摘要
采用微弧氧化法在钛合金表面制备二氧化钛膜层(即生物医学用陶瓷膜),利用SEM、XRD和EDX对膜层的物相结构、形貌和元素组成进行了分析。研究了电解液pH值和微弧氧化电压对微弧氧化过程的影响。结果表明:随着电解液pH值和微弧氧化电压的升高,膜层表面孔洞数量增加,孔径增大,膜层更加均匀;膜层主要由锐钛矿型和金红石型二氧化钛组成,且金红石相含量随微弧氧化电压的升高而增加;微弧氧化电流密度随氧化时间的延长先增大后减小,随电解液pH值的增大而增大。当电解液pH值为11、微弧氧化电压为500V时,可制得多孔状陶瓷膜,且其孔洞分布均匀。
Titanium dioxide films （i. e. biomedical ceramic films） were prepared on titanium alloy surface by micro-arc oxidation,and their structure, morphology and elemental composition were analyzed by XRD, SEM and EDX. The influences of electrolyte pH and micro-arc oxidation voltage on micro-arc oxidation process were investigated. The results show that with electrolyte pH and micro-arc oxidation voltage in- creasing,the film is more homogenous and its surface pores are of larger number and size. The film is mainly composed of anatase and rutile Ti02 and the content of anatase phase increases with the increase of micro-arc voltage. The current density increases at first and then decreases with oxidation time increasing, and meanwhile it increases as electrolyte pH increases. The porous ceramic film can be obtained under the conditions of electrolyte pH value of 11 and micro-arc oxidation voltage of 500 V,and the obtained film has homogeneous-distribution pores.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2013年第1期41-44,49,共5页
Rare Metals and Cemented Carbides
关键词
二氧化钛陶瓷膜
微弧氧化
钛合金
电解液pH值
电压
titanium dioxide ceramic film
micro-arc oxidation
titanium alloy
electrolyte pH
voltage
