摘要
利用微弧氧化技术,采用甘油磷酸钙和乙酸钙混合电解液体系,在Ti6Al4V钛合金表面制备了陶瓷涂层,并对涂层的结构特征进行了综合研究。试验结果表明,微弧氧化层为富含Ca、P元素的粗糙多孔结构。陶瓷层可分内外两层,内层薄而致密,存在分布较为均匀的细小孔洞。外层厚而多孔,孔径尺寸和深度随氧化电压的升高而增大。陶瓷层中Ca、P元素分布不均匀,内表面Ca元素含量明显低于外表面,而P元素含量内、外表面相近,在陶瓷层的次表层二者的含量相对最高。微弧氧化后钛合金基体表面变的粗糙不平,并有少量Ca、P元素扩散进入到钛合金基体表层。
Microarc oxidation was used to prepare ceramic oxide layer on the surface of Ti6A14V alloy in CaC3Hs（OH）2PO4-Ca（CH3COO）2 aqueous solution. The microstructure of the coating was analyzed synthetically. The experimental results showed that a porous ceramic film containing calcium and phosphate on surface of Ti6A14V alloy was acquired. This ceramic film was divided into two films of the inner and outer layers. The thin and compact inner layer contained the equably distributed small holes. The outer layer was thick and porous. The size and depth of these holes increased with an increase of the voltage. Ca and P distibuted unevenly in ceramic film. The content of Ca in inner layer was higher than that in outer layer, but P concentration was almost even in inner and outer layers. And the content of Ca and P was highest in the secondary surface layer. The surface of Ti6A14V alloy after microarc oxidation became rough and a little Ca and P diffused into substrate
出处
《中国表面工程》
EI
CAS
CSCD
2007年第5期11-15,18,共6页
China Surface Engineering
基金
江苏省自然科学基金(BK2005019)
中国矿业大学基金项目(2005B032)
关键词
钛合金
微弧氧化
陶瓷涂层
显微结构
titanium alloy
microarc oxidation
ceramic coating
micro-structure
