In Vitro Immersion Behavior of Cold Sprayed Hydroxyapatite/Titanium Composite Coatings

Lin Lu, Xuan Zhou, P. Mohanty

1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China 2Department of Mechanical Engineering, University of Michigan, Dearborn, USA.
Department of Electrical and Computer Engineering, Kettering University, Flint, USA.
Department of Mechanical Engineering, University of Michigan, Dearborn, USA.

DOI: 10.4236/jbm.2014.22002                

Abstract

In previous study, dense and homogenous 20wt% HAP/Ti composite coatings were successfully deposited on Ti substrates by cold gas dynamic spray technique. The results revealed that the phase composition of the HAP in the deposit is identical to that of the precursor powder and the bonding strength of the deposit is comparable/better to that of the plasma sprayed HAP. A relatively higher corrosion current of HAP/Ti composite than that of pure Ti coating in simulated body fluid indicates a good bioactivity for composite coating. In the present study, in vitro immersion test is carried out for various period of time and the formation of apatite layer on surface of composite coating proves the good bioactivity of the composite coating further. The cold sprayed HAP/Ti composite can be anticipated to be a promising load-bearing implant material for biomedical applications.

Keywords

Cold Spray; Hydroxyapatite (HAP)/Titanium Composite; In Vitro Immersion; Corrosion

Conflicts of Interest

The authors declare no conflicts of interest.

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