Hostname: page-component-77c89778f8-gvh9x Total loading time: 0 Render date: 2024-07-16T20:37:13.286Z Has data issue: false hasContentIssue false
  • English
  • Français

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, psmith@tcd.ie
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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Wecker, J., Katter, M. and Schultz, L., J. Appl. Phys., 69 (1991) 6058 Google Scholar
2. Ding, J., McCormick, P.G. and Street, R., J. Alloys Comp., 191 (1993) 197 Google Scholar
3. Schultz, L. and Wecker, J., Mater. Sci. Eng., 99 (1988) 127 Google Scholar
4. Schnitzke, K., Schultz, L., Wecker, J. and Katter, M., Appl. Phys. Lett., 60 (1990) 2853 Google Scholar
5. Ding, J., Street, R. and McCormick, P.G., J. Magn. Magn. Mater., 115 (1992) 211 Google Scholar
6. Smith, P.A.I., Ph.D. Thesis, Department of Mechanical and Materials Engineering, The University of Western Australia, 1997 Google Scholar
7. Murillo, N., Gonz,'lez, J., Cebollada, F., Martín, V.E., González, J. M. and Schultz, L., IEEE Trans. Magn., 20 (1993) 2857 Google Scholar
8. Schultz, L., Phil. Mag. B, 61 (1990) 453 Google Scholar
9. Ding, J., McCormick, P.G. and Street, R., J. Magn., Magn. Mater., 135 (1994) 200 Google Scholar
10. Smith, P.A.I., McCormick, P.G. and Street, R., Mater. Sci. Forum, 179–181 (1995) 527 Google Scholar
11. Smith, P.A.I., Street, R. and McCormick, P.G., in Proceedings of the 13th International Workshop on Rare-Earth Magnets and Their Applications, ed. Manwaring, C.A.F., Jones, D.G.R., Williams, A.J. and Harris, I.R. (University of Birmingham, UK, 1994), p 425–432 Google Scholar
12. Buschow, K.H.J., J. Less-Common Met., 25 (1971) 131 Google Scholar
13. Smith, P.A.I., Ding, J., McCormick, P.G. and Street, R., in preparationGoogle Scholar
14. This estimate of reaction temperature is based on a commonly accepted range for the temperature rise during MA collisions of 100–200 K; see Koch, C.C., Intern. J.Mechanochemistry and Mech. Alloying, 1 (1994) 56 Google Scholar
15. Weeber, A.W. and Bakker, H., Physica B, 153 (1988) 93 Google Scholar
16. Niessen, A.K., de Boer, F.R., Boom, R., de Châtel, P.F., Mattens, W.C.M. and Miedema, A.R., CALPHAD, 7 (1983) 51 Google Scholar
17. Fernández-Guillermet, A., High Temp. - High Press., 19 (1987) 477 Google Scholar
18. Hellstern, E. and Schultz, L., Phil. Mag. B, 56 (1987) 443 Google Scholar
19. Yavari, A.R. and Desré, P., Mater. Sci. Forum., 88–90 (1992) 43 Google Scholar
20. Ma, E. and Atzmon, M., Mater. Chem. Phys., 39 (1995) 249 Google Scholar
21. Yavari, A.R., Desré, P.J. and Benameur, T., Phys. Rev. Lett., 68 (1992) 2235 Google Scholar
22. Maurice, D. and Ding, J., unpublished research, The University of Western Australia, 1997 Google Scholar