摘要
为研究柠檬酸(CA)和乙二胺四乙酸二钠(EDTA-2Na)对钛合金微弧氧化膜性能的影响,在含有Ca,P元素的溶液中对钛合金进行微弧氧化处理,对添加配位剂前后陶瓷膜的化学成分、微观形貌、润湿性能和显微硬度进行了研究。结果表明,CA和EDTA-2Na均能促进微弧氧化膜中羟基磷灰石的形成,其中CA使氧化膜中Al的比例降低至2.7%;EDTA-2Na则促进CaTiO3的形成,并使氧化膜表面Ca/P原子百分比提高至1.83。加入上述两种配位剂后,微弧氧化膜均能保持良好的润湿性能。虽然加入配位剂后氧化膜的显微硬度有所下降,但仍接近Ti6Al4V合金基体硬度的2倍。
Ti6A14V alloy was treated by micro-arc oxidation ( MAO) in an electrolyte containing Ca and P. The chemical compo-sition,micro-morphology,wettability,and microhardness of the oxi-dation films prepared in the presence and absence of complexing a-gents citric acid (CA) and disodium ethylene-diamine-tetraacetate (EDTA-2Na) were analyzed,aiming at revealing the effects of the complexing agents on the microstructure and properties of the micro-arc oxidation films on Ti6A14V alloy. Results show that both CA and EDTA-2Na could promote the formation of hydroxyapatite (HAP). The addition of CA reduced the content of Al in the oxidation film to about 2.74%,while EDTA-2Na induced the production of CaTiO3 and increased the Ca/P ratio of the film to 1. 83. MAO films were still well wetted after the addition of the complexing agents. Moreo-ver,although the microhardness of the MAO film was reduced with the addition of the complexing agents,it was still about twice as much as that of Ti6A14V alloy substrate.
出处
《材料保护》
CAS
CSCD
北大核心
2009年第3期1-4,共4页
Materials Protection
基金
国家"973"计划课题(2007CB607605)
清华大学摩擦学国家重点实验室开放基金资助项目(SKLTKF08A01)
关键词
微弧氧化
钛合金
配位剂
润湿性
显微硬度
titanium alloy
micro -arc oxidation fo
,film
complexing agents
properties
