Control of oriented textures for anisotropic Nd-Fe-B hard magnetic materials based on real-dimensional ultra-microscopy analysis

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360291
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Kyushu University
• Principal Investigator: ITAKURA Masaru 九州大学, 総合理工学研究科(研究院), 准教授 (20203078)
• Co-Investigator(Kenkyū-buntansha): NISHIDA Minoru 九州大学, 大学院総合理工学研究院, 教授 (90183540) ; MITSUHARA Masatoshi 九州大学, 大学院総合理工学研究院, 助教 (10514218) ; NAKANO Masaki 長崎大学, 工学部, 准教授 (20274623)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ネオジム磁石 / 熱間加工磁石 / HDDR磁石 / 薄膜磁石 / 電子顕微鏡 / 結晶方位解析 / プリセッション電子回折

Outline of Final Research Achievements

Three kinds of anisotropic Nd-Fe-B magnetic materials were investigated by the real-dimensional ultra-microscopy analysis in order to realize the optimum microcrystalline textures with higher remanences and coercivities, and the following three researches were carried out: 1. Control of the microstructural factors affecting on the oriented microcrystalline texture in the HDDR-processed Nd-Fe-B magnets, 2. Control of the microstructural factors affecting on the oriented microcrystalline texture in the hot-deformed Nd-Fe-B magnet, 3. Analysis of a nanocomposite texture in the PLD-made Nd-Fe-B thick film magnet. One of notable results is to realize the crystallographic orientation analysis of sub-micron sized Nd2Fe14B crystal grains by the precession electron diffraction technique in TEM, and to clarify some microstructural factors controlling the degrees of c-axis orientation, or the remanences.

Free Research Field

工学