摘要
对高纯铝片进行电化学抛光处理,发现在Al表面形成纳米级条纹状的自组织结构。采用原子力显微镜对这种结构进行研究,发现在不同的抛光条件下,条纹状纳米结构的尺寸和有序程度都发生改变。同时对这种有序结构的形成机理进行了解释,认为在抛光过程中,电解液里极性分子在铝表面的屏蔽效应使得Al表面各处溶解速度不同,导致自组织条纹的形成。
High purity Al sheets (99.99 wt%) were electropolished at different voltages of electropolishing and their stripes were investigated by AFM. The highly ordered stripe-like nanostructures can be obtained only within a narrow range of processing parameters. The stripe deficiencies, such as stripe-cross and stripe-convergence, within parallel stripes, can be seen on surface defects, which do not fundamentally affect the orientation of the stripes. Highly ordered stripes with various wavelengths can be obtained through changing die voltage of electropolishing. The polar molecules (ethanol) play an important role for the stripes formation, so when the voltage of electropolishing is different the wavelength of stripes changes. Using this character, the highly ordered stripes can be produced with controllable scale. The Al sheets with stripes is anodized to form ordered porous alumina, the stripe structures vanished.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2006年第4期123-125,共3页
Transactions of Materials and Heat Treatment
基金
深圳大学科技基金(200623)
关键词
铝表面
氧化铝模板(AAO)
原子力显微镜(AFM)
条纹结构
Alumina
Anodic oxidation
Atomic force microscopy
Defects
Electric potential
Electrolytic polishing
Ethanol
Structure (composition)
Surfaces
