Study on Phase Structure of Micro-plasma Sprayed Hydroxyapatite Coatings by Micro-Raman Spectroscopy

被引：0
|
作者：
Liu X. [1 ]
He D. [1 ,2 ]
Zhou Z. [1 ,2 ]
Wang G. [2 ]
Wang Z. [2 ]
Wu X. [2 ]
机构：
[1] College of Materials Science and Engineering, Beijing University of Technology, Beijing
[2] Beijing Engineering Research Center of Eco-materials and LCA, Beijing University of Technology, Beijing
来源：
Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Hydroxyapatite coating; Micro-plasma spraying; Micro-Raman spectroscopy; Phase structure; Splat;
D O I：
10.11896/cldb.18010273
中图分类号：
学科分类号：
摘要：
Hydroxyapatite (HA) coatings have been widely used in biomedical applications owing to their excellent biocompatibility and osteoconductivity. However, the biological properties of HA coatings are closely related to their microstructure. In this study, HA coating and splats were deposited onto Ti-6Al-4V substrates by micro-plasma spraying technique. Microstructure of the single splat and the cross-section of HA coating was characterized by scanning electron microscopy (SEM). The phase structure of splat and coating was investigated by micro-Raman spectroscopy to obtain the information of PO4 3- and OH-. The phase distribution in the surface of splat and the change of phases along the direction of coating thickness were obtained by using curve fitting of micro-Raman spectra in 900-1 000 cm-1 frequency range. The results show that the splat mainly contains amorphous phase. Near the substrate-coating interface, coating is mainly composed of amorphous phase and decomposition phase (β-TCP) as well as a small amount of HA phase. With increasing distance from substrate-coating interface, the amorphous phase content decreased and HA content increased. Near coating surface, the decomposition phase and amorphous phase were slightly increased. © 2019, Materials Review Magazine. All right reserved.
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页码：1634 / 1639
页数：5
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