Influence of electrolyte composition on microstructure and properties of coatings formed on pure Ti substrate by micro arc oxidation
Influence of electrolyte composition on microstructure and properties of coatings formed on pure Ti substrate by micro arc oxidation
复制标题
电解液成分对纯钛基体微弧氧化镀层组织与性能的影响
DOI：
10.1016/j.surfcoat.2018.06.024
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发表时间：
2018-09
影响因子：
5.4
通讯作者：
Jian Chen
中科院分区：
文献类型：
--
作者：
Jian Chen
研究了在含K2ZrF6或K2TiF6的电解液中，电解液组分如何加入到钛合金微弧氧化（MAO）膜中，并对膜的表面特性进行改性。采用扫描电镜（SEM）、X射线能谱仪（EDS）和X射线衍射仪（XRD）对微弧氧化膜的微观结构进行了表征。评价了涂层的维氏硬度、耐蚀性和耐磨性。结果表明，在K2TiF6溶液中，起弧时间短，起弧电压低，涂层生长速度快。与基础液中制备的微弧氧化膜相比，添加K2ZrF6或K2TiF6的电解液中制备的微弧氧化膜具有自封闭的微观结构，硬度有所提高。ZrO2改性的微弧氧化涂层具有优异的摩擦学性能，K2TiF6添加剂的涂层具有最好的耐腐蚀性能。进一步揭示了电解质组成、微观结构和性能之间的相关性。
The aim of this work is to study how electrolyte composition incorporates into the prepared micro arc oxidation (MAO) coatings on titanium in electrolytes containing K2ZrF6or K2TiF6and modify the surface characteristics. The microstructure of MAO coatings were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectrometry (EDS) and X-Ray Diffractometer (XRD). Vickers hardness, corrosion resistance and wear resistance of these coatings were evaluated. The obtained results showed that arcing phenomenon could be affected by the electrolyte composition, and it occurred with short arc starting time and low arc starting voltage in the solution with K2TiF6addition, resulting in an increasing growth rate of the coating. Compared with the MAO coating prepared in the base solution, the MAO coating formed in electrolyte with K2ZrF6or K2TiF6additives showed a self-sealing microstructure, exhibiting improved hardness. The ZrO2-modified MAO coating showed an excellent tribological behavior and the coating with K2TiF6addition exhibited the best corrosion resistance. Furthermore, the correlation of the electrolyte composition, microstructure and properties had been revealed.
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