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An Analytical Electron Microscopy Characterization of Melt-Spun Iron/Rare-Earth/Boron Magnetic Materials

Published online by Cambridge University Press:  25 February 2011

R.C. Dickenson ,
K.R. Lawless  and
G.C. Hadjiipanayis
R.C. Dickenson
Affiliation:
Dept. of Materials Science, Univ. of Virginia, Charlottesville VA 22901
K.R. Lawless
Affiliation:
Dept. of Materials Science, Univ. of Virginia, Charlottesville VA 22901
G.C. Hadjiipanayis
Affiliation:
Dept. of Physics, Kansas St. Univ., Manhattan KN 66506
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Iron/rare-earth/boron permanent magnet materials have recently been delveloped to reduce the need for the strategic element cobalt, which was previously the primary canponent of high-energy magnets. These materials are generally produced by annealing rapidly solidified ribbons or by conventional powder metallurgy techniques. This paper will report results from an analytical electron microscopy characterization undertaken to establish the relationship between the magnetic properties and the microstructure of two iron/rare-earth/boron (Fe/RE/B) alloys. Ribbons of Fe75Pr15B10 and Fe77Tb15B8 were produced by melt-spinning. To obtain optimum magnetic properties, both alloys were then annealed at 700°C, the FePrB ribbons for 6 minutes and the FeTbB ribbons for 90 minutes. Foils for transmission electron microscopy were prepared by ion-milling the ribbons on a cold stage and examined using a Philips 400T TEM/STEM equipped with an energy dispersive x-ray unit.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 199
Copyright
Copyright © Materials Research Society 1986

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References

REFERENCES

1.El-Masry, N.A. and Stadelmaier, H.H., Mater. Lett. 3 (9,10), 405–408 (1985).Google Scholar
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3.Stadelmaier, H.H. and El-Masry, N.A., Proceedings of the 4th International Symposium on Magnetic Anisotropy and Coercivity in Rare Earth-Transition Metal Alloys, Dayton, (OH, 613–631 (1985).Google Scholar