEM images presented well-defined multilayered structures. It has been shown that the properties of the multilayers depended strongly on the bilayer period, the best characteristics being obtained for the TiSiC/NiC coating with Λ = 4.8 nm. This coating was found to outperform the TiSiC monolithic film, revealing lower residual stress (σ = -0.88 GPa), improved adhesion (critical load Lc = 57 N), lower friction coefficient (μ = 0.16) and higher wear resistance (wear rate K = 0.7 × 10-6 mm3 N-1m-1) when compared to TiSiC coating: σ = -3.12 GPa, Lc = 36 N, μ = 0.38, K = 2.9 × 10-6 mm3 N-1m-1.

Original languageEnglish
Pages (from-to)60-66
Number of pages7
JournalVacuum
Volume120
Issue numberPA
DOIs
Publication statusPublished - 29 Jun 2015
Externally publishedYes

Keywords

  • Cathodic arc
  • Composition and structure
  • Friction and wear
  • TiSiC/NiC multilayer

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

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