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Analytical Electron Microscope Study of High- and Low-Coercivity SmCo 2:17 Magnets

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Abstract

Sintered, precipitation hardened SmCo 2:17 magnets contain a multiphase microstructure. Our electron microscopic investigations reveal that the size of the rhombic, cellular precipitation structure and the formation of cell interior and cell boundary phases is determined by the nominal composition of the alloy and the postsintering heat treatment conditions and primarily control the intrinsic coercivity of the magnet. Selected area electron diffraction together with high resolution electron microscopy showed a high density of basal stacking faults (microtwinning) of the cell interior phase of low coercivity (iHc < 700 kA/m) magnets with a (c/a)*- ratio of the basic structural unit of > 0.843. High coercivity magnets (iHc>) 1000 kA/m), containing a high density of the platelet phase perpendicular to the c-axis, exhibit cell diameters up to 200 nm with a (c/a)*-ratio of the basic structural unit of the cell interior phase of < 0.843.

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References

  1. J.D. Livingston and D.L. Martin, J. Appl. Phys. 48, 1350 (1977).

    Article  CAS  Google Scholar 

  2. R.K. Mishra, G. Thomas, T. Yoneyama, A. Fukuno and T. Ojima, J.Appl.Phys. 52, 2517 (1981).

    Article  CAS  Google Scholar 

  3. G.C. Hadjipanayis, E.J. Yadlowsky and S.H. Wollins, J. Appl. Pys. 53, 2386 (1982).

    Article  CAS  Google Scholar 

  4. J. Fidler and P. Skalicky, J. Magn. Magn. Mat. 27, 127 (1982).

    Article  CAS  Google Scholar 

  5. J. Fidler, P. Skalicky and F. Rothwarf, IEEE Trans. Magn. MAG-19, 2041 (1983).

    Article  CAS  Google Scholar 

  6. C.W. Allen, D.L. Kuruzar and A.E. Miller, IEEE Trans. Mag. MAG-10, 716 (1974).

    Article  CAS  Google Scholar 

  7. Y. Khan, Acta Cryst. B29, 2502 (1973).

    Article  Google Scholar 

  8. Q. Johnson, G.S. Smith and D.H. Wood, Acta Cryst. B25, 464 (1969).

    Article  Google Scholar 

  9. A.E. Ray, Proc. of Soft and Hard Magnetic Materials with Applications, Lake Buena Vista, Florida, Oct.1986, to be published by ASM.

  10. Y. Khan, Pys. Stat. Sol.(a) 21, 69 (1974).

    Article  CAS  Google Scholar 

  11. J. Fidler, P. Skalicky and F. Rothwarf, Mikrochimica Acta [Wien] Suppl. 11, 371, (1985).

    CAS  Google Scholar 

  12. A.E. Ray, J. Appl. Phys. 55, 2094 (1984).

    Article  CAS  Google Scholar 

  13. A.E. Ray, IEEE Trans. Magn. MAG-20, 1614 (1984).

    Article  CAS  Google Scholar 

  14. J. Fidler, J. Mag. Magn. Mat. 30, 58 (1982).

    Article  CAS  Google Scholar 

  15. H. Kronmüller, K.D. Durst, W. Ervens and W. Fernengel, IEEE Trans. Magn. MAG-20, 1569 (1984).

    Article  Google Scholar 

  16. L. Rabenberg, R.K. Mishra and G. Thomas, J. Appl.Phys. 53, 2389 (1982).

    Article  CAS  Google Scholar 

  17. J. Fidler, R. Grössinger, H. Kirchmayr and P. Skalicky, ERO - Report of U.S. Army, Pr.No. DAJA (1983) 37-82-C-0050.

  18. J. Fidler and P. Skalicky, Radex-Rundschau 2/3, 63 (1986).

    Google Scholar 

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Authors and Affiliations

  1. Institute of Applied and Technical Physics, University of Technology, Karlsplatz 13, A-1040, Vienna, Austria

    Josef Fidler, J. Bernardi & P. Skalicky

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  1. Josef Fidler
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  2. J. Bernardi
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  3. P. Skalicky
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Fidler, J., Bernardi, J. & Skalicky, P. Analytical Electron Microscope Study of High- and Low-Coercivity SmCo 2:17 Magnets. MRS Online Proceedings Library 96, 181 (1987). https://doi.org/10.1557/PROC-96-181

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  • DOI: https://doi.org/10.1557/PROC-96-181

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