Phase relations in the system Sm-Fe-Ti and the consequences for the production of permanent magnets

Phase relations in the Fe-rich corner of the Sm-Fe-Ti system were investigated by means of microstructural examinations, EDX, and thermal and thermomagnetic analyses. Between 1000 degrees C and 800 degrees C, equilibria of Sm(Fe, Ti)/sub 12/ with the phases alpha -Fe, Fe/sub 2/Ti, and Sm(Fe, Ti)/sub...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1992-09, Vol.28 (5), p.2832-2834
Main Authors: Reinsch, B., Grieb, B., Henig, E.-T., Petzow, G.
Format: Article
Language:English
Subjects:
Annealing
Applied sciences
Argon
Coercive force
Condensed matter: structure, mechanical and thermal properties
Cooling
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Iron
Laboratories
Magnetization
Metals. Metallurgy
Optical microscopy
Permanent magnets
Physics
Production systems
Specific phase transitions
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Summary:Phase relations in the Fe-rich corner of the Sm-Fe-Ti system were investigated by means of microstructural examinations, EDX, and thermal and thermomagnetic analyses. Between 1000 degrees C and 800 degrees C, equilibria of Sm(Fe, Ti)/sub 12/ with the phases alpha -Fe, Fe/sub 2/Ti, and Sm(Fe, Ti)/sub 9/ were found, which are all ferromagnetic. The nonferromagnetic Sm(Fe, Ti)/sub 11/ is not in equilibrium with Sm(Fe, Ti)/sub 12/ because of the equilibrium Fe/sub 2/Ti+Sm(Fe, Ti)/sub 9/ (>or=900 degrees C) or Fe/sub 2/Ti+Sm/sub 2/(Fe, Ti)/sub 17/ (
ISSN:0018-9464
1941-0069
DOI:10.1109/20.179642