Electrochemical performance of TiCN coatings with low carbon concentration in simulated body fluid

Qianzhi Wang, Fei Zhou, Zhifeng Zhou, Lawrence Kwok Yan Li, Jiwang Yan

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

TiCN coatings with low carbon concentrations (0.99at.%-2.46at.%) were deposited on Si(100) wafers via co-sputtering titanium and graphite targets by using unbalanced magnetron sputtering. The influence of carbon content on the microstructure and electrochemical properties of TiCN coatings in simulated body fluid was analyzed. The results revealed that the amorphous carbon (a-C) was absent from TiCN coatings (0.99at.% or 2.05at.% carbon), which exhibited favorable corrosion resistances in SBF. But the presence of a-C in TiCN coating (2.46at.% carbon) lowered its hardness, and subsequently deteriorated its corrosion resistance in SBF. In particular, the TiCN coating with 2.05at.% carbon presented the higher charge transfer resistance (Rct) as compared with the TiCN coating (0.99at.% carbon) owing to more a-CNx and higher electrical resistivity.

Original languageEnglish
Pages (from-to)199-204
Number of pages6
JournalSurface and Coatings Technology
Volume253
DOIs
Publication statusPublished - 2014 Aug 25

Keywords

  • Electrochemistry
  • Impedance
  • Polarization
  • Simulated body fluid
  • Sputtered coatings

ASJC Scopus subject areas

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

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