Role of V on the coercivity of SmFe12-based melt-spun ribbons revealed by machine learning and microstructure characterizations. (15th July 2021)

• Record Type: Journal Article
• Authors: Tang, Xin; Li, J.; Srinithi, A.K.; Sepehri-Amin, H.; Ohkubo, T.; Hono, K.
• Is Part Of: Scripta materialia. Number 200(2021)
• Publication Date: 2021-07-15
• Subjects: Permanent magnet -- ThMn12 -- SmFe12 -- Coercivity -- Microstructure -- Machine learning; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.113925
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We employed machine-learning of a dataset extracted from literature on Sm(Fe, X)12 -based alloys to understand the most influential parameters for coercivity. V-addition is found to be most influential to coercivity. The microstructure origin for coercivity in Sm x Fe11 Ti and Sm x Fe10 TiV (1.0≤ x ≤ 2.1) melt-spun ribbons was investigated experimentally. Unlike V-free alloys, ThMn12 -type structure can be stabilized in a wide range of x =1.03-1.62 in Sm x Fe10 TiV ribbons. Coercivity increases from 0.51 T for Sm0.99 Fe11 Ti to 1.1 T for Sm1.06 Fe10 TiV optimally-annealed ribbons. The enhanced coercivity originates from formation of a Sm-enriched intergranular phase enveloping the SmFe12 -based grains, increasing pinning force against the magnetic domain-wall propagation. Graphical abstract: Image, graphical abstract