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Modelling the Heat Treatment of Sintered SmCo5 Magnets

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Abstract:

The processing of SmCo5 sintered magnets involves a post-sintering heat treatment, where the intrinsic coercivity of the magnets may increase more than one order of magnitude. Variables of the heat treatment like time, temperature and cooling rate have strong influence on coercivity. We describe a method for modeling the heat treatment, which includes microstructural features as precipitate size and 2nd phase volume fraction. The numerical solution was obtained using the Finite Volume Method to solve Fick´s second law. Experimental data like the diffusion coefficient of Sm into SmCo5 phase and the Sm-Co phase Diagram are used for the modeling.

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Periodical:

Materials Science Forum (Volumes 530-531)

Pages:

152-157

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.152

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Online since:

November 2006

Authors:

Marcos Flavio de Campos, José Adilson de Castro, Paulo Rangel Rios

Keywords:

Finite Volume Method (FVM), Heat Treatment, SmCo5 Magnets

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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