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Novel Bimorphological Anisotropic Bulk Nanocomposite Materials with High Energy Products
Author(s) -
Li Xiaohong,
Lou Li,
Song Wenpeng,
Huang Guangwei,
Hou Fuchen,
Zhang Qian,
Zhang HaiTian,
Xiao Jianwei,
Wen Bin,
Zhang Xiangyi
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201606430
Subject(s) - materials science , nanocomposite , equiaxed crystals , magnet , anisotropy , rare earth , fabrication , phase (matter) , anisotropy energy , composite material , deformation (meteorology) , nanotechnology , microstructure , magnetic anisotropy , magnetic field , metallurgy , magnetization , mechanical engineering , optics , medicine , physics , alternative medicine , chemistry , organic chemistry , pathology , quantum mechanics , engineering
Nanostructuring of magnetically hard and soft materials is fascinating for exploring next‐generation ultrastrong permanent magnets with less expensive rare‐earth elements. However, the resulting hard/soft nanocomposites often exhibit random crystallographic orientations and monomorphological equiaxed grains, leading to inferior magnetic performances compared to corresponding pure rare‐earth magnets. This study describes the first fabrication of a novel bimorphological anisotropic bulk nanocomposite using a multistep deformation approach, which consists of oriented hard‐phase SmCo rod‐shaped grains and soft‐phase Fe(Co) equiaxed grains with a high fraction (≈28 wt%) and small size (≈10 nm). The nanocomposite exhibits a record‐high energy product (28 MGOe) for this class of bulk materials with less rare‐earth elements and outperforms, for the first time, the corresponding pure rare‐earth magnet with 58% enhancement in energy product. These findings open up the door to moving from a pure permanent‐magnet system to a stronger nanocomposite system at lower costs.