|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Magnetic Materials for Energy and Power Conversion Applications
||Nd-Fe-B Permanent Magnets with Ultimate Hard Magnetic Properties
||Kazuhiro Hono, Taisuke T. Sasaki, Hossein Sepehri-Amin, Tadakatsu Ohkubo
|On-Site Speaker (Planned)
Due to the recent concern about the stable supply of heavy rare earth elements, attaining high coercivity in Nd-Fe-B magnets without using heavy rare earth (HRE) elements has received intense research interest in the past decade. Now that the supply of rare earth elements has been stabilized, the renewed goal is how to achieve the highest permanent magnetic properties with a balanced use of critical elements. In this talk, we will update our progresses on the development of high-coercivity and high-remanence Nd-Fe-B permanent magnets that were carried out at NIMS in collaboration with -industrial partners. We discuss how to achieve ultimate permanent magnet properties with trace additions of HRE. To obtain better understandings of the microstructure-coercivity relationships, we investigated the microstructures of experimental Nd-Fe-B sintered magnets, those processed from HDDR power, and hot-deformed magnets with different values of coercivity depending on chemical compositions, processing routes and post-manufacturing heat treatments.
||Planned: Supplemental Proceedings volume