激光立体成形纯钛腐蚀性能研究  

Study on corrosion behavior of Ti alloy formed by laser solid forming technology

作　　者：高勃[1] 王晓波[1] 陈静[2] 杨海鸥[2] 

机构地区：[1]第四军医大学口腔医学院,陕西西安710032 [2]西北工业大学

出　　处：《临床口腔医学杂志》2005年第10期612-614,共3页Journal of Clinical Stomatology

基　　金：国家863计划资助项目(2002AA336050)

摘　　要：目的:评价激光立体成形纯钛在人工唾液环境下的耐腐蚀性能。方法:采用动电位极化技术,在人工唾液(37℃,pH=6.8)环境中,进行激光立体成形纯钛电化学腐蚀实验,并以常规铸造成形的纯钛作为对照,描记两种纯钛极化曲线图,用扫描电镜观察电化学腐蚀后的界面,分析评估其耐腐蚀性能。结果:采用激光立体成形的纯钛试件与铸造件相比具有较正的自腐蚀电位,较小的自腐蚀电流密度,较低的致钝电位,并且都未出现破裂电位,扫描电镜显示激光立体成形纯钛无明显的腐蚀迹象。结论:用激光立体成形制备的纯钛试件具有较好的耐腐蚀性能,能满足口腔修复体的性能要求。Objective：To evaluate the anti-corrosion property of titanium fabricated by laser solid forming in. artificial saliva. Method：The corrosive behavior of titanium fabricated by casting and laser solid forming were studied by potentiadynamic polarization technique in artificial saliva at 37℃（pH= 6.8）. According to the polarization curves given by the electrochemical corrosive measure system and the picture of corrosive plane give by SEM, the corrosive properties of different titanium were analyzed. Result：It is found that titanium fabricated by laser solid forming has more positive corrosion potential, smaller corrosion current density and lower passive potential, and does not shows evidence corrcsive phenomena. Conclusion： titanium fabricated by laser solid forming has good corrosive resistance in oral circumstances, and can meet the request of dental material.

关 键 词：快速成形 电化学腐蚀 钛 

分 类 号：R783.3[医药卫生—口腔医学]