title: 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.
authors.affiliation: New York State College of Ceramics, Alfred University, Alfred, NY 14802, USA.
authors.forename: E
authors.initials: E
authors.lastname: Park
authors.forename: R A
authors.initials: RA
authors.lastname: Condrate
authors.forename: D T
authors.initials: DT
authors.lastname: Hoelzer
authors.forename: G S
authors.initials: GS
authors.lastname: Fischman