Please use this identifier to cite or link to this item: https://doi.org/10.1002/jbm.a.32652
Title: Influence of anodization on the adhesion of calcium phosphate coatings on titanium substrates
Authors: Blackwood, D.J. 
Seah, K.H.W. 
Keywords: Adhesion
Electrochemical deposition
Hydroxyapatite
Titanium implants
Issue Date: 15-Jun-2010
Source: Blackwood, D.J., Seah, K.H.W. (2010-06-15). Influence of anodization on the adhesion of calcium phosphate coatings on titanium substrates. Journal of Biomedical Materials Research - Part A 93 (4) : 1551-1556. ScholarBank@NUS Repository. https://doi.org/10.1002/jbm.a.32652
Abstract: Electrochemical deposition is an attractive technique for the deposition of calcium phosphate, especially hydroxyapatite, on titanium implants. However, the adhesion of these coatings to the titanium substrates needs to be improved for clinical use. It is demonstrated that anodization of a titanium alloy does marginally increase the adhesion of calcium phosphate coatings. Although scratch test measurements on coatings deposited at a constant potential appear to suggest that adhesion improves with increased thickness of the anodized layer, when a constant current is used to deposit the coatings their adhesion becomes independent of the thickness of the anodized layer. This apparent contradiction is explained by the thicker oxides acting as larger series resistors that reduce the magnitude of the current density when deposition is conducted at a constant potential. The resulting lower current density is responsible for increased adhesion of the calcium phosphate coating. It was also observed that surface roughness affects the interfacial adhesion strength between the coating and the titanium substrate, with a more adherent coating being formed over a rough surface. However, adhesion becomes independent of surface finish at levels smoother than 600 grit, suggesting that mechanical interlocking is not the sole force at play. © 2009 Wiley Periodicals, Inc.
Source Title: Journal of Biomedical Materials Research - Part A
URI: http://scholarbank.nus.edu.sg/handle/10635/60519
ISSN: 15493296
DOI: 10.1002/jbm.a.32652
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

13
checked on Dec 13, 2017

WEB OF SCIENCETM
Citations

11
checked on Nov 14, 2017

Page view(s)

30
checked on Dec 16, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.