碱预处理对水热电化学在钛合金表面沉积羟基磷灰石的影响

稀有金属材料与工程, 2014, 43(4): 830-835.

碱预处理对水热电化学在钛合金表面沉积羟基磷灰石的影响

杜见第 ^1, , 刘新宽 ^2, , 何代华 ^3, , 刘平 ^4, , 马凤仓 ^5, , 李芹 ^6, , 冯宁宁 ^7,

1.上海理工大学,上海200093

2.上海理工大学,上海200093

3.上海理工大学,上海200093

4.上海理工大学,上海200093

5.上海理工大学,上海200093

6.上海理工大学,上海200093

7.上海理工大学,上海200093

基金项目: The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology) (2013-KF-7)

关键词： Ti6Al4V , 羟基磷灰石涂层 , 碱预处理 , 水热电化学

Influence of Alkali Treatment on Ti6Al4V Alloy and the HA Coating Deposited by Hydrothermal-Electrochemical Methods

Du Jiandi ^1, , Liu Xinkuan ^2, , He Daihua ^3, , Liu Ping ^4, , Ma Fengcang ^5, , Li Qin ^6, , Feng Ningning ^7,

1.上海理工大学,上海200093

2.上海理工大学,上海200093

3.上海理工大学,上海200093

4.上海理工大学,上海200093

5.上海理工大学,上海200093

6.上海理工大学,上海200093

7.上海理工大学,上海200093

Keywords： Ti6Al4V , hydroxyapatite coating , alkali pretreatment , hydrothermal-electrochemical methods

Ti6Al4V基体经NaOH溶液恒温预处理不同的时间(12、24、36、48、60 h),然后分析了不同的碱预处理时间对Ti6Al4V基体及羟基磷灰石(HA)形态、物相的影响.经碱预处理后Ti6Al4V表面呈现三维网状结构,并检测到了钛酸钠凝胶的存在.随后采用水热电化学方法得到了HA涂层,水热反应电解质包括NaCl、K2HPO4·3H2O、CaCl2,在恒温120℃、电流密度为1.25 mA/cm2的条件下保持120 min.结果表明:HA的生长模式及形态均受预处理时间的影响:当基体经过12 h的预处理后,水热反应形成一层针状HA及少量蒲公英状HA.而蒲公英状HA的数量随预处理时间的增加而增多.但预处理时间大于48 h时,其数量稍有减小.HA在(002)晶面的取向指数、结晶度在预处理时间为48 h时分别达到了最小值、最大值.

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