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	Electrochemical deposition mechanism of calcium phosphate coating in dilute Ca-P electrolyte system
	Hu, Ren ; Lin, Changjian ; Shi, Haiyan ; Shi HY(石海燕) ; Wang, Hui ; Wang H(王慧)
	2009
关键词	Electrochemical deposition Hydroxyapatite coating Microstructure Phase diagram
英文摘要	In this work, the electrochemical deposition behavior of calcium phosphate coating from an aqueous electrolyte containing very dilute calcium and phosphorus species (Ca-P) was studied. The effects of three process parameters, i.e. temperature, current density and duration, were systematically investigated and the underlying mechanism was thoroughly analyzed. It was observed that the coating is mainly composed of hydroxyapatite (HA) in a wide range of temperature and current densities. The temperature had a significant effect on the deposition velocity. An apparent activation energy of 174.9 kJ mol(-1) was subsequently derived, indicating the mass-transfer control mechanism for the coating formation. The current density was identified to be an important parameter for structure controllability. The results of DR-FTIR/Raman spectroscopic studies of the initial deposition phase strongly suggested that the HA coating was instantaneously and directly precipitated on the substrate; neither induction period nor precursor was detected in this dilute Ca-P electrolyte system. Finally, a phase diagram of the Ca-P electrolyte system was constructed, which offered a thermodynamic reason for the direct single-phase HA precipitation observed only in this system. but not in conventional concentrated systems. (C) 2009 Elsevier B.V. All rights reserved.; National Science Foundation of China [20773100, 20620130427]; National Basic Research Program of China [2007CB935603]
语种	英语
出版者	ELSEVIER SCIENCE SA
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1016/j.matchemphys.2009.02.022]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	Hu, Ren,Lin, Changjian,Shi, Haiyan,et al. Electrochemical deposition mechanism of calcium phosphate coating in dilute Ca-P electrolyte system[J],2009.
APA	Hu, Ren,Lin, Changjian,Shi, Haiyan,石海燕,Wang, Hui,&王慧.(2009).Electrochemical deposition mechanism of calcium phosphate coating in dilute Ca-P electrolyte system..
MLA	Hu, Ren,et al."Electrochemical deposition mechanism of calcium phosphate coating in dilute Ca-P electrolyte system".(2009).

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