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Microstructures and bond strengths of the calcium phosphate coatings formed on titanium from different simulated body fluids

journal contribution
posted on 2009-01-01, 00:00 authored by Xiaobo Chen, Yuncang Li, Peter HodgsonPeter Hodgson, Cui'E Wen
Calcium phosphate (Ca-P) coatings were deposited on Ti substrates by a biomimetic method from m-SBF and 10× SBF, respectively. Comparative study of microstructures and bond strengths of the Ca-P coatings deposited from those different SBFs was carried out. Effect of the surface roughness of the substrates on the bond strength of the Ca-P coatings was also studied. Scanning electron microscopy (SEM), X-ray diffractometry (XRD), Fourier transformed infrared spectroscopy (FTIR), inductive coupled plasma spectrometry (ICP) and thermogravimetry (TG) were used to characterize the Ca-P coatings. The bond strengths between the coatings and Ti substrates were measured using an adhesive strength test. Results indicated that the ionic concentrations of the SBFs and the surface roughness of the substrate had a significant influence on the formation, morphology and bond strength of the Ca-P precipitates. The induction period of time to deposit a complete Ca-P layer from the m-SBF is much longer, but the Ca-P coating is denser and has higher bond strength than that formed from the 10× SBF. The Ti with a surface roughness of Ra 0.64 µm and Rz 2.81 µm favoures the formation of a compact Ca-P coating from the m-SBF with the highest bond strength of approximately 15.5 MPa.

History

Journal

Materials science and engineering C : materials for biological applications

Volume

29

Issue

1

Pagination

165 - 171

Publisher

Elsevier SA

Location

Lausanne, Switzerland

ISSN

0928-4931

eISSN

1873-0191

Language

eng

Publication classification

C1 Refereed article in a scholarly journal; C Journal article

Copyright notice

2008, Elsevier B.V