作　　者： ; ; ; ; ; ;

机构地区： 沈阳工业大学材料科学与工程学院

出　　处： 《沈阳工业大学学报》 2008年第6期653-657,共5页

摘　　要： 针对医用钛合金在临床应用中易出现耐磨性差、有毒合金元素溶解引起生理病变等问题,采用化学反应法在医用Ti6Al4V合金基材及其激光氮化改性层表面制备羟基磷灰石(HA)涂层.采用扫描电子显微镜(SEM)、能谱仪(EDAX)对改性层的组织形貌及成分进行分析.结果表明,钛合金表面经过酸碱及生物活性预钙化处理,其沉积类骨磷灰石能力明显增强,经过激光氮化改性的钛合金沉积速率及沉积效果均优于Ti6Al4V基体合金.试验证明,激光氮化改性可改善钛合金的生物相容性. To solve such problems in the clinical application of titanium alloys as the poor wear resistance and the physiological malady from the dissolution of toxic alloying elements, the hydroxyapatite deposit on the substrate and laser gas nitriding layer of Ti6Al4V titanium alloy was prepared by chemical deposition method. The chemical composition and microstructures of the coating were investigated using SEM and EDAX. The results indicate that the deposition ability of hydroxyapatite on the titanium alloy gets obviously enhanced after acid and alkali treatment as well as precalcific treatment, and the deposition speed and effect on the alloy subjected to laser gas nitriding treatment are superior to those on the Ti6Al4V substrate. The laser gas nitriding can effectively increase the bioactivity of the alloy.

关 键 词： 生物材料 钛合金 激光气体氮化 羟基磷灰石 化学沉积

领　　域： [电子电信]