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硼酸盐微弧氧化TiO2涂层微孔结构及亲水性研究

发表时间:2015-12-15  浏览量:1427  下载量:600
全部作者: 李耀天,王伟强,刘振飞,齐民
作者单位: 大连理工大学材料科学与工程学院
摘 要: 采用Li2B4O7,Na2B4O7,K2B4O7 3种四硼酸盐的水溶液作为电解液,通过微弧氧化法在钛表面制备出具有蠕虫状微米级沟槽,并且沟槽上含有纳米级孔坑的纳米微米双重结构的二氧化钛涂层。通过扫描电子显微镜(scanning electron microscope,SEM)、X-射线衍射(X-ray diffraction,XRD)以及接触角等研究了所形成的涂层形貌、结构及亲水性。结果表明,3种四硼酸盐作为电解液微弧氧化均可以形成沟槽状表面形貌,不同四硼酸盐表面形貌略有不同,四硼酸钾表面比较平滑,四硼酸钠略有微坑,四硼酸锂多纳米微坑。同时,分析了不同阳离子的四硼酸盐形成膜层形貌上的差异以及形成原因。研究为进一步认识微弧氧化机理奠定基础。
关 键 词: 材料表面与界面;钛;微弧氧化;微纳米双重孔结构;亲水性
Title: A study on the pores structure and hydrophily of TiO2 coating prepared by micro-arc oxidation in tetraborates
Author: LI Yaotian, WANG Weiqiang, LIU Zhenfei, QI Min
Organization: School of Material Science and Engineering, Dalian University of Technology
Abstract: Using three tetraborates of Li2B4O7, Na2B4O7, K2B4O7 as electrolyte, coatings with micro/nano dual porous TiO2 were formed on the surface of Ti through micro-arc oxidation. The morphology, structure and hydrophily of the coatings were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and contact angle measurement, respectively. The results showed that cortex-like slots are formed in all three electrolytic solutions of tetraborates. But morphologies are different in different electrolytic solution. Surface of coating in K2B4O7 electrolytic solution is smooth, that in Na2B4O7 electrolytic solution has a few nano dimples on ridges, while that in Li2B4O7 electrolytic solution has more nano dimples on ridges. The above morphologies and formation mechanism were analyzed, which lays a foundation on further understanding of the mechanism of micro-arc oxidation.
Key words: surface and interface in the materials; Ti; micro-arc oxidation; micro/nano dual pores; hydrophily
发表期数: 2015年12月第23期
引用格式: 李耀天,王伟强,刘振飞,等. 硼酸盐微弧氧化TiO2涂层微孔结构及亲水性研究[J]. 中国科技论文在线精品论文,2015,8(23):2497-2501.
 
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