锶
腐蚀
转化膜
涂层
钛
微观结构
材料科学
磷酸盐
化学工程
生物陶瓷
相(物质)
沉积(地质)
基质(水族馆)
冶金
矿物学
核化学
化学
纳米技术
有机化学
古生物学
沉积物
工程类
生物
海洋学
地质学
作者
Guochao Gu,Yibo Li,Kangqing Zuo,Gui‐yong Xiao
出处
期刊:Molecules
[MDPI AG]
日期:2023-09-16
卷期号:28 (18): 6651-6651
标识
DOI:10.3390/molecules28186651
摘要
Strontium (Sr) is a trace element in the human body that can promote bone formation and inhibit bone absorption. A conversion coating of strontium phosphate (Sr-P) on the surface of titanium (Ti) can improve its biological properties and has many potential applications in the fields of dentistry and orthopedics. In the present study, Sr-P coatings with SrHPO4 and Sr3(PO4)2 crystals on Ti are prepared by a phosphate chemical conversion (PCC) treatment and the effect of pH values on the properties of the Sr-P coatings is researched. The results prove that the phase composition, morphology, and corrosion resistance of the coated Ti vary according to the pH values of the PCC solution. The morphology of the conversion deposition on Ti changes from plat-like to cluster-like and then to homogeneous microcrystals as the pH value changes from 2.50 to 3.25. Only discrete SrHPO4 crystals are generated on the substrate at lower pH values, while relatively stable Sr3(PO4)2 and SrHPO4 crystals grow and subsequently form an integrated coating on the Ti as the pH exceeds 2.50. The cross-sectional morphologies and bonding strength of different coatings are also researched. The corrosion resistance of coated Ti improves compared with that of bare Ti because of the Sr-P coatings with a Sr3(PO4)2 phase. In addition, it is indicated that the Sr-P coatings on Ti can improve the adhesion and differentiation of BMSCs.
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