Research on Preparation of Bioactive Hydroxyapatite on Pure Titanium
The methods of preparation of hydroxyapatite coatings by complex oxidation and hydrothermal treatment were analyzed. The complex oxidation meant that the titanium plates were anodic oxidized firstly and then micro-arc oxidized. The surface morphology, microstructure, phase structure and relative percentage of Ca, P and Ti atoms were studied by means of SEM, XRD and EDS. In addition, the mechanisms of coating generating were discussed. The results indicated that the oxide films with symmetrical discharged pores, combining firmly with bases and including Ca &P elements were formed by complex oxidation process. After hydrothermal treatment in alkalescence solution applied to the titanium plates with complex oxidation film, the phosphate ions of inner layer distributed to the outer layer through the discharged pores. Then these phosphate ions reacted with the hydroxide ions and calcium ions in the outer layer, by which the hydroxyapatite was obtained.
micro-arc oxidation anodic oxidation hydrothermal treatment titanium Hydroxyapatite
WANG Tianshi ZHANG Renji YAN Yongnian
Key Laboratory for Advanced Materials Processing Technology Ministry of Education,Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
国际会议
北京
英文
91-95
2008-11-06（万方平台首次上网日期，不代表论文的发表时间）