Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28095
Title: Adhesion study of pulsed laser deposited hydroxyapatite coating on laser surface nitrided titanium
Authors: Man, HC 
Chiu, KY
Cheng, FT
Wong, KH
Keywords: Adhesion
Hydroxyapatite
Nitriding
Pulsed laser deposition
Titanium
Issue Date: 2009
Source: Thin solid films, 2009, v. 517, no. 18, p. 5496-5501 How to cite?
Journal: Thin Solid Films 
Abstract: Hydroxyapatite (HA) coatings were fabricated by pulsed laser deposition (PLD) on commercially pure titanium which had been subjected to different types of pre-treatment. These include: (i) 60-grit SiC grinding, (ii) 320-grit SiC grinding, (iii) 1-μm diamond paste mirror-finishing, (iv) etching with Knoll solution, and (v) laser surface nitriding followed by selective etching. The HA coatings were pulsed laser deposited at different water-vapor pressures to determine the optimal processing conditions. The nitrided-etched specimen exhibits a three dimensional TiN dendritic network which promotes the adhesion between HA coating and titanium substrate. Among the specimens with different pre-treatments, the adhesion strength of HA is the highest for the nitrided-etched specimen, reaching about twice that for the mirror-finished specimen. Thin-film X-ray diffraction shows a high degree of crystallinity for the PLD deposited HA. According to energy-dispersive X-ray analysis, the Ca/P ratio of the deposited HA reaches an approximate value of 1.7, similar to that of the HA target. Scanning-electron microscopy reveals that the deposited HA is about 4 μm in thickness. Growth of apatite was rapidly induced on the HA coated specimens when immersed in Hanks' solution for 4 days, indicating that the PLD HA coating is highly bone bioactive. This could be partly due to the high wettability of the PLD HA surface.
URI: http://hdl.handle.net/10397/28095
ISSN: 0040-6090
DOI: 10.1016/j.tsf.2009.03.208
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

28
Last Week
2
Last month
1
Citations as of Apr 24, 2017

WEB OF SCIENCETM
Citations

20
Last Week
0
Last month
0
Citations as of Mar 30, 2017

Page view(s)

33
Last Week
2
Last month
Checked on Apr 23, 2017

Google ScholarTM

Check

Altmetric



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