The Relationship Between Structure and Properties in Manganese-Aluminum-Base Permanent Magnet Materials

锰铝基永磁材料结构与性能的关系

• 批准号: 9414302
• 负责人: William Soffa
• 金额: $ 38.38万
• 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: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9414302&HistoricalAwards=false
• 关键词: Relationship; Between; Structure; Properties; Manganese

9414302 Soffa An aim of this research program is to clarify the effects of processing variables that control microstructure and defect structure in manganese/aluminum (MnAl) permanent magnet materials. A further aim is to understand the mechanisms of magnetization and magnetization reversal, which account for the hysteresis behavior and magnetic properties of these ferromagnets. A comprehensive electron transmission microscopy study is planned to examine the complex diffusional/displacive transformation occurring in this material. Deformation under compression loading is examined under a broad temperature range to determine ways of creating desired textures. Magnetic hysteresis is measured for different structural states to determine magnetic properties. This information should provide a sound basis for designing thermomechanical processing schemes for optimum manufacturing of MnAl-base permanent magnets. %%% For more than two decades permanent magnet materials based on the manganese/aluminum system have loomed on the horizon as important magnetic materials for a wide variety of applications not requiring the extraordinary properties of the more expensive rare earth permanent magnets. Application has been limited by the economics related to processing. Research results of this investigation should lead to more innovative and efficient processing strategies for manufacturing permanent magnets that are based on the MnAl (L1) intermetallic phase. ***

9414302 Soffa 本研究计划的目的是澄清锰/铝（MnAl）永磁材料中控制微观结构和缺陷结构的工艺变量的影响。 另一个目的是了解磁化和磁化反转的机制，这些机制解释了这些铁磁体的磁滞行为和磁性。 一个全面的电子透射显微镜研究计划检查复杂的扩散/displacive转变发生在这种材料。 在宽的温度范围内检查压缩载荷下的变形，以确定创建所需纹理的方式。 测量不同结构状态的磁滞以确定磁性。 这些信息应提供一个合理的基础上，设计热机械加工方案，以优化制造的锰铝基永磁体。 %%% 二十多年来，基于锰/铝系统的永磁材料作为重要的磁性材料出现在地平线上，用于各种各样的应用，而不需要更昂贵的稀土永磁体的非凡性能。 应用受到与加工有关的经济因素的限制。 这项调查的研究结果应导致更创新和更有效的加工策略，用于制造基于MnAl（L1）金属间相的永磁体。 ***