|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Science for High-Performance Permanent Magnets
||Fabrication of Nd-Fe-B Thin Films as a Model Material
||Toshiyuki Shima, Ryosuke Nakagawa, Aya Sugawara, Risa Kurosu, Masaaki Doi
|On-Site Speaker (Planned)
The demand of renewable and sustainable energy drives us to develop high efficient electromagnetic conversion system. In particular, the development of high performance motors consisting of rare-earth permanent magnets are strongly needed to fulfill the automotive applications such as hybrid vehicles (HVs), plug-in hybrid vehicles (PHVs) and electric vehicles (EVs). Recent studies revealed that the magnetic coupling between the main phases is thought to reduce by the grain boundary phase with Nd-rich and Cu-rich phases after post-sinter annealing. In addition, adding a small amount of Co to Nd-Fe-B sintered magnets has been done to improve the thermal stability of magnets due to increase of Currie temperature. In this talk, in order to understand the coercivity mechanism of Nd-Fe-B system, our recent studies on the effect of Co addition to the Nd-Fe-B thin films, microfabricated Nd-Fe-B dot arrays for the structure and magnetic properties have been introduced.