CAREER: Nanostructured Intermetallic Alloys - Annealing Behavior, Microstructural Control and Influence of Scale in Reversibly Ordering Systems

职业：纳米结构金属间合金 - 可逆有序系统中的退火行为、微观结构控制和尺度影响

• 批准号: 0094213
• 负责人: Jorg Wiezorek
• 金额: --
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2007-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0094213&HistoricalAwards=false
• 关键词: CAREER; Nanostructured; Intermetallic; Alloys; Annealing

0094213WiezorekThis CAREER award is aimed at a quantitative, mechanism-based description of the processing-microstructure-property relationships and annealing behavior in reversibly ordering metallic systems. Model alloys based on the ferromagnetic L10- and L12-ordered intermetallic phases in the Fe-Pd system undergoing severe plastic deformation (SPD) processing will be the focus of the research. The main experimentation techniques are differential scanning calorimetry (DSC), vibrating-scanning-magnetometers, mechanical testing, and in-situ and post-mortem microstructural observations by transmission electron microscopy and x-ray diffraction. Strategies for property optimization and microstructural control will be devised based on the mechanistic models of the processes responsible for the observed microstructural changes. Unique exploitation of reaction processing of heavily deformed reversibly ordering alloys will be used to control microstructures at the nanoscale. The educational component centers on the development of Web-based educational tools and their implementation into upper-level MS&E undergraduate and graduate courses. These new tools will incorporate results and experimental capabilities developed from the research and they will be made available to the public cost-free. The national and international collaborations that will be fostered through this award offer unique opportunities for interaction with outstanding researchers in the field of intermetallics and physical metallurgy of advanced materials. %%%This research facilitates a systematic study of scale-related effects in truly bulk nanostructured functional intermetallic alloys with commercial potential. There is considerable interest in these functional intermetallics for advanced permanent magnet technologies, e.g. thin film media, data storage and futuristic micro-devices. Refinement of the microstructure to the nanoscale offers enormous potential for property improvements. Future success of these and many other intermetallics requires a detailed knowledge of the synergistic interplay between competing solid-state reactions during processing.***

0094213Wiezorek该CAREER奖项旨在对可逆有序金属系统中的加工-微观结构-性能关系和退火行为进行定量、基于机制的描述。基于铁磁L10和L12有序金属间相的Fe-Pd系强塑性变形模型合金将是研究的重点。主要的实验技术是差示扫描量热法（DSC），振动扫描磁力计，机械测试，并通过透射电子显微镜和X射线衍射的原位和死后显微结构观察。 将根据负责观察到的微观结构变化的过程的机械模型来设计性能优化和微观结构控制的策略。对大变形可逆有序合金反应过程的独特开发将用于在纳米尺度上控制微观结构。教育部分集中在基于网络的教育工具的开发和实施到上层MS E本科和研究生课程。& 这些新工具将纳入研究成果和实验能力，并免费向公众提供。通过该奖项促进的国家和国际合作为与先进材料的金属间化合物和物理冶金领域的杰出研究人员进行互动提供了独特的机会。这项研究有助于系统地研究真正大块纳米结构功能金属间化合物合金的规模相关的影响，具有商业潜力。这些功能性金属间化合物在先进的永磁技术中具有相当大的兴趣，例如薄膜介质，数据存储和未来的微型设备。将微观结构细化到纳米级为性能改进提供了巨大的潜力。这些和许多其他金属间化合物的未来成功需要详细了解加工过程中竞争固态反应之间的协同相互作用。