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Laser deposited coatings of Co‐Cr‐Mo onto Ti‐6Al‐4V and SS316L substrates for biomedical applications
Author(s) -
Wilson J. Michael,
Jones Nolan,
Jin Li,
Shin Yung C.
Publication year - 2013
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.32921
Subject(s) - materials science , intermetallic , indentation hardness , substrate (aquarium) , coating , brittleness , layer (electronics) , microstructure , optical microscope , metallurgy , cobalt , titanium , deposition (geology) , pulsed laser deposition , composite material , titanium alloy , phase (matter) , thin film , scanning electron microscope , nanotechnology , alloy , paleontology , oceanography , chemistry , organic chemistry , sediment , biology , geology
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.