Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00184 : High-temperature performance of bulk nanocomposite SmCo$_{5}$/-Fe(Co) magnets
Author:
Permanent magnetic materials capable of operating at elevated
temperatures
are highly required for advanced power systems. In this work, a new
processing technique has been adopted to produce SmCo$_{5}$-based
bulk
nanocomposite magnets with high thermal stability. The processing
consists
of severe plastic deformation and warm compaction. The structure and
high-temperature magnetic property characterizations show that the
microstructure does not change with heating temperature up to 500
$^{\circ}$C
which ensures effective inter-phase exchange coupling at elevated
temperature. It was also found that the thermal stability of the
bulk
nanocomposite magnets can be significantly improved with
increasing density
(decreasing porosity). The room temperature energy product drops
fast with
heating temperature above 300 $^{\circ}$C for the magnets with
80{\%} density,
and with minimum decrease for the magnets with full density.
Energy product
about 11.1 MGOe can be obtained at 300 $^{o\circ}$C in the fully
dense isotropic
bulk SmCo$_{5}$/Fe nanocomposite magnets.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.184
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