摘要
为了提高钛合金的表面生物活性,采用在含有钙磷的电解液中对钛合金进行了微弧氧化,得到了含有钙磷的氧化层。研究了微弧氧化溶液浓度和氧化时间对膜层孔洞的影响,讨论了氧化膜中孔洞的形成和氧化膜生长机制。结果表明,在一定的条件下,电解液浓度的升高使得微弧氧化过程中电流密度相对增大,从而使得膜层孔洞增大。随着微弧氧化处理时间的延长,膜层表面的孔洞逐渐变小,最终封闭;膜层内钙含量随微弧氧化处理时间的延长而逐渐增多;膜层内磷含量先是增加,后有下降趋势。
Micro-arc oxidation （MAO） was performed on Ti-6A1-4V alloy in an electrolyte containing calcium and phosphate ions in order to improve Ti alloy surface bioactivity. The oxide coatings containing calcium and phosphate ions were obtained. The effects of concentration of calcium acetate in the electrolyte and precessing time for MAO on structure of the coatings were investigated, and the coatings formation mechanism was discussed. The results show that the increasing of calcium acetate concentration in the electrolyte leads to the increase in current density during MAO, which results in coarser holes in the coatings. With the increasing of MAO time, the hole size on the surface tends to be smaller and the holes are enclosed finally. The content of Ca in the coatings increases with the increasing of MAO time. The content of P in the coatings increases at first and then decreases as MAO time increases.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第1期148-152,共5页
Transactions of Materials and Heat Treatment
基金
上海市重点学科建设(J50503)
上海市自然科学基金(09ZR1422100)
上海市科技创新项目(10YZ94)
关键词
钛合金
微弧氧化
涂层
微观结构
成分
Ti alloys
micro-arc oxidation
coating
structure
composition
