(1.华南理工大学 机电工程系， 广州 510641；
2. 华南理工大学 材料学院， 广州 510641；
3. 华南理工大学 应用物理系， 广州 510641)
摘 要: 用扫描电子显微镜和透射电子显微镜对未经热处理的钛合金基体等离子喷涂羟基磷灰石生物材料的显微结构、相组成和界面结合进行了观察与分析。结果表明：HA涂层的显微结构疏松，内部有裂纹和孔洞；涂层的相结构中，HA以结晶态和非晶态两种形态存在；HA和基体的界面结合是以物理结合为主，界面明显，没有过渡相，说明基体和涂层之间化学反应不明显。
关键字: 羟基磷灰石(HA)； 等离子喷涂； 涂层； 界面
of hydroxyapatite biomaterial coating
（1. Department of Electro-Mechanical Engineering, South China University of
Technology,Guangzhou 510641, P.R.China；
2. College of Materials, South China University of
Technology, Guangzhou 510641, P.R.China；
3. Department of Applied Physics, South China University of Technology,
Guangzhou 510641, P.R.China）
Abstract:Microstructure characterization was performed on plasma-spray coated hydroxyapatite and its interface with Ti-6Al-4V using scanning and transmission electron microscopy. The amorphous hydroxyapatite，crystalline hydroxyapatite were found near the coating/substrate interface. No reaction phases were found between the coating and the substrate. This indicates that the interfacial bonding in the as-sprayed sample involves basically mechanical of HA coating to the titanium substrate surface.
Key words: microstructure; interface; hydroxyapatite; Ti-6Al-4V
