喷涂工艺参数对HA涂层结构和结晶度的影响  

Influence of microplasma spray parameters on the microstructure and crystallinity of hydroxyapatite coatings

作　　者：贺定勇[1] 赵秋颖[1] 赵力东[2] 孙旭峰[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100022 [2]德国亚琛工业大学表面工程研究所,亚琛d52070

出　　处：《材料研究学报》2007年第6期659-663,共5页Chinese Journal of Materials Research

基　　金：北京市教委科技发展计划重点基金KZ200610005002;2006年度留学人员科技活动择优资助基金;北京工业大学博士科研启动基金12700141资助项目~~

摘　　要：用微束等离子喷涂在TiAl6V4基体上制备羟基磷灰石涂层,研究了喷涂电流、喷涂距离和气流量等参数对其显微结构和结晶度的影响.结果表明,通过调整喷涂工艺参数可获得三类不同结构的涂层.第一类结构含有大量未融化HA颗粒,第二类结构呈典型层状且具有强织构,第三类结构层状结构不明显.前两种结构的结晶度较高,第三类结构的结晶度较低.由二和三类结构复合而成的梯度涂层,能够适应植入体涂层快速形成类骨磷灰石和保持稳定性的双重要求.HA coatings was deposited on TiAl6V4 substrate using a finer hydroxyapatite spray powder-53 μm and a new plasma spray process ＂microplasma spraying＂ in this study, and the influence of spray parameters on the coating microstructure and crystallinity was investigated. It was found that three different coating structures could be obtained by changing spray parameters. The first structure can be characterized by many unmolten HA particles embedded in the coatings. The second one can be characterized by a typical lamellar coating structure and a high texture content. The third one can be characterized by high content amorphous phase, leading to less grain boundaries in the coatings. The coatings both with the first coating structure and the second one have high coating crystallinities. The functionally graded coating combined with the second and the third structure satisfied the need of rapid apatite layer forming speed in early stage and long term stabilization after being embedded.

关 键 词：材料表面与界面 羟基磷灰石 微束等离子喷涂 生物涂层 喷涂工艺参数 

分 类 号：TB333[一般工业技术—材料科学与工程]