Formation of Crystallographic Texture by Hot-Pressing of Rare-Earth Permanent Magnet Compounds

稀土永磁化合物热压晶体织构的形成

• 批准号: 8712042
• 负责人: Charles Graham
• 金额: --
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8712042&HistoricalAwards=false
• 关键词: Formation; Crystallographic; Texture; Hot; Pressing

The objective of this research is to investigate the mechanisms responsible for the development of crystallographic texture in iron neodymium boron compounds when they are processed by low temperature hot pressing. The texture will be determined experimentally using x-ray diffraction techniques. The mechanism of crystallographic orientation will be studied by optical microscopy, scanning electron microscopy, and transmission electron microscopy. The pertinent magnetic properties (e.g. magnetization, remanence, coercive field) will be measured. The research is important to improvement of understanding of the thermal processing of technologically important high energy permanent magnets. The United States has been a world leader in research on permanent magnets, but the Japanese were the world leaders in manufacturing of these materials. The U.S. magnet manufacturers are becoming more competitive, and research such as this is needed to continue our competitive growth. The training of students in the area of magnetic materials is also a very important aspect of this research, as only a few universities in the U.S. are actively training students in this topic.

本研究的目的是研究铁钕硼化合物在低温热压加工时晶体织构发展的机制。 纹理将使用 X 射线衍射技术通过实验确定。 将通过光学显微镜、扫描电子显微镜和透射电子显微镜研究晶体取向的机制。 将测量相关的磁特性（例如磁化强度、剩磁、矫顽场）。 该研究对于提高对技术上重要的高能永磁体的热处理的理解具有重要意义。 美国在永磁体研究方面一直处于世界领先地位，但日本在这些材料的制造方面处于世界领先地位。 美国磁铁制造商的竞争力正变得越来越强，需要进行此类研究以继续我们的竞争力增长。 磁性材料领域的学生培训也是这项研究的一个非常重要的方面，因为美国只有少数大学在积极培训该领域的学生。