Dramatic grain refinement and magnetic softening induced by Ni addition in FeB based nanocrystalline soft magnetic alloys. (May 2020)

• Record Type: Journal Article
• Authors: Li, Z.; Parsons, R.; Zang, B.; Kishimoto, H.; Shoji, T.; Kato, A.; Karel, J.; Suzuki, K.
• Is Part Of: Scripta materialia. Number 181(2020)
• Page Start: 82
• Page End: 85
• Publication Date: 2020-05
• Subjects: Rapid solidification -- Amorphous alloys -- Rapid annealing -- Grain size -- Coercivity; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.02.020
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The effects of Ni addition on the grain size ( D ) and coercivity ( H c ) were investigated for nanocrystalline (Fe1- x Ni x )86 B14 ( x = 0–0.3) alloys prepared by ultra-rapid annealing of melt-spun amorphous precursors. Ni addition resulted in a structural change of the nanocrystallites from bcc to fcc and an exceptionally small D of 4.2 nm was obtained at x = 0.3. H c was reduced dramatically from 6.8 A/m at x = 0 to as small as 2.6 A/m at x = 0.1. This significant improvement of magnetic softness is well understood by the effect of Ni on the local magnetocrystalline anisotropy. Graphical abstract: Image, graphical abstract