TY - JOUR
T1 - Biocompatibility study of multi-layered hydroxyapatite coatings synthesized on Ti-6Al-4V alloys by RF magnetron sputtering for prosthetic-orthopaedic implant applications
AU - Hamdi, Dunya Abdulsahib
AU - Jiang, Zhong Tao
AU - No, Kwangsoo
AU - Rahman, M. Mahbubur
AU - Lee, Ping Chin
AU - Truc, Linh Nguyen Thi
AU - Kim, Jaegyu
AU - Altarawneh, Mohammednoor
AU - Thair, L.
AU - Jumaa, Thamir Abdul Jabaar
AU - Dlugogorski, Bogdan Z.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Triple-layered RF magnetron sputtered HAp/Al 2 O 3 /TiO 2 coatings synthesized onto Ti-6Al-4V alloys were studied to improve the surface biocompatibility and corrosion resistance features. It was seen that the HAp layers played a substantial role in the biocompatibility, while the intermediate Al 2 O 3 /TiO 2 layers were used to enhance the corrosion behavior of the substrate. XRD results showed an enhanced crystallinity along with the (2 1 1) HAp phase after the simulated body fluid (SBF) immersion experiment. Local electronic and chemical bonding states of atomic phosphorus and calcium phosphate groups in the coatings, before and after immersion process, were confirmed via XPS studies. The electrochemical impedance spectroscopy (EIS) evaluated the corrosion, which indicated a reduction in capacitance values and a significant improvement of the corrosion resistance of such coatings; with improved bio-medical properties of Ti alloys.
AB - Triple-layered RF magnetron sputtered HAp/Al 2 O 3 /TiO 2 coatings synthesized onto Ti-6Al-4V alloys were studied to improve the surface biocompatibility and corrosion resistance features. It was seen that the HAp layers played a substantial role in the biocompatibility, while the intermediate Al 2 O 3 /TiO 2 layers were used to enhance the corrosion behavior of the substrate. XRD results showed an enhanced crystallinity along with the (2 1 1) HAp phase after the simulated body fluid (SBF) immersion experiment. Local electronic and chemical bonding states of atomic phosphorus and calcium phosphate groups in the coatings, before and after immersion process, were confirmed via XPS studies. The electrochemical impedance spectroscopy (EIS) evaluated the corrosion, which indicated a reduction in capacitance values and a significant improvement of the corrosion resistance of such coatings; with improved bio-medical properties of Ti alloys.
KW - Electrochemical impedance spectroscopy
KW - Hydroxyapatite
KW - RF magnetron sputtering
KW - Simulated body fluid
KW - Ti-based alloys
UR - http://www.scopus.com/inward/record.url?scp=85052523751&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2018.08.157
DO - 10.1016/j.apsusc.2018.08.157
M3 - Article
AN - SCOPUS:85052523751
SN - 0169-4332
VL - 463
SP - 292
EP - 299
JO - Applied Surface Science
JF - Applied Surface Science
IS - January
ER -