Please use this identifier to cite or link to this item:
|Title:||Electrochemical cathodic deposition of hydroxyapatite: Improvements in adhesion and crystallinity|
|Authors:||Blackwood, D.J. |
|Source:||Blackwood, D.J., Seah, K.H.W. (2009-05-05). Electrochemical cathodic deposition of hydroxyapatite: Improvements in adhesion and crystallinity. Materials Science and Engineering C 29 (4) : 1233-1238. ScholarBank@NUS Repository. https://doi.org/10.1016/j.msec.2008.10.015|
|Abstract:||To improve on the biological performance of titanium and its alloys hydroxyapatite coatings are applied to the surface. Although plasma spraying is currently the clinically accepted deposition technique, it has drawbacks including being a line-of-site method which greatly limits its uses for coating either irregular-shapes or the low elastic moduli porous materials and metallic sponges now being developed for implants. Electrochemical cathodic deposition is an alternative technique but this also has disadvantages, mainly the crystallinity of the deposited hydroxyapatite and its adhesion to the substrate. In the present study it is demonstrated that increased adhesion and crystallinity are obtained by either pre-treating the Ti substrate with NaOH followed by a heat treatment at 600 °C or the addition of H2O2 to the electrolyte. The increased adhesion is believed to result in the former case from the development of a titanate binding layer. In the latter case the local alkaline conditions required for deposition are obtained from the reduction of the peroxide, thereby negating the need to evolve hydrogen that can damage the film. Rotating the substrate at low revolutions is also beneficial for adhesion however; at high rotation rates bulk precipitation is favoured over film formation. © 2008 Elsevier B.V. All rights reserved.|
|Source Title:||Materials Science and Engineering C|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 28, 2018
WEB OF SCIENCETM
checked on Feb 21, 2018
checked on Feb 27, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.