Laser deposited coatings of Co-Cr-Mo onto Ti-6Al-4V and SS316L substrates for biomedical applications

J. Michael Wilson, Nolan Jones, Li Jin, Yung C. Shin

Research output: Contribution to journalArticle

Abstract

Functionally gradient bio-coating material was built by laser deposition. Co-Cr-Mo material was deposited on a Ti-6Al-4V substrate transitioning from 0% to 100%. Control over the cooling rate is shown to be a key to reduce the effects of thermal expansion differences of the materials. The microstructures and composition of the functionally gradient material (FGM) were characterized using an optical microscope, SEM, EDS, and XRD. EDS results showed a gradual transition to 50% Co-Cr-Mo and ∼100% Co-Cr-Mo on the top layer. XRD analysis showed the absence of a brittle intermetallic phase that forms between Titanium and Cobalt. As the amount of Co-Cr-Mo increased, the microhardness of the FGM samples significantly increased. A comparison was made between Co-Cr-Mo deposited on SS316L substrates as well as Ti-6Al-4V. The bonding strength of the coatings on both substrates was tested and found to meet the ASTM standard requirement. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 101B: 1124-1132, 2013.

Original languageEnglish (US)
Pages (from-to)1124-1132
Number of pages9
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume101
Issue number7
DOIs
StatePublished - Oct 2013

Keywords

  • Co-Cr-Mo
  • Ti-6Al-4V
  • biomaterial
  • functionally graded material
  • laser direct deposition

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

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