摘要
硅酸钠是影响微弧氧化过程和微弧氧化膜结构的重要因素之一。采用恒压模式,以Na2SiO3,CH3COONa,EDTA.2Na为溶液,在TC4钛合金表面微弧氧化制备了陶瓷涂层,研究了Na2SiO3浓度对起弧电压,电极电流,陶瓷膜厚度、表面形貌、粗糙度以及陶瓷膜相组成的影响。结果表明:Na2SiO3有降低起弧电压和电极电流的作用;随Na2SiO3浓度的增大,陶瓷膜厚度、表面粗糙度增加;陶瓷膜层主要由锐钛矿型TiO2、金红石型TiO2和无定型硅氧化物相组成,随Na2SiO3浓度的增加,陶瓷膜中的无定型硅氧化物相对含量增加。
Na2SiO3 was introduced into the electrolyte composed of CH3COONa and EDTA·2Na to prepare micro-arc oxidation ceramic coatings on the surface of TC4 Ti alloy in a constant voltage mode.The effect of Na2SiO3 concentration on striking voltage and electrode current as well as thickness,morphology,surface roughness and phase composition of the ceramic coatings was investigated.Results indicate that Na2SiO3 is able to decrease the striking voltage and electrode current.The thickness and surface roughness of the ceramic coatings increased with increasing concentration of Na2SiO3.The ceramic coatings were composed of rutile and anatase as well as amorphous silicon oxide,and the content of amorphous silicon oxide in the coatings also increased with increasing concentration of Na2SiO3.
出处
《材料保护》
CAS
CSCD
北大核心
2011年第2期14-16,6-7,共3页
Materials Protection
关键词
微弧氧化
钛合金
硅酸钠
陶瓷膜
电极参数
micro-arc oxidation
titanium alloy
sodium silicate
ceramic coatings
electrode parameters
