Development of Rare Earth-free permanent magnets with different compositions
Abstract
Magnetic materials with large saturation magnetization (Ms), anisotropy constant (K), and Curie temperature (Tc), consistently attract attention due to their potentials for permanent magnet (PM) applications. Recently, these applications have been expanded into sustainable energy devices, including electric vehicle (EV) motors, magnetic refrigeration, and wind power generators. Permanent magnets continue to play an increasingly important role in the technology [1]. In recent years, there is a strong interest in rare-earth-free permanent magnets (PMs), because China controls the production of rare earth elements, and the high prices of these elements, promotes the researchers to look for new alternatives in permanent magnets. This is mainly due to the high performance PMs contain light rare earth elements, such as neodymium and/or praseodymium with a small amount of heavy rare earths of dysprosium and/or terbium [2]. Currently, there are rare earth free PMs of FePt and CoPt type, which are chemically ordered alloys and they are very expensive too; making their production difficult on a large scale [3]. As a result, there is an imperative need for the community to focus on hard magnetic materials without (or with less) rare-earth elements (Nd, Sm). For this reason, the objective of the rare-earth free PMs project is to develop a new generation of high-performance PMs without rare earths.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 10, 2019
- Source ID
- W911NF1920030
Entities
People
- German Antonio Pérez Alcázar
Organizations
- Army Contracting Command
- United States Army
- University of Valle