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Title: Mechanical and electrical properties of low temperature phase MnBi

The low temperature phase (LTP) MnBi is a promising rare-earth-free permanent magnet material due to its high intrinsic coercivity and its large positive temperature coefficient. While scientists are making progress on fabricating bulk MnBi magnets, engineers have started to consider MnBi magnet for motor applications. In addition to the magnetic properties, there are other physical properties that could significantly affect a motor design. Here, we report the results of our investigation on the mechanical and electrical properties of bulk LTP MnBi and their dependence on temperature. We found at room temperature the sintered MnBi magnet fractures when the compression stress exceeds 193 MPa; and its room temperature electric resistance is about 6.85 μΩ-m.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ; ORCiD logo [1] ;  [1] ;  [1] ;  [3] ;  [4]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Ames Lab., Ames, IA (United States)
  3. Electron Energy Corp., Landisville, PA (United States)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Report Number(s):
PNNL-SA-111396
Journal ID: ISSN 0021-8979; CJ0100000
Grant/Contract Number:
AC05-76RL01830; 11/CJ000/09/03
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 119; Journal Issue: 3; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
OSTI Identifier:
1243183
Alternate Identifier(s):
OSTI ID: 1421058