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Bioactive Ca-P coating with self-sealing structure on pure magnesium
J. J. Gan; L. L. Tan; K. Yang; Z. Q. Hu; Q. Zhang; X. M. Fan; Y. D. Li; W. R. Li
2013
Source PublicationJournal of Materials Science-Materials in Medicine
ISSN0957-4530
Volume24Issue:4Pages:889-901
AbstractBioactive coatings containing Ca and P with self-sealing structures were fabricated on the surface of pure magnesium using micro-arc oxidation technique (MAO) in a specific calcium hydroxide based electrolyte system. Coatings were prepared at three applied voltages, i.e. 360, 410 and 450 V, and the morphology, chemical composition, corrosion resistance and the degradation properties in Hank's solution of the MAO-coated samples with three different applied voltages were investigated. It was found that all the three coatings showed similar surface morphologies that the majority of micro-pores were filled with compound particles. Both the porous structures and the compound particles were found to contain consistent chemical compositions which were mainly composed of O, Mg, F, Ca and P. Electrochemical tests showed a significant increase in corrosion resistance for the three coatings, meanwhile the coating obtained at 450 Vexhibited the superior corrosion resistance owing to the largest coating thickness. The long term immersion tests in Hank's solution also revealed an effective reduction in corrosion rate for the MAO coated samples, and the pH values of the coated samples always maintained a lower level. Besides, all the three coatings were subjected to a mild and uniform degradation, while the coating obtained at 360 V showed a relatively obvious degradation characteristic and appreciable Ca and P contents on the surfaces of the three coatings were observed after immersion in Hank's solution. The results of the present study confirmed that the MAO coatings containing bioactive Ca and P elements with self-sealing structures could significantly enhance the corrosion resistance of magnesium substrate in Hanks' solution with great potential for medical application.
description.department[gan, junjie ; fan, xinmin] nanjing univ sci & technol, nanjing 210094, jiangsu, peoples r china. [gan, junjie ; tan, lili ; yang, ke ; hu, zhuangqi] chinese acad sci, inst met res, shenyang 110016, peoples r china. [zhang, qiang] gen hosp peoples liberat army, beijing 100853, peoples r china. ; tan, ll (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; lltanimr@gmail.com
KeywordPlasma Electrolytic Oxidation In-vivo Corrosion Microarc Oxidation Biomedical Magnesium Alloy Az91d Ion-implantation Mg Alloy Behavior Silicate Bone
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71220
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. J. Gan,L. L. Tan,K. Yang,et al. Bioactive Ca-P coating with self-sealing structure on pure magnesium[J]. Journal of Materials Science-Materials in Medicine,2013,24(4):889-901.
APA J. J. Gan.,L. L. Tan.,K. Yang.,Z. Q. Hu.,Q. Zhang.,...&W. R. Li.(2013).Bioactive Ca-P coating with self-sealing structure on pure magnesium.Journal of Materials Science-Materials in Medicine,24(4),889-901.
MLA J. J. Gan,et al."Bioactive Ca-P coating with self-sealing structure on pure magnesium".Journal of Materials Science-Materials in Medicine 24.4(2013):889-901.
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