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Microstructure analysis of a Ga-doped Nd-Fe-B magnet with 2T coercivity

日本金属学会2017年秋期講演大会

XU Xiandong(NIMS), SASAKI Taisuke(NIMS), KIM Tae-Hoon(NIMS), OHKUBO Tadakatsu(NIMS), HONO Kazuhiro(NIMS)

Abstract

【Introduction】Recently, we reported that the trace addition of Ga (0.5 at.%) substantially enhanced the coercivity due to the magnetic decoupling between the neighboring Nd2Fe14B grains by the formation of non-ferromanetic grain boundary (GB) phase [1]. However, there is a demand to optimize the Ga content since the excessive Ga addition results in the formation of Nd6Fe13Ga phase that leads to the decrease in the remanent magnetization. In this presentation, we present a microstructure and magnetic property of a high coercivity Nd-Fe-B sintered magnet with less addition of Ga.
【Experiments】The chemical composition of the sample used in this work is Nd11.52Pr3.20Fe77.12 Co0.96B5.55Cu0.21Al1.30Ga0.14. Microstructure observation was performed using a field emission SEM, Carl Zeiss Cross


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元素戦略拠点

触媒・電池元素戦略拠点
触媒・電池元素戦略研究拠点 (京都大学)
東工大元素戦略拠点
東工大元素戦略拠点 (東京工業大学)
構造材料元素戦略研究拠点
構造材料元素戦略研究拠点 (京都大学)
高効率モーター用磁性材料技術研究組合
高効率モーター用 磁性材料技術研究組合