High throughput screening for novel low cost Fe-based permanent magnets

该项目旨在识别，表征和开发用于高温应用的低成本铁基永磁体。汽车工业，主要是电动机和发电工业需要这种磁体。这项研究还将使航空、电机生产、电子设备和风能等广泛的行业受益。永磁体也是国防活动中使用的部件所必需的。在一定程度上满足当前技术要求的磁体含有大量昂贵的稀土元素。更重要的是，目前这些稀土金属几乎完全依赖国外供应。在该项目中，这些金属的使用将最小化，昂贵的稀土（Nd，Dy和Sm）将被更丰富和更便宜的元素（如Ce）取代。 对新磁性材料的研究将基于多组分金属体系的高通量筛选。该方法是申请人团队的独特专长，已用于发现具有特定物理或机械性能的新金属间相。该方法是基于热力学计算和扩散偶实验相结合。初步的热力学计算可以缩小感兴趣的区域，从而显着减少实验的数量。实验部分是基于多元扩散偶和扩散倍数结合关键合金的制备和分析。将使用磁力显微镜鉴定磁性化合物。 该方法的可行性已被我们的研究小组在一个典型的磁性材料系统（Fe-Nd-B）上证明，并证明可以有效和及时地提供必要的信息。在本项目中，这些步骤将用于广泛的系统。

This project aims at identifying, characterizing and developing low-cost Fe-based permanent magnets for high temperature applications. Such magnets are needed for the automotive industry, mainly for the electric motors, and for the power generation industry. This research will also benefit a wide range of industries such as aeronautical, motor production, electronic equipment and wind energy. Permanent magnets are also necessary for components used in national defense activities. The magnets that satisfy to some extent the current technological demands contain significant amounts of expensive rare earth elements. More importantly, currently there is almost complete dependence on foreign sources to supply these rare earth metals. In this project, the use of these metals will be minimized and the expensive rare earths (Nd, Dy and Sm) will be replaced with a more abundant and less expensive element such as Ce. The search for new magnetic materials will be based on the high-throughput screening of multicomponent metallic systems. This method is a unique expertise of the applicant's group that has been used to discover new intermetallic phases with specific physical or mechanical properties. The method is based on combination of thermodynamic calculations and diffusion couples experiments. The preliminary thermodynamic calculations allow narrowing the area of interest that significantly reduces the number of experiments. The experimental part is based on the preparation and analysis of multicomponent diffusion couples and diffusion multiples combined with key alloys. Magnetic compounds will be identified using Magnetic Force Microscopy. The feasibility of this methodology has been demonstrated by our research group on a typical magnetic material system (Fe-Nd-B) and proved to provide the necessary information in an efficient and timely manner. In this project, these steps will be followed for a wide range of systems.