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氧化电压对多孔阳极氧化铝膜结构及形成的影响 总被引:3,自引:1,他引:2
以草酸为电解液研究了氧化电压对多孔阳极氧化铝膜的影响,采用场发射扫描电子显微镜(FE-SEM)对多孔阳极氧化铝膜的表面形貌进行表征.结果表明:氧化电压决定多孔阳极氧化铝膜纳米孔的大小;在一定电压范围内,氧化膜厚度随氧化电压的升高而增加.电流密度与氧化时间的关系曲线表明:在不同电压下多孔阳极氧化铝膜的形成历程基本相同,但形成多孔氧化铝膜时的电流密度随氧化电压的升高而增加.XRD分析结果证实:多孔氧化铝膜由非晶态的Al2O3组成,其组成不随阳极氧化电压而变化. 相似文献
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影响多孔阳极氧化铝膜结构特性因素的研究 总被引:4,自引:0,他引:4
酸性电解液中采用电化学方法可在铝表面形成多孔阳极氧化铝膜。研究了影响膜孔径和膜厚的关键因素,包括电解液、氧化电压、温度和时间。此外,通过X-射线衍射和扫描电镜,分析了形成氧化膜的微观形貌和晶体结构。实验结果表明多孔阳极氧化铝膜结构特性依赖于采用的氧化条件、电解液、氧化时间和电压的选择。 相似文献
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以2024铝合金做基体进行柠檬酸-硫酸阳极氧化,研究了电压对柠檬酸阳极氧化膜的微观形貌、成分、厚度、显微硬度和耐腐蚀性的影响,并分析了柠檬酸在阳极氧化中的作用机理.结果表明:添加柠檬酸使电解液对阳极氧化膜的腐蚀溶解作用减弱,提高了成膜效率并且有利于阳极氧化膜较均匀溶解,从而提高致密度和性能.随着电压升高(8~22 V)... 相似文献
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电流密度对AZ31B镁合金阳极氧化及膜层性能的影响 总被引:2,自引:1,他引:1
采用KOH-Na2SiO3-Na2B4O7-Na2CO3环保型电解液体系,研究了电流密度对AZ 31B铁合金阳极氧化过程、氧化膜微观形貌、膜层厚度、氧化膜耐蚀性等的影响.结果表明:在恒电流阳极氧化过程中,根据电压-时间曲线,阳极氧化过程可分为电压快速升高阶段、电压缓慢升高阶段、电压相对稳定阶段.随着电流密度的增大,电压-时间曲线的斜率增大,电压明显增大,点火时间缩短,但对击穿电压影响不大;随着电流密度的增加,膜层致密性、厚度、耐蚀性都呈先增大后减小的趋势.当电流密度为1.5 A/dm2时,阳极氧化膜的致密性和耐蚀性最好. 相似文献
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Oxide films have been produced on AM60B magnesium alloy using plasma electrolytic oxidation process in an alkaline phosphate electrolyte with and without addition of titania sol. The microstructure and composition of the oxide films were analyzed by Scanning Electron Microscope (SEM), X-ray Photoelectron Spectroscope (XPS) and X-ray Diffraction (XRD). The corrosion resistances of the oxide films were evaluated using potentiodynamic polarization measurements in 3.5 wt% NaCl solution. It is found that the oxide film containing crystalline rutile and anatase TiO2 compounds are produced in an alkaline phosphate electrolyte with addition of titania sol. The oxide film formed in electrolyte with addition of titania sol has more uniform morphology with less structural imperfections than that formed in electrolyte without addition of titania sol. The results of potentiodynamic polarization analysis show that the oxide film formed in the present modified electrolyte is successful in providing superior corrosion resistance for magnesium alloy. 相似文献
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Ho-Sung Noh Ji-Won Son Heon Lee Ho-Il Ji Jong-Ho Lee Hae-Weon Lee 《Journal of the European Ceramic Society》2010,30(16):3415-3423
The suppression of Ni agglomeration in Ni-yttria stabilized zirconia (Ni-YSZ) nano-composite thin films deposited by pulsed laser deposition (PLD) has been investigated by varying post-annealing temperatures at a range of 800–1200 °C. Grain growth to a certain extent appears to be necessary to obtain a stable Ni-YSZ composite microstructure by suppressing massive Ni agglomeration. The microstructurally stable and uniform nano-porous Ni-YSZ thin film was obtained by 1200 °C post-annealing and reduction of the NiO–YSZ thin film, and it was applied as the surface modification layer of the bulk anode support used in conventional solid oxide fuel cells (SOFCs). By this approach, we were able to successfully realize a thin film electrolyte SOFC exhibiting the open cell voltage (OCV) higher than 1 V with a 1-μm thick film electrolyte on the porous anode support. 相似文献
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锡盐着色膜颜色与氧化膜中Sn含量的关系 总被引:1,自引:0,他引:1
对锡盐电解着色膜的颜色深浅与氧化膜中Sn含量两者之间的关系进行了研究。此外还探讨了锡盐电解着色液中镍离子和亚铁离子在电解着色过程中所起的作用。 相似文献