Fabrication, degradation behavior and cytotoxicity of nanostructured hardystonite and titania/hardystonite coatings on Mg alloys

被引：15
作者：
Bakhsheshi-Rad, H. R. [1 ,2 ]
Hamzah, E. [1 ]
Kasiri-Asgarani, M. [2 ]
Jabbarzare, S. [2 ]
Daroonparvar, M. [1 ,3 ]
Najafinezhad, A. [2 ]
机构：
[1] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Mfg & Ind Engn, Johor Baharu 81310, Johor, Malaysia
[2] Islamic Azad Univ, Najafabad Branch, Dept Mat Engn, Adv Mat Res Ctr, Najafabad, Iran
[3] Azad Univ, Roudehen Branch, Fac Engn, Dept Mat Engn, Tehran 3973188981, Iran
来源：
VACUUM | 2016年 / 129卷
关键词：
Mg alloy; Hardystonite; Titania; Corrosion behavior; Cytotoxicity; MAGNESIUM ALLOY; COMPOSITE COATINGS; CORROSION; DEPOSITION; TITANIUM;
D O I：
10.1016/j.vacuum.2016.03.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, nanostructured hardystonite (HT) and titania (TiO2)/hardystonite (HT) dual-layered coatings were deposited on biodegradable Mg-Ca-Zn alloy via physical vapor deposition (PVD) combined with electrophoretic deposition (EPD). Although a single layer nano-HT coating can decrease the corrosion rate from 1.68 to 1.02 mm/year, due to the presence of porosities and microcracks, the nano-HT layer cannot sufficiently protect the Mg substrate. In contrast, the corrosion resistance of nano-HT coating is further improved by using nano-TiO2 underlayer since it was a smooth, very uniform and compact layer with higher contact angle (52.30 degrees). In addition, the MTT assay showed the viability of MC3T3-E1 on the nano-HT and nano-TiO2/HT coatings. The results demonstrated that the two-step surface modification improved both corrosion resistance and the cytocompatibility of the Mg alloy, hence making it feasible for orthopedic applications. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：9 / 12
页数：4
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