Studies of Etching Microstructures on Metals

金属蚀刻微观结构的研究

• 批准号: 9006895
• 负责人: Kurt Hebert
• 金额: $ 22.68万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-01 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9006895&HistoricalAwards=false
• 关键词: Studies; Etching; Microstructures; Metals

This research investigates localized etching phenomena which occur in metals and nonmetals. The program explores the factors that determine where etch pits initiate and how they grow. For instance, in aluminum and some other metals etch pits can exhibit oxide passivation at their sidewalls; this leads to etching of deep micron-sized cavities with constant sidewall widths. Sites of pitting are correlated with surface composition profiles determined by scanning transmission electron microscopy. Important variables that are controlled through systematic processing include dislocation substructure, impurity segregation, and vacancy concentration. The model system selected for these studies is aluminum etched in chloride solutions. The ultimate goal is to use the information on etch pit initiation gained from this research to preprogram specific patterns of etch pitting on metal surfaces.

本研究调查了局部蚀刻现象， 存在于金属和非金属中。 该计划探讨了这些因素 决定了蚀坑的起始位置和生长方式。 为 例如，在铝和一些其它金属中，蚀刻坑可表现出 氧化物钝化在他们的侧壁;这导致蚀刻 具有恒定侧壁宽度的深微米尺寸的空腔。 网站 点蚀的发生与表面成分分布有关 通过扫描透射电子显微镜测定。 通过系统控制的重要变量 处理包括位错亚结构、杂质 偏析和空位集中。 模型系统 在这些研究中选择的是在氯化物中蚀刻的铝 解决方案 最终目的是利用蚀刻上的信息 从这项研究中获得的坑启动， 金属表面的蚀坑图案。