Improving the Degradation Resistance and Surface Biomineralization Ability of Calcium Phosphate Coatings on a Biodegradable Magnesium Alloy via a Sol-Gel Spin Coating Method. Issue 3 (1st March 2018)

• Record Type: Journal Article
• Authors: Su, Yingchao; Lu, Chengjia; Hu, Xiaoli; Guo, Yunting; Xun, Xianchao; Zhang, Zhihui; Li, Guangyu; Lian, Jianshe; Ren, Luquan
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 3(2018)
• Page Start: C155
• Page End: C161
• Publication Date: 2018-03-01
• Subjects: Biodegradable property -- Calcium phosphate coatings -- Magnesium alloy; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0901803jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Bioactive calcium phosphate (CaP) coatings have been applied on biodegradable magnesium (Mg) and its alloys to provide a suitable degradation rate for orthopedic applications. However, the porous CaP coatings formed in the aqueous solution owns poor degradation resistance and thus short in vivo valid life. This paper reports a sol-gel spin coating method to prepare hydroxyapatite (HA, Ca10 (PO4 )6 (OH)2 ) and fluorine doping HA sealing coatings on a porous CaP coating. The effects of fluorine content on the degradation and biomineralization behaviors of the composite coatings were studied. It reveals that the homogeneous and stable sol-gel coating, especially the fluorapatite coating could significantly improve the degradation resistance and surface biomineralization ability of the porous CaP coating on the Mg alloy.