High Resolution Secondary Ion Mass Spectrometry Studies of Lithium in Aluminum

铝中锂的高分辨率二次离子质谱研究

• 批准号: 8612254
• 负责人: Riccardo Levi-Setti
• 金额: $ 37.43万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1991-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8612254&HistoricalAwards=false
• 关键词: Resolution; Secondary; Ion; Mass; Spectrometry

This research has two related goals, as follows: continued improvement of the high resolution scanning ion microprobe analysis system and its application to improved understanding of aluminum-lithium alloys. The program is directed towards quantitative determination of the distribution of lithium in aluminum-lithium alloys. It requires initial studies on the spatial resolution of secondary ion mass spectrometry, creation of standards for the lithium and aluminum ion signal ratios as a function of lithium concentration, and determination of detectability of lithium in aluminum-lithium alloys. Aluminum- lithium alloys will be examined to measure the distribution of lithium in second phases, at grain boundaries, and at fracture surfaces to gain understanding of the segregation of lithium in these alloys. Results will be correlated with transmission electron microscopy studies at Lehigh University. Phase stability in the system will be determined using samples undergoing ion implantation and ageing treatments. Results will be correlated with studies using neutron depth profiling at the National Bureau of Standards.

这项研究有两个相关的目标，具体如下： 高分辨扫描离子探针的改进 分析系统及其应用，以增进对 铝锂合金 该计划旨在 定量测定锂的分布 铝锂合金 它需要对以下方面进行初步研究： 二次离子质谱空间分辨率，建立 锂和铝离子信号比的标准品， 锂浓度的函数，以及 铝锂合金中锂的可检测性。 铝- 将检查锂合金以测量 第二相、晶界和断裂处的锂 表面，以了解锂的偏析， 这些合金。 结果将与传播相关 在利哈伊大学的电子显微镜研究。 相 系统的稳定性将使用样品 进行离子注入和老化处理。 结果将 与使用中子深度剖面的研究相关联， 美国国家标准局。