TITLE:
In Vitro Immersion Behavior of Cold Sprayed Hydroxyapatite/Titanium Composite Coatings
AUTHORS:
Lin Lu, Xuan Zhou, P. Mohanty
KEYWORDS:
Cold Spray; Hydroxyapatite (HAP)/Titanium Composite; In Vitro Immersion; Corrosion
JOURNAL NAME:
Journal of Biosciences and Medicines,
Vol.2 No.2,
April
29,
2014
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.