Biomimetic synthesis and characterization of hydroxyapatite/graphene oxide hybrid coating on Mg alloy with enhanced corrosion resistance

被引：93

作者：

Gao, Fang ^{[1
]}

Xu, Chenyang ^{[1
]}

Hu, Huating ^{[2
]}

Wang, Qi ^{[1
]}

Gao, Yuanyang ^{[1
]}

Chen, Hao ^{[1
]}

Guo, Qiannan ^{[1
]}

Chen, Dazhong ^{[1
]}

Eder, Dominik ^{[2
]}

机构：

[1] China Univ Min & Technol, Fac Mech Elect & Informat Engn, Beijing 100083, Peoples R China

[2] Univ Munster, Inst Phys Chem, D-48149 Munster, Germany

来源：

MATERIALS LETTERS | 2015年 / 138卷

关键词：

Graphene oxide; Hydroxyapatite; Biomimetic; Magnesium; Corrosion; MAGNESIUM ALLOY; GRAPHENE;

D O I：

10.1016/j.matlet.2014.09.088

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

An effective biomimetic method for preparation of hydroxyapatite/graphene oxide (HA/GO) hybrid coating on AZ91 magnesium alloy was firstly proposed. AZ91 Mg alloy was first clip coated by GO, which was further used as matrix substrate for biomimetic mineralization of hydroxyapatite (HA) in modified simulated body fluid (m-SBF). It has been found that GO greatly promotes nucleation and crystallization for rapid HA growth, forming uniform and dense HA/GO hybrid coating comprised by flake-like HA crystals with high Ca/P ratio (1.65). Meanwhile, the as-formed HA/GO bio-coating could dramatically improve the corrosion resistance of Mg alloys. The corrosion current density of treated Mg alloys was decreased by one order of magnitude as compared to untreated one. Furthermore the effects of various experimental parameters toward the growth of the HA/GO coating on Mg alloys were also investigated. (C) 2014 Elsevier B.V. All rights reserved.

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页码：25 / 28

页数：4

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