US 12,237,105 B2
Additive manufacturing of permanent magnets with post processing
Wanfeng Li, Novi, 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 Dec. 10, 2021, as Appl. No. 17/547,809.
Prior Publication US 2023/0187130 A1, Jun. 15, 2023
Int. Cl. H01F 41/02 (2006.01); B29C 64/153 (2017.01); B29C 64/393 (2017.01); B33Y 50/02 (2015.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01); H01F 1/053 (2006.01); H01F 1/10 (2006.01)
CPC H01F 41/0246 (2013.01) [B29C 64/153 (2017.08); B29C 64/393 (2017.08); B33Y 50/02 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); H01F 1/053 (2013.01); H01F 1/10 (2013.01); H01F 41/0266 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of making a permanent magnet comprising:
additively manufacturing a framework of a first composition layer by layer, the framework having a pathway system of predetermined shape and defining one or more pores;
disposing an infiltrate, including MnBi, Al—Si(Ge), or Al—Si(Ge)—Fe(Co,Cr), within the pathway system;
sintering or melting the infiltrate; and
solidifying the infiltrate such that it is disposed within the pathway system, and that the framework and infiltrate form a body having discrete phases.