Bulletin of the American Physical Society
APS March Meeting 2012
Volume 57, Number 1
Monday–Friday, February 27–March 2 2012; Boston, Massachusetts
Session T10: Invited Session: Earth-Abundant Materials for Critical Technologies
2:30 PM–5:30 PM,
Wednesday, February 29, 2012
Sponsoring Unit: DMP
Chair: Phillip Duxbury, Michigan State University
Abstract ID: BAPS.2012.MAR.T10.2
Abstract: T10.00002 : Replacing critical rare earth materials in high energy density magnets*
3:06 PM–3:42 PM
Preview Abstract Abstract
R. William McCallum
(Ames Laboratory USDOE / Iowa State University)
High energy density permanent magnets are crucial to the design of internal permanent magnet motors (IPM) for hybride and electric vehicles and direct drive wind generators. Current motor designs use rare earth permanent magnets which easily meet the performance goals, however, the rising concerns over cost and foreign control of the current supply of rare earth resources has motivated a search for non-rare earth based permanent magnets alloys with performance metrics which allow the design of permanent magnet motors and generators without rare earth magnets. This talk will discuss the state of non-rare-earth permanent magnets and efforts to both improve the current materials and find new materials. These efforts combine first principles calculations and meso-scale magnetic modeling with advance characterization and synthesis techniques in order to advance the state of the art in non rare earth permanent magnets. The use of genetic algorithms in first principle structural calculations, combinatorial synthesis in the experimental search for materials, atom probe microscopy to characterize grain boundaries on the atomic level, and other state of the art techniques will be discussed. In addition the possibility of replacing critical rare earth elements with the most abundant rare earth Ce will be discussed.
*Work at The Ames Laboratory was supported by the U.S. DOE under Contract No. DE-AC02-07CH11358.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.T10.2
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