Coercivity enhancement by inhibiting the formation of coarse grains region in hot-deformed Nd-Fe-B magnets with WC nano-particles addition. (15th April 2017)

• Record Type: Journal Article
• Authors: Zheng, Xiaofen; Li, Ming; Chen, Renjie; Lei, Fang; Jin, Chaoxiang; Wang, Zexuan; Ju, Jinyun; Yin, Wenzong; Lee, Don; Yan, Aru
• Is Part Of: Scripta materialia. Number 132(2017)
• Page Start: 49
• Page End: 52
• Publication Date: 2017-04-15
• Subjects: Nd-Fe-B -- Hot-deformed magnet -- Coercivity -- Coarse grains -- Local compressive stress; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.01.024
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Anisotropic ultrafine-grained Nd-Fe-B magnets with WC addition were prepared by hot deformation. With WC nano-particles addition of ~ 1.0 wt.%, the squareness was optimized and the coercivity of the hot-deformed magnets increased substantially by 2.16 kOe, from 15.59 to 17.75 kOe without expense of the remanent magnetization. The observation for microstructure revealed that the WC nano-particles mainly existed on the interfaces of melt-spun ribbons. Meanwhile, due to the local compressive stress induced by the hard WC nano-particles, the deformability of neighboring grains was remarkably enhanced which leads to the reduction of the coarse grain regions. Graphical abstract: