In vitro degradation of MAO/PLA coating on Mg-1.21Li-1.12Ca-1.0Y alloy

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	In vitro degradation of MAO/PLA coating on Mg-1.21Li-1.12Ca-1.0Y alloy
	R. C. Zeng; W. C. Qi; Y. W. Song; Q. K. He; H. Z. Cui; E. H. Han
	2014
发表期刊	Frontiers of Materials Science
ISSN	2095-025X
卷号	8 期号:4 页码:343-353
摘要	Magnesium and its alloys are promising biomaterials due to their biocompatibility and osteoinduction. The plasticity and corrosion resistance of commercial magnesium alloys cannot meet the requirements for degradable biomaterials completely at present. Particularly, the alkalinity in the microenvironment surrounding the implants, resulting from the degradation, arouses a major concern. Micro-arc oxidation (MAO) and poly(lactic acid) (PLA) composite (MAO/PLA) coating on biomedical Mg-1.21Li-1.12Ca-1.0Y alloy was prepared to manipulate the pH variation in an appropriate range. Surface morphologies were discerned using SEM and EMPA. And corrosion resistance was evaluated via electrochemical polarization and impedance and hydrogen volumetric method. The results demonstrated that the MAO coating predominantly consisted of MgO, Mg2SiO4 and Y2O3. The composite coating markedly improved the corrosion resistance of the alloy. The rise in solution pH for the MAO/PLA coating was tailored to a favorable range of 7.5-7.8. The neutralization caused by the alkalinity of MAO and Mg substrate and acidification of PLA was probed. The result designates that MAO/PLA composite coating on Mg-1.21Li-1.12Ca-1.0Y alloys may be a promising biomedical coating.
部门归属	[zeng, rong-chang ; qi, wei-chen ; he, qin-kun ; cui, hong-zhi] shandong univ sci & technol, coll mat sci & engn, qingdao 266590, peoples r china. [zeng, rong-chang ; qi, wei-chen] shandong univ sci & technol, state key lab min disaster prevent & control cofu, qingdao 266590, peoples r china. [zeng, rong-chang ; qi, wei-chen] shandong univ sci & technol, minist sci & technol, qingdao 266590, peoples r china. [song, ying-wei ; han, en-hou] chinese acad sci, inst met res, natl engn ctr corros control, shenyang 110016, peoples r china. ; zeng, rc (reprint author), shandong univ sci & technol, coll mat sci & engn, qingdao 266590, peoples r china. ; rczeng@foxmail.com
关键词	Magnesium Alloy Micro-arc Oxidation (Mao) Poly(Lactic Acid) (Pla) Biomaterial Degradation Plasma Electrolytic Oxidation Calcium-phosphate Coatings Mg-ca Alloys Magnesium Alloys Coated Magnesium Corrosion-resistance Vivo Corrosion Hanks Solution Biomaterials Implants
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73483
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. C. Zeng,W. C. Qi,Y. W. Song,et al. In vitro degradation of MAO/PLA coating on Mg-1.21Li-1.12Ca-1.0Y alloy[J]. Frontiers of Materials Science,2014,8(4):343-353.
APA	R. C. Zeng,W. C. Qi,Y. W. Song,Q. K. He,H. Z. Cui,&E. H. Han.(2014).In vitro degradation of MAO/PLA coating on Mg-1.21Li-1.12Ca-1.0Y alloy.Frontiers of Materials Science,8(4),343-353.
MLA	R. C. Zeng,et al."In vitro degradation of MAO/PLA coating on Mg-1.21Li-1.12Ca-1.0Y alloy".Frontiers of Materials Science 8.4(2014):343-353.