Beam Induced Surface Alloying: Metastable Phases

光束诱导表面合金化：亚稳态相

• 批准号: 8618761
• 负责人: James Mayer
• 金额: --
• 依托单位: Cornell University
• 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: 1987-03-15 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8618761&HistoricalAwards=false
• 关键词: Beam; Induced; Surface; Alloying; Metastable

This collaborative program of research between J. W. Mayer, Cornell University; S. S. Lau, University of California (San Diego); and J. M. Poate, AT&T Bell Laboratories at Murray Hill will investigate ion- induced formation of crystalline, metastable phases. The study will emphasize three major areas: 1) aluminum-transition metal systems with emphasis on ion-induced formation of the quasicrystalline, icosahedral structure, 2) direct, hot substrate, ion-induced transformations to the metastable phase in binary systems near deep eutectics, and 3) formation of metastable phases in ternary systems using ion irradiation of metallic alloys on silicon or germanium and of germanium-silicon alloys on metal films. The primary analytical approach will be based on Rutherford backscattering, x-ray diffraction, transmission electron microscopy and in-situ electrical measurements. The research is a continuation of a previously successful and productive investigation under support from the NSF (DMR-8106843). Research on beam-induced metastable phases is a promising path to the development of new classes of materials with unique surface and electronic properties. The objective of the research is to provide important information on the physics of these new materials and on the range of new compositions and properties that may be available. Fundamental understanding is needed in this area to provide guidance for materials scientists and engineers who are now seeking new materials and processing techniques. The research will also have a significant impact on the production of qualified researchers in the field of materials science and electronics.

这个合作研究项目由J. W。迈耶 大学; S. S.刘，加州大学（圣地亚哥）和J。 位于默里山的AT T贝尔实验室将研究离子- 诱导形成结晶的亚稳相。 这项研究将 强调三大领域：1）铝-过渡金属体系， 强调离子诱导形成的准晶，二十面体 结构，2）直接，热基板，离子诱导的转变， 二元系中深共晶附近的亚稳相; 利用离子辐照在三元体系中形成亚稳相 在硅或锗上的金属合金和锗-硅的 金属薄膜上的合金。 主要分析方法将基于 卢瑟福背散射，x射线衍射，透射电子 显微镜和原位电测量。 这项研究是以前成功的研究的延续， 在NSF（DMR-8106843）的支持下进行生产性研究。 束流诱导亚稳相的研究是实现这一目标的一条有前途的途径 开发具有独特表面的新型材料， 电子特性 研究的目的是提供 关于这些新材料的物理学和 一系列新的组合物和性能，可能是可用的。 需要对这一领域有基本的了解，以指导 材料科学家和工程师现在正在寻找新材料， 加工技术 这项研究也将产生重大影响 在材料领域培养合格的研究人员 科学和电子。