自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 11    No. 2    June 2004

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Preparation of calcium phosphate coating on pure
titanium substrate by electrodeposition method
ZHAO Zhong-wei(赵中伟), ZHANG Gang(张 刚), LI Hong-gui(李洪桂)

College of Metallurgical Science and Engneering, Central South University, Changsha 410083, China

Abstract:The influences of pH value, electrolyte temperature and loading time on depositing calcium phosphate coating on pure titanium substrate by electrodeposition process were investigated. The process was carried out with an electro-chemical work-station supplying a direct current power at potential of -0.8V (vs SCE). The electrolyte consists of 7mmol·L-1CaCl2·2H2O, 3 mmol·L-1Ca(H2PO4)2·H2O and 2.5% H2O2. NaOH and HCl solutions were used to adjust pH value. The deposited samples were characterized by X-ray diffraction and scanning electron microscope. The compari-son of the deposits obtained at lower and higher pH values demonstrates that the crystallization process at the interface is favoured by high pH value. With temperature increasing, the deposited hydroxyapatite is occasionally of plate-like shape,and the width and the length of the deposited calcium phosphates at 65℃are larger than those at 55℃. Therefore, it is
confirmed that the morphology and microstructure of electrochemically deposited calcium phosphates can be regulated. Ad-ditionally, the coating formed in electrolyte with H2O2additive is homogeneous and the evolution of H2bubble can be elim-inated.

 

Key words: calcium phosphate; coating; electrodeposition; XRD; SEM

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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