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US 10,109,418 B2Granted
System and process for friction consolidation fabrication of permanent magnets and other extrusion and non-extrusion structures
AssigneeBattelle Memorial Institute
InventorsJun Cui, Glenn J. Grant, Saumyadeep Jana, Yuri Hovanski, Curt A. Lavender
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Abstract
A die tool and process are described that provide friction consolidation fabrication and friction consolidation extrusion fabrication products including permanent magnets, and other extrusion and non-extrusion structures. The present invention overcomes previous particle size, texture, homogeneity and density limitations in conventional metallurgy processes.
Claims3
A permanent magnet forming process, the process comprising the steps of:
- compressing a hard magnetic material and a soft magnetic material together within a magnetic field while rotating both in at a rotation speed and temperature sufficient to homogenously mix and frictionally consolidate the hard and soft materials while exchange coupling the hard and soft magnetic materials together within the magnetic field;
- and
- cooling the consolidated magnetic material in a magnetic field to align grains of the exchange coupled materials along a selected axis therein.
Dependencies are inferred from the claim text.