Microstructure and Superconducting Properties of Bulk Hg-Ba-Ca-Cu-O on Metallic Surfaces

金属表面块状Hg-Ba-Ca-Cu-O的微观结构和超导性能

• 批准号: 9526231
• 负责人: Justin Schwartz
• 金额: $ 59.67万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-02-15 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526231&HistoricalAwards=false
• 关键词: Microstructure; Superconducting; Properties; Bulk; Hg

9526231 Schwartz The proposed research integrates synthesis, microstructural characterization, and superconducting properties characterization to explore the critical influence of a metallic interface on the HgBa2Can-1CunOx system, the superconducting oxide system with highest critical temperature yet achieved. The project objectives include identifying chemically compatible metallic substrates, understanding and controlling interfacial reactions, understanding the influencing factors for microstructural development of the superconducting and competing non- superconducting phases (including texture), and understanding the microstructure/superconducting properties relationships, including flux pinning and weak links. Synthesis studies will employ a two-zone assembly that allows for independent control of the mercury pressure and the annealing temperature. Tapes will be cast on metallic substrates. Thermal processing, atmosphere, stoichiometry, and substrate metal are important variables. The samples will be characterized using a variety of techniques. %%% The project addresses the underlying scientific issues for applications of the HgBa2Can-1 CunOx superconducting oxides. A deeper understanding of the relationships between metallic interfaces, microstructure, and properties of high temperature superconductors will result. ***

小行星9526231 拟议的研究集成了合成，微观结构表征和超导性能表征，探索金属界面对HgBa 2Can-1CunOx系统的关键影响，超导氧化物系统具有最高的临界温度尚未实现。 该项目的目标包括识别化学相容的金属衬底，理解和控制界面反应，理解超导和竞争非超导相（包括织构）的微结构发展的影响因素，以及理解微结构/超导性能关系，包括磁通钉扎和弱连接。 合成研究将采用两区组装，允许独立控制的汞压力和退火温度。 磁带将被铸造在金属基板上。 热处理、气氛、化学计量和基底金属是重要的变量。 将使用各种技术对样品进行表征。 该项目解决了HgBa 2Can-1 CunOx超导氧化物应用的基本科学问题。 对高温超导体的金属界面、微观结构和性质之间的关系有更深入的了解。 ***