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Metastable Phase Formation in Mechanically Alloyed Sm-Co-Fe

Published online by Cambridge University Press:  10 February 2011

P. A. I. Smith ,
J. Ding ,
P. G. McCormick  and
R. Street
P. A. I. Smith
Affiliation:
now at Department of Physics, Trinity College, Dublin, Ireland, [email protected]
J. Ding
Affiliation:
now at Department of Materials Science, National University of Singapore
P. G. McCormick
Affiliation:
Special Research Centre for Advanced Mineral and Materials Processing, The University of Western Australia, Nedlands, WA 6907, AUSTRALIA
R. Street
Affiliation:
Special Research Centre for Advanced Mineral and Materials Processing, The University of Western Australia, Nedlands, WA 6907, AUSTRALIA
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Abstract

A detailed phase analysis of mechanically alloyed (Sm0.18Co0.82)100-xFex powders has been performed using X-ray diffraction and Mössbauer spectroscopy. A two-phase structure develops as the Fe content is increased, with an increasing proportion of bcc Fe-Co in addition to amorphous Sm-Co-Fe. Both phases become richer in Fe, but Fe is concentrated in the bcc phase, due to a limited ability of Fe to substitute in amorphous Sm-Co. Changes in phase formation with increasing Fe content can be correlated with changes in the calculated free energy of mixing of amorphous Sm-Co-Fe.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 481: Symposium P – Science and Technology of Semiconductor Surface Preparation , 1997 , 655
Copyright
Copyright © Materials Research Society 1998

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References

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