title: Novel Bimorphological Anisotropic Bulk Nanocomposite Materials with High Energy Products.
abstract: 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.
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Li
authors.initials: L
authors.lastname: Lou
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Wenpeng
authors.initials: W
authors.lastname: Song
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Guangwei
authors.initials: G
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Fuchen
authors.initials: F
authors.lastname: Hou
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.
authors.forename: Hai-Tian
authors.initials: HT
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Wen
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
authors.forename: Xiangyi
authors.initials: X
authors.lastname: Zhang
keywords: magnetic materials; nanocomposite materials; nanocomposites; nanostructures; oriented nanocrystals