铝表面高压阳极氧化膜层结构分析

采用X射线衍射（XRD）、扫描电镜（SEM）和X射线光电子能谱（XPS）综合分析了铝在磷酸和钨酸钠体系中形成的高压阳极氧化膜的成分、形貌和结构。XPS结果表明,氧化膜的主要组成元素为O和Al,同时夹杂有少量的P和W。SEM分析发现,氧化膜呈网状结构,孔隙率约为10个／μm^2,孔径大小为0．15－0．20μm。氧化膜大致可以分为紧密层和疏松层两层。紧密层、疏松层、基体三者之间相互交错,紧密相连。SEM显示,紧密层和疏松层中均存在大量的龟裂纹。XRD分析表明,氧化膜呈现非晶态结构,以铝的氧化物主要组成成份,同时杂有少量的磷酸盐或钨酸盐。     

注碳外延硅的荧光特性研究

研究了注碳外延硅经氢气退火及电化学腐蚀处理后的荧光特性。经能量为50keV,剂量为2×1016cm-2的碳离子注入后的外延单晶硅片,在氢气氛下高温退火及电化学腐蚀处理。荧光谱仪分析表明电化学腐蚀是蓝光发射的前提,并且不同的电化学腐蚀条件对发光强度和峰位影响极大。不同的激发光波长亦可影响发光谱的峰位。     

新型冲击速度传感器

根据冲击波物理实验的需要，利用改进的阳极化工艺，在铝杆半球形的表面均匀地生成厚约5．5μm的Al2O3电介质膜，其直流绝缘强度可达250V，1min，低冲击压力作用下的电脉冲前沿约50ns。满足了冲击压缩实验对传感器高精度、高可靠性、高度可重复和大批量的要求。     

氧化铝多孔膜红外吸波性能的研究

在铬酸中采用直流恒压铝阳极氧化法制备氧化铝多孔膜,经测试这种多孔膜具有红外吸波性能。同进随氧化铝多孔膜孔隙度的增加,在１２５０－４１７ｃｍ＾１波段的红外发射光谱呈下降趋势。     

Fabrication of alumina films with laminated structures by ac anodization

Anodization techniques by alternating current (ac) are introduced in this review. By using ac anodization, laminated alumina films are fabricated. Different types of alumina films consisting of 50–200 nm layers were obtained by varying both the ac power supply and the electrolyte. The total film thickness increased with an increase in the total charge transferred. The thickness of the individual layers increased with the ac voltage; however, the anodization time had little effect on the film thickness. The laminated alumina films resembled the nacre structure of shells, and the different morphologies exhibited by bivalves and spiral shells could be replicated by controlling the rate of increase of the applied potentials.     

阳极氧化法制备TiO2纳米管阵列

采用阳极氧化法在乙二醇体系电解液中制备TiO2纳米管阵列,获得了长度为15~20μm的底端纳米管与顶端纳米线的新型复合结构。讨论了电解液中不同含水量对该复合结构形成的影响,并采用两步阳极氧化法对该结构的形成机理进行了分析。结果表明,当乙二醇体系电解液含有0.4%(质量分数)NH4F和2%(体积分数)H2O时,电解液腐蚀速度适中,纳米管上端部分被选择性腐蚀,最终形成纳米管与纳米线的复合结构。     

Corrosion resistance improvement of Ti-6Al-4V alloy by anodization in the presence of inhibitor ions

Colorful thin oxide films were synthesized by galvanostatic anodization on Ti-6Al-4V alloy. Three different aqueous solutions containing corrosion inorganic inhibitors (Na₂MoO₄, NaH₂PO₄ and NH₄VO₃) were employed for the anodization treatment. The effect of inhibitor anions on the corrosion behavior of the alloy in Ringer solution was studied. Open circuit potential (OCP), Tafel polarization, linear sweep voltammetry (LSV) and chronoamperometry (CA) were performed to evaluate the corrosion performance of the treated electrodes. The incorporation of the inhibitor ions was detected by the release of Mo, V and P through ICP-AES technique. The formed oxides were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results show that compact, amorphous oxides without pores or cracks were obtained independently of the solution used. The sample anodized in Na₂MoO₄ solution registered the lowest corrosion current density (0.11 μA/cm²), and it was able to protect the alloy even after 168 h of immersion in Ringer solution. No cracks or corrosion products were detected. The XPS analysis reveals the incorporation of molybdenum to the oxide film in the form of Mo⁶⁺ and Mo⁴⁺.     

不锈钢阳极保护冷却器在葫芦岛锌厂的应用

对冶炼尾气制酸装置中的传统冷酸器与新型的阳极保护冷却器进行了比较，阐述了新型阳极保护冷却器的工艺设计参数，阳极保护的原理及控制系统，介绍了开车调试及运行中的酸温、酸浓度与阳极电流的关系，并提出了对阳极保护冷却器的改进意见。     

激发波长和电化学腐蚀对注碳外延硅荧光特性的影响

电化学腐蚀是蓝光发射的前提,但不同的电化学腐蚀条件对发光强度和峰位影响极大,随着电化学腐蚀条件的加强,蓝光峰将被红光峰代替。激发光波长亦可影响蓝光发射,如260nm的激发光将引起在360nm光激发下所获得的431nm蓝光峰的蓝移。     

硬质阳极氧化在弹上的应用

硬质阳极化已在机械及航空工业中逐渐推广应用,但在武器弹药方面应用甚少。本文简要阐述了硬质阳极化处理在反坦克超速脱壳穿甲弹和航空火箭弹上的应用及其对战术使用性能的影响。