电解液组分对TA2纯钛微弧氧化多孔涂层结构及性能的影响
Effect of Electrolyte Composition on the Structure and Properties of Micro-Arc Oxidation Porous Coatings on TA2 Pure Titanium
杨旭东 1冯军 1但敏 2赵颖超 1王俊 1袁绍华 1齐华荣1
作者信息
- 1. 南华大学机械工程学院,湖南 衡阳 421001
- 2. 核工业西南物理研究院,四川 成都 610041
- 折叠
摘要
为了探究孔隙率对生物活性涂层综合性能的影响,采用微弧氧化技术在TA2纯钛表面制备了TiO2涂层.通过改变电解液中Na2B4O7与NaOH的浓度,在恒流模式下探讨了电解液组分对微弧氧化涂层的物相组成、微观形貌、硬度、厚度和亲水性的影响.结果表明:涂层的物相主要为金红石TiO2相,涂层的物相组成、形貌、厚度、硬度和耐磨性受NaOH与Na2B4O7浓度的影响均较大.适量添加NaOH可以提升涂层的厚度、孔隙率、硬度、耐磨性和耐蚀性,但当NaOH浓度过高时,孔隙率下降,涂层性能下降.电解液配方为0.15 mol/L NaOH、0.10 mol/LNa2B4O7时,制备出的涂层具有"类骨小梁"状多孔结构,孔隙率较高,综合性能较好.
Abstract
In order to investigate the effect of porosity on the comprehensive performance of bioactive coatings,a TiO2 coating was prepared on the surface of TA2 pure titanium using micro-arc oxidation.By varying the concentrations of Na2 B4 O7 and NaOH in the electrolyte,the effects of electrolyte composition on the phase composition,microstructure,hardness,thickness and hydrophilicity of the micro-arc oxidation coating were examined under constant current mode.Results showed that the coating phase was primarily rutile TiO2 .The phase composition,morphol-ogy,thickness,hardness and wear resistance of the coating were significantly affected by the concentrations of sodium hydroxide and sodium tetraborate.Moderate addition of NaOH can enhance the thickness,porosity,hardness,wear resistance and corrosion resistance of the coating.However,when the concentration of sodium hydroxide was too high,porosity decreased and coating performance was reduced.When the elec-trolyte formula was 0.15 mol/L NaOH and 0.10 mol/LNa2B4O7,a porous coating with a "trabecular bone-like" structure was prepared,ex-hibiting high porosity and good comprehensive performance.
关键词
微弧氧化/氧化钛/多孔涂层/亲水性/耐蚀性/耐磨性Key words
micro-arc oxidation/titanium oxide/porous coating/hydrophilicity/corrosion resistance/wear resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据