Characterization of multi-principal-element (TiZrNbHfTa)N and (TiZrNbHfTa)C coatings for biomedical applications

V. Braic, M. Balaceanu, M. Braic, A. Vladescu, S. Panseri, A. Russo

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Multi-principal-element (TiZrNbHfTa)N and (TiZrNbHfTa)C coatings were deposited on Ti6Al4V alloy by co-sputtering of Ti, Zr, Nb, Hf and Ta metallic targets in reactive atmosphere. The coatings were analyzed for elemental and phase compositions, crystalline structure, morphology, residual stress, hardness, friction performance, wear-corrosion resistance and cell viability. For all the films, only simple fcc solid solutions with (111) preferred orientations were found, with crystallite sizes in the range 7.2-13.5nm. The coatings were subjected to compressive stress, with values ranging from 0.8 to 1.6GPa. The carbide coating with the highest carbon content (carbon/metal ≈1.3) exhibited the highest hardness of about 31 GPa, the best friction behavior (μ = 0.12) and the highest wear resistance (wear rate K=0.2×10 -6mm 3N -1m -1), when testing in simulated body fluids (SBFs). Cell viability tests proved that the osteoblast cells were adherent to the coated substrates, and a very high percentage of live cells were observed on sample surfaces, after 72h incubation time.

Original languageEnglish
Pages (from-to)197-205
Number of pages9
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume10
DOIs
Publication statusPublished - 1 Jun 2012
Externally publishedYes

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Keywords

  • Cell viability
  • Corrosion-wear resistance
  • Magnetron sputtering
  • Microstructure
  • Multi-principal-element coatings

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

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