Interfacial characterization of plasma-spray coated calcium phosphate on Ti-6Al-4V.

Abstract

Microstructural characterization was performed on plasma-spray coated calcium phosphate and its interface with Ti-6Al-4V using scanning and transmission electron microscopy. The amorphous calcium phosphate phase was found near the coating/substrate interface, usually in between the crystalline hydroxyapatite grains and the Ti-6Al-4V substrate. The presence of the amorphous calcium phosphate and the channels extending from the interface to the coating surface was attributed to the low interfacial bond strength in a physiological environment. There was an indication of titanium diffusing into the amorphous regions. However, no reaction phases were found between the coating and the Ti-6Al-4V substrate. In the coating area remote from the interface, no intergranular amorphous calcium phosphate phase was observed. The microstructure of the Ti-6Al-4V substrate near the interface was observed to be affected by heat generated during plasma spraying.

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@article{Park1998InterfacialCO, title={Interfacial characterization of plasma-spray coated calcium phosphate on Ti-6Al-4V.}, author={Eui-Seob Park and Robert A Condrate and David Hoelzer and Gary Fischman}, journal={Journal of materials science. Materials in medicine}, year={1998}, volume={9 11}, pages={643-9} }