声电沉积透钙磷石和羟基磷灰石涂层动力学对比研究  

Research on the Comparison of Brushite and Hydroxyapatie Coatings on C/C Composite by Sonoelectrodeposition Technique

作　　者：熊信柏[1] 李贺军[2] 曾燮榕[1] 邹继兆[2] 唐汉玲[2] 谢盛辉[2] 

机构地区：[1]深圳大学理学院材料科学与工程系深圳市特种功能材料重点实验室,广东深圳518060 [2]西北工业大学超高温复合材料国防重点实验室,陕西西安710072

出　　处：《中国材料科技与设备》2007年第1期77-79,共3页Chinese Materials Science Technology & Equipment

基　　金：深圳大学科研启动基金资助项目（4XXB）

摘　　要：借助声电沉积技术，在碳／碳复合材料表面制备了生物活性透钙磷石和羟基磷灰石涂层。采用分析天平称量了不同温度和时间的涂层重量，通过理论分析研究了涂层沉积的动力学规律。结果表明随时间温度增加，涂层的质量增加。透钙磷石和羟基磷灰石沉积都受扩散过程控制，并且得出羟基磷灰石的扩散活化能是7．24Kcal／mol，透钙磷石的扩散活化能很小，在本实验范围内不能求出，但通过比较分析，可知透钙磷石的扩散活化能远小于羟基磷灰石涂层，因此从理论上揭示了声电沉积工艺中，透钙磷石优先羟基磷灰石涂层沉积的本质原因。In this paper, bioactive brushite and hydroxyapatite coatings were prepared by sonoelectrodeposition technique on C/ C composite, the deposition kinetics of these coatings were investigate by analyses of weight gain with the analysis balance at various temperatures and times. The results showed that the weight gain of these coatings increased with increasing temperature and time. The deposition procedure for brushite coating and hydroxyapatite coating were both controlled by ion diffusion from the electrolyte. The cal- culated diffusion active energy of brusite coating wasn＇t gotten in our experimental errors but could be known to much smaller than that of hydroxyapatite coating which was 7.24Kcal/mol. So, in virtue of this kinetics analysis, we could explain the reason of easier forma- tion of brushite than that of hydroxyapatite for sonoelectrodeposition processing.

关 键 词：碳/碳复合材料 羟基磷灰石 涂层 动力学 

分 类 号：TG156.8[金属学及工艺—热处理]