Title: Synthesis and magnetic performance of gadolinium powder produced with rotating disk atomization

Journal Article · · Powder Technology
 [1];  [2];  [3];  [4];  [1]; ORCiD logo [1]
  1. Ames Lab., Ames, IA (United States). Materials Science and Engineering Division; Iowa State Univ., Ames, IA (United States). Materials Science and Engineering Division
  2. Ames Lab., Ames, IA (United States). Materials Science and Engineering Division
  3. Emerald Energy NW, LLC, Bothell, WA (United States)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate
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Spherical powder is key for achieving good heat transfer and maintaining low pressure drop for heat transfer fluid in magnetocaloric regenerator. Obtaining relatively large spherical powder of rare earth metals that are extremely sensitive to oxygen is challenging. Comparing to gas atomization and plasma rotating electrode methods, rotating disk atomization (RDA) method is more robust for obtaining a small amount of powder with a short turn-around time, thereby, more suitable for research and development of new magnetocaloric materials. In this work, commercially bulk gadolinium was successfully atomized to produce spherical powder in the targeted 150–250 μm range. The obtained powder exhibited the expected magnetocaloric performance with a maximum change of magnetic entropy of 12.1 J/kg K and a maximum adiabatic temperature change of 12.8 K with an applied magnetic field of 7 T.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1574951
Report Number(s):
IS-J 10082
Journal Information:
Powder Technology, Journal Name: Powder Technology Journal Issue: C Vol. 359; ISSN 0032-5910
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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