US 11,948,733 B2
Processing of anisotropic permanent magnet without magnetic field
Wanfeng Li, Novi, MI (US); Chuanbing Rong, Canton, MI (US); Franco Leonardi, Dearborn Heights, MI (US); and Michael W. Degner, Novi, MI (US)
Assigned to FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Jan. 17, 2020, as Appl. No. 16/746,116.
Prior Publication US 2021/0225586 A1, Jul. 22, 2021
Int. Cl. H01F 41/02 (2006.01); H01F 1/055 (2006.01); H01F 1/057 (2006.01); H01F 1/059 (2006.01)
CPC H01F 41/0273 (2013.01) [H01F 1/0556 (2013.01); H01F 1/0576 (2013.01); H01F 1/059 (2013.01); H01F 41/0266 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of processing an anisotropic permanent magnet comprising:
forming anisotropic flakes from a bulk magnet alloy of Al-Ni-Co material, each of the anisotropic flakes having a selected orientation with an easy magnetization direction with respect to a surface of the flake;
combining the anisotropic flakes with a binder to form a mixture;
extruding or rolling the mixture without applying a magnetic field or any prior application of a magnetic field to align the anisotropic flakes such that the easy magnetization directions of the anisotropic flakes align via mechanical processing to form one or more layers having an overall magnetization direction aligned with the easy magnetization directions of the anisotropic flakes based on the selected orientation; and
producing the anisotropic permanent magnet from the layers having the magnetization direction such that the anisotropic permanent magnet has a magnetization with a specific orientation.