Enhancement of corrosion resistance and mechanical properties of Mg-1.2Ca-2Bi via a hybrid silicon-biopolymer coating system

被引：28

作者：

Bakhsheshi-Rad, H. R. ^{[1
,2
]}

Hamzah, E. ^{[1
]}

Daroonparvar, M. ^{[1
]}

Kadir, M. R. Abdul ^{[2
]}

Kasiri-Asgarani, M. ^{[3
]}

Staiger, Mark P. ^{[4
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Mfg & Ind Engn, Johor Baharu 81310, Johor, Malaysia

[2] Univ Teknol Malaysia, Fac Biosci & Med Engn, Med Devices & Technol Grp MEDITEG, Johor Baharu 81310, Johor, Malaysia

[3] Islamic Azad Univ, Najafabad Branch, Fac Mat Engn, Adv Mat Res Ctr, Najafabad, Isfahan, Iran

[4] Univ Canterbury, Dept Mech Engn, MacDiarmid Inst Adv Mat & Nanotechnol, Private Bag 4800, Christchurch 8140, New Zealand

来源：

SURFACE & COATINGS TECHNOLOGY | 2016年 / 301卷

关键词：

Magnesium; Biomaterial; Polycaprolactone; Microstructure; Corrosion resistance; Mechanical properties; BIODEGRADABLE MG ALLOY; MAGNESIUM ALLOY; BIOMEDICAL APPLICATIONS; ORTHOPEDIC IMPLANTS; COMPOSITE COATINGS; IN-VIVO; BEHAVIOR; CA; PROTECTION; HYDROXYAPATITE;

D O I：

10.1016/j.surfcoat.2015.09.039

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

In this work, a hybrid dual layer surface coating consisting of a silicon (Si) underlayer and poly(s-caprolactone) (PCL) overlayer was investigated that was designed to reduce the corrosion rates of magnesium-based biomaterials. The Si underlayer was 1.2 mu m thick and composed of spherical nanoparticles. The overlayer of PCL was 75.2 mu m thick and comprised network of pores. Corrosion-induced reduction of the compressive strength of a Si/PCL-coated Mg-Ca-Bi alloy was lower than that of the uncoated or Si layer-coated alloys. However, the bonding strength of the Si coating (24.6 MPa) was significantly higher than that of the Si/PCL-coated samples (6.8 MPa). The Si/PCL coating dramatically enhances the charge transfer resistance of the Mg alloy (2.11 k Omega cm(2)) in simulated body fluid when compared with a Si-coated sample (2265.12 k Omega cm(2)). Si/PCL coatings are considered a promising route to control the corrosion rate and mechanical properties of Mg-based biomaterials. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：133 / 139

页数：7

共 31 条

[21]

Characterization of calcium phosphate layers grown on polycaprolactone for tissue engineering purposes [J].