TA2纯钛表面微弧氧化膜的成分和相结构分析  

Composition and Phase Structure of Microarc Oxidation Coatings Deposited on TA_2 Pure Titanium

作　　者：薛文斌[1,2] 王超[1,2] 马辉[1] 谢孟峡[1] 陈如意[1,2] 邓志威[1,2] 

机构地区：[1]北京师范大学 [2]北京市辐射中心,北京100875

出　　处：《稀有金属材料与工程》2002年第5期345-348,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(59801003); 国家"863"计划(863-715-011-020); 北京市科技新星计划(9558102500)

摘　　要：采用交流微弧氧化方法,在铝酸盐溶液中的TA2纯钛表面沉积一层厚度达30μm的氧化物陶瓷膜,并用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)、Raman光谱研究了氧化膜的成分和相结构。研究表明:该氧化膜具有内外两层结构,分别厚约15μm;氧化膜由TiAl2O5相和金红石型TiO2相组成,但外层膜里TiAl2O5相含量比内层膜里高得多,金红石则主要分布在膜内层里;来自溶液的铝原子已扩散到膜/钛基体界面,但膜外层的铝含量比内层高得多;微弧放电区瞬间高温高压过程对纯钛基体没有影响,Al,O原子都没有扩散进入未氧化的钛基体。Ceramic oxide coatings 30 mum in thickness were produced on TA2 pure titanium by AC microarc oxidation in aluminate solution. The composition and structure were investigated by scanning electron microscopy (SEM) with-energy dispersive spectroscope (EDS), X-ray diffractometry (XRD), and raman spectroscopy. The coatings contain, two layers: an outer layer and an internal layer. The oxide coatings consist of TiAl2O5 and rutile-type TiO2 phase. The content of TiAl2O5 phase in the outerlayer is much higher than in the internal layer. However, most of the rutile is distributed in the internal layer coating. EDS analyses shows that the aluminum a toms from the aqueous solution have diffused into the whole oxide coating, but are enriched in the outer layer. On the other hand, the aluminum and oxygen atoms have not entered into the titanium substrate. So the microarc discharge has hardly any influence on the titanium substrate.

关 键 词：微弧氧化 纯钛 相结构 陶瓷膜 

分 类 号：TG174.45[金属学及工艺—金属表面处理]