Structure and magnetism of multiphase Sm{sub 0.080}Co{sub 0.645}Fe{sub 0.276} powders

Journal Article · Mon Mar 31 23:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365142· OSTI ID:496558

Harris, V G; Liou, M; Das, B N; Browning, V M; Snyder, J E; Rubinstein, M; Lawrence, S H ^[1]; Littleton, R; Pappas, D P ^[2]

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1. U.S. Naval Research Laboratory, Washington, DC 20375-5000 (United States)
2. Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)

A Sm-poor mixture of Fe-substituted Sm{sub 2}Co{sub 17}, having the nominal stoichiometry of Sm{sub 0.080}Co{sub 0.645}Fe{sub 0.276}, was ball-milled to explore the possibility of enhancing its remanence through direct microstructural refinement. With milling, the Sm{sub 2}(Co{sub 0.7}Fe{sub 0.3}){sub 17} compound disassociates to a body-centered-cubic supersaturated SmCoFe solid solution and a residual SmCoFe amorphous phase. Correspondingly, the coercive field values first increase, peaking at 0.83 kOe after 180 min of milling, then decrease with continued milling to {lt}0.1 kOe after 1200 min. The remanence, as M{sub r}/M{sub s}, is measured to track closely the coercive field behavior, experiencing modest increases to 0.26 after just 120 min of milling. Magnetization values are found to increase first with the dissociation of the 2:17 phase, and again with the ejection of Sm from the bcc component. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 496558
• Report Number(s): CONF-961141--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT ALLOYS
COERCIVE FORCE
CRYSTAL STRUCTURE
DISSOCIATION
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
POWDER METALLURGY
POWDERS
SAMARIUM ALLOYS
SOLID SOLUTIONS
STOICHIOMETRY