High temperature magnetic properties of SmCo{sub 5}/{alpha}-Fe(Co) bulk nanocomposite magnets

Journal Article · Mon Oct 08 00:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4758480· OSTI ID:22080482

Chuanbing, Rong; Poudyal, Narayan; Liu, X B; Ping Liu, J ^[1]; Ying, Zhang ^[1]; Kramer, M J ^[2]

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1. Department of Physics, University of Texas at Arlington, Arlington, Texas 76019 (United States)
2. Division of Materials Science and Engineering, Ames Laboratory, USDOE, Iowa State University, Ames, Iowa 50011 (United States)

To find alternative high temperature magnets containing no heavy rare earths for power applications, SmCo{sub 5}/Fe bulk nanocomposite magnets with enhanced energy density and high thermal stability have been produced by using a ball-milling plus warm-compaction route. Up to 30% of the Fe soft magnetic phase has been added to the composites with grain size <20 nm distributed homogenously in the matrix of the SmCo{sub 5} hard magnetic phase. It was observed that the microstructure does not change with temperature up to 500 Degree-Sign C. It is also observed that the thermal stability of bulk nanocomposite samples is closely related to bulk density. Energy products above 11 MGOe have been obtained at 300 Degree-Sign C in fully dense bulk SmCo{sub 5}/Fe nanocomposite magnets, which is 65% higher than that of a single-phase counterpart at the same temperature.

• OSTI ID: 22080482
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 15 Vol. 101; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BULK DENSITY
COBALT ALLOYS
COMPOSITE MATERIALS
ENERGY DENSITY
GRAIN SIZE
IRON ALLOYS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
NANOSTRUCTURES
PERMANENT MAGNETS
RARE EARTHS
SAMARIUM ALLOYS
STABILITY
TEMPERATURE RANGE 0400-1000 K