Zr-Rich Phases in Sm(CoFeCuZr)z Magnets

Marcos Flavio de Campos; S.A. Romero; A.C. Neiva; J. Trota Filho; Leandro Reis Lidizio; Hercílio R. Rechenberg; F.P. Missell

doi:10.4028/www.scientific.net/MSF.530-531.158

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HomeMaterials Science ForumMaterials Science Forum Vols. 530-531Zr-Rich Phases in Sm(CoFeCuZr)z Magnets

Zr-Rich Phases in Sm(CoFeCuZr)_z Magnets

Abstract:

Sm(CoFeCuZr)z commercial magnets are manufactured by powder metallurgy techniques. Microstructural investigations of Sm(CoFeCuZr)z magnets have shown that, increasing the Zr content, some impurity phases may appear. An alloy with composition (at%): 60.5% Co – 15.5% Fe – 11.5% Zr - 8.5% Sm - 4% Cu, homogenized at 1050oC, was investigated. Three main phases were identified: rhombohedral 1:3 (ZrSm)1(CoFeCu)3, hexagonal 1:7 (SmZr)1(CoFeCu)7 and cubic 6:23 (Zr)6(CoFe)23. Knowledge of possible phases present in 2:17-type magnets allows a better understanding of the nanocrystalline microstructure responsible for high coercivity of these magnets.

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Materials Science Forum (Volumes 530-531)

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158-163

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.158

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November 2006

Authors:

Marcos Flavio de Campos, S.A. Romero, A.C. Neiva, J. Trota Filho, Leandro Reis Lidizio, Hercílio R. Rechenberg, F.P. Missell

Keywords:

Intermetallic Phase, Phase Diagram, Sm(CoFeCuZr)_z Magnets

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