为了探究单一体系电解液制备氧化钛陶瓷层的性能,采用恒电流微弧氧化法,以NaOH为电解液在金属钛表面上制备了氧化钛陶瓷膜,探讨了电流密度、NaOH浓度对物相组成、微观形貌、膜层厚度、硬度和耐磨性的影响。结果表明:物相组成、形貌、氧化膜厚度、硬度和耐磨性受电流密度和NaOH浓度影响均较大。随着电流密度的升高,膜层中氧化钛金红石的含量上升,表面形貌变得更加粗糙且孔隙率增加,膜层厚度随之变厚,硬度明显提升;随着NaOH浓度的升高微弧氧化膜层中金红石的含量上升,表面形貌变得更加粗糙且孔隙率增加,厚度随之变厚,硬度有明显提升,耐磨性变化无明显规律。
In order to investigate the performance of titanium oxide ceramic layer prepared by a single electrolyte system, a titanium oxide ceramic film was prepared on the surface of titanium using NaOH as electrolyte. The effects of current density and NaOH concentration on phase composition, micromorphology, oxide film thickness, hardness and wear resistance were investigated. Results showed that the phase composition, micromorphology, oxide film thickness, hardness and wear resistance were greatly affected by current density and NaOH concentration. With the increase of current density, the content of rutile titanium oxide in the film increased, the surface morphology became rougher, the porosity increased, the film became thicker, and the hardness increased obviously. With the increase of NaOH concentration, the content of rutile in the micro-arc oxidation film increased, the surface morphology became rougher, the porosity and thickness increased, the hardness increased significantly, and the wear resistance changed without obvious regularity.
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