Febnbp Nanocrystalline Alloy Powder With High Amorphous Forming Ability And High B-S For Magnetic Core

The influence of P content on amorphous forming ability and the magnetic characteristics were investigated in the FeBNbP nanocrystalline alloys using metallic ribbons. The Fe84-xB9Nb7Px(x=0-3) and Fe80B10Nb7P3 nanocrystalline alloy metallic ribbons prepared by a single-roller melt-spinning method. The Fe84-xB9Nb7Px (x=0-3) and Fe80B10Nb7P3 nanocrystalline alloys annealed at 873-923 K consist of stable alpha-Fe grain formed in a residual amorphous phase, and the nanocrystal alpha-Fe grain showed the average diameter from 6.3 to 7.7 nm. The critical thickness of ribbons indicating amorphous forming ability was increased from 20 mu m to 68.7 mu m with Fe81B9Nb7P3 by increasing P content. The Fe81B9Nb7P3 alloy also exhibited a high saturation magnetic flux density, Bs, of 1.51 T. In addition, Fe81B9Nb7P3 alloy indicated a good magnetic softness with a low coercivity, H-c, of 4.8 A/m. The Fe80B10Nb7P3 alloy increasing B content succeeded to obtain the powder with precursor of a stable amorphous phase by rapid quenching gas atomization method. (c) 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).