Biocompatibility study of multi-layered hydroxyapatite coatings synthesized on Ti-6Al-4V alloys by RF magnetron sputtering for prosthetic-orthopaedic implant applications

Dunya Abdulsahib Hamdi, Zhong Tao Jiang, Kwangsoo No, M. Mahbubur Rahman, Ping Chin Lee, Linh Nguyen Thi Truc, Jaegyu Kim, Mohammednoor Altarawneh, L. Thair, Thamir Abdul Jabaar Jumaa, Bogdan Z. Dlugogorski

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)292-299
Number of pages8
JournalApplied Surface Science
Volume463
Issue numberJanuary
Early online date20 Aug 2018
DOIs
Publication statusPublished - 1 Jan 2019
Externally publishedYes

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