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Title: High-Energy Permanent Magnets for Hybrid Vehicles and Alternative Energy Uses

The report summarizes research undertaken by a multidisciplinary team aimed at the development of the next generation high-energy permanent magnets. The principal approach was relied on bottom-up fabrication of anisotropic nanocomposite magnets. Our efforts resulted in further development of the theoretical concept and fabrication principles for the nanocomposites and in synthesis of a range of rare-earth-based hard magnetic nanoparticles. Even though we did not make a breakthrough in the assembly of these hard magnetic particles with separately prepared Fe(Co) nanoparticles and did not obtain a compact nanocomposite magnet, our performed research will help to direct the future efforts, in particular, towards nano-assembly via coating, when the two phases which made the nanocomposite are first organized in core-shell-structured particles. Two other approaches were to synthesize (discover) new materials for the traditional singe-material magnets and the nanocomposite magnets. Integrated theoretical and experimental efforts lead to a significant advance in nanocluster synthesis technique and yielded novel rare-earth-free nanostructured and nanocomposite materials. Examination of fifteen R-Fe-X alloy systems (R = rare earth), which have not been explored earlier due to various synthesis difficulties reveal several new ferromagnetic compounds. The research has made major progress in bottom-up manufacturing of rare-earth-containing nanocomposite magnets with superior energymore » density and open new directions in development of higher-energy-density magnets that do not contain rare earths. The advance in the scientific knowledge and technology made in the course of the project has been reported in 50 peer-reviewed journal articles and numerous presentations at scientific meetings.« less
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. University of Delaware
  2. Ames Laboratory
  3. University of Nebraska, Lincoln
  4. Northeastern University
  5. Virginia Commonwealth University
  6. Electron Energy Corporation
Publication Date:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
University of Delaware, Newark, DE
Sponsoring Org:
USDOE; USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Contributing Orgs:
University of Delaware, Newark, DE; Ames Laboratory, Ames IA; University of Nebraska, Lincoln, NE; Northeastern University, Boston, MA; Virginia Commonwealth University, Richmond, VA; Electron Energy Corporation, Landisville, PA
Country of Publication:
United States
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Permanent magnets; Nanocomposite magnets; Magnetic nanoparticles; Polyol synthesis; High-energy ball-milling; Mechanochemical synthesis; Surface functionalization; Micromagnetic simulation; Monte-Carlo simulation; Ternary phase equilibria