Internally Oxidized Dispersion Strengthened Ag for High-Temperature Superconductor Composite Wires

高温超导复合线材用内氧化弥散强化银

• 批准号: 9360646
• 负责人: Gilbert Riley
• 金额: $ 6.5万
• 依托单位: AMERICAN SUPERCONDUCTOR CORPORATION
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-01 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9360646&HistoricalAwards=false
• 关键词: Internally; Oxidized; Dispersion; Strengthened; Ag

9360646 Riley The strengthening of High-Temperature Superconductor (HTS) composite wires using internally oxidized, dispersion strengthened (ODS) silver is proposed. Current methods manufacture of state-of-the-art HTS composite wires, that consist of ceramic superconductor filaments encased in a silver (Ag) sheath, weaken the Ag sheath, resulting in reduced HTS composite strengths. The low strength of the composite wires are a major obstacle in the development of HTS wires for applications requiring robust conductors such as power transmission cables, magnets, and motors. The one method of increasing the strength of the sheath, while maintaining the chemical compatibility and oxygen permeability of Ag is ODS. Because the required strengths cannot be obtained using commercially available ODS-Ag materials and processes, the proposed Phase I research will be directed towards evaluating novel ODS-Ag materials using novel processing techniques in the context of HTS composite processing. Process-property-microstucture relationships for the ODS-Ag materials will thusly be obtained. Moreover, by using statistically designed experimental techniques, a quantitative expression of the mechanical properties of the novel ODS-Ag materials as a function of the process parameters (temperature, oxygen activity, time and strain) relevant to HTS composite wire fabrication will result. This evaluation scheme will enable the identification of the optimum ODS-Ag material (composition and process) for integration with HTS in composite form. ***

小行星9360646 提出了用内氧化弥散强化（ODS）银强化高温超导（HTS）复合线材的方法。 由包裹在银（Ag）护套中的陶瓷超导体细丝组成的现有技术HTS复合线材的当前制造方法削弱了Ag护套，导致HTS复合材料强度降低。 复合线材的低强度是开发用于需要坚固导体的应用（诸如电力传输电缆、磁体和马达）的HTS线材的主要障碍。 ODS是一种既能提高护套强度，又能保持Ag的化学相容性和透氧性的方法。 由于使用市售ODS-Ag材料和工艺无法获得所需强度，因此拟议的第一阶段研究将针对在高温超导复合材料加工过程中使用新加工技术评估新ODS-Ag材料。 从而获得了ODS-Ag材料的工艺-性能-微观结构关系。 此外，通过使用统计学设计的实验技术，作为高温超导复合导线制造相关的工艺参数（温度，氧活度，时间和应变）的函数的新型ODS-Ag材料的机械性能的定量表达将导致。 这一评价计划将能够确定最佳的耗氧物质银材料（成分和工艺），以便以复合材料的形式与高温超导体相结合。 ***