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Bio-active Calcium Phosphate Thin Films on Implant Grade Titanium Alloy Using a Silica Barrier Layer

Published online by Cambridge University Press:  17 March 2011

J. Reid ,
M. Sayer  and
T.J.N. Smith
J. Reid
Affiliation:
Department of Physics, Queen's University, Stirling Hall, Queen's Crescent, Kingston, ON K7L 3P6, Canada
M. Sayer
Affiliation:
Department of Physics, Queen's University, Stirling Hall, Queen's Crescent, Kingston, ON K7L 3P6, Canada
T.J.N. Smith
Affiliation:
Millenium Biologix Inc., 785 Midpark Drive, Kingston, ON K7M 7G3, Canada
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Abstract

Resorbable calcium phosphate (CaP) thin films previously prepared only on quartz substrates were fabricated on Ti-6Al-4V implant grade titanium alloy. In order to maintain the characteristic phase composition and surface morphology of the CaP thin film, an intermediate silica barrier layer was deposited on the titanium alloy via chemical vapour deposition (CVD) using a metal organic precursor. CaP thin films were subsequently deposited on the intermediate SiO2 layer using the dip coating method, and sintered at 1000°C. The final sintered films have a multiphase composition consisting of calcium hydroxyapatite (HA) and a silicon stabilized form of alpha tri-calcium phosphate, or Si-TCP. The thickness of the silica barrier layers were evaluated in terms of the main CVD processing parameters using variable wavelength fixed angle ellipsometry and these parameters were optimized to best reproduce the characteristic CaP thin film. The phase composition and surface morphology of the CaP thin films were characterized using glancing angle X-ray diffraction and scanning electron microscopy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 711: Symposia FF/GG/HH – Advanced Biomaterials--Characterization, Tissue Engineering and Complexity , 2001 , FF1.10.1
Copyright
Copyright © Materials Research Society 2002

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References

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