Weak Links, Grain Boundaries and Surfaces of High-Temperature Superconductors

高温超导体的薄弱环节、晶界和表面

• 批准号: 8911332
• 负责人: David Larbalestier
• 金额: $ 158.68万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1993-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911332&HistoricalAwards=false
• 关键词: Weak; Links; Grain; Boundaries; Surfaces

This research focuses on one of the most critical and difficult issues in the field of high temperature superconductors; the role of grain boundaries as current limiting structures in bulk and thin film materials. This research will provide a detailed study of weak links, grain boundary structure and composition as well as surface properties of high temperature superconductors. The weak link investigations focus on single grain boundaries in polycrystalline bulk materials, and will employ thinned samples for which the critical current can be probed locally and the grain boundaries to their structure and composition. Complementary surface characterization work using synchrotron radiation techniques will also be carried out. This research is potentially of great strategic importance and could provide enabling technology for commercial applications of bulk high temperature superconducting materials.

该研究重点关注高温超导领域最关键、最难的问题之一；晶界作为块体和薄膜材料中的限流结构的作用。 这项研究将对高温超导体的薄弱环节、晶界结构和成分以及表面特性进行详细研究。 薄弱环节研究的重点是多晶块体材料中的单晶界，并将采用减薄的样品，可以局部探测临界电流以及晶界的结构和成分。 还将利用同步加速器辐射技术进行补充表面表征工作。 这项研究具有潜在的重大战略意义，可以为块状高温超导材料的商业应用提供支持技术。