Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-01-15T00:56:48.492Z Has data issue: false hasContentIssue false
  • English
  • Français

Elevated Temperature Properties of Sintered Magnets of (Nd,Dy)-Fe-B Modified with Cobalt and Aluminum

Published online by Cambridge University Press:  25 February 2011

Y. Xiao ,
H. F. Mildrum ,
K. J. Strnat  and
A. E. Ray
Y. Xiao
Affiliation:
School of Engineering, University of Dayton Dayton, Ohio 45469
H. F. Mildrum
Affiliation:
School of Engineering, University of Dayton Dayton, Ohio 45469
K. J. Strnat
Affiliation:
School of Engineering, University of Dayton Dayton, Ohio 45469
A. E. Ray
Affiliation:
School of Engineering, University of Dayton Dayton, Ohio 45469
Get access

Abstract

The effect of small aluminum additions on the temperature dependence of remanence and intrinsic coercivity in Co- and Dy-containing Nd-Fe-B was studied. Sintered magnets were prepared and demagnetization curves measured at temperatures between −50 to +200°C. Curie temperatures and irreversible flux losses in open circuit were determined. Al increases the coercivity while decreasing remanence, energy product and Curie temperature. Other unfavorable side effects are the increase in temperature coefficients of Br and, especially, MHc. Substitution of Al is not beneficial for magnets used at elevated temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 96: Symposium F – High Performance Permanent Magnet Materials , 1987 , 155
Copyright
Copyright © Materials Research Society 1987

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. Sagawa, M. et al., IEEE Trans. Magnetics MAG–20, (1984), 1584–1589.Google Scholar
2. Shibata, T. et al., IEEE Trans. Magnetics MAC–21, (1985), 1952–1954.Google Scholar
3. Matsuura, et al., Appl. Phys. Letters 46, 308 (1985).Google Scholar
4. Tokunaga, M. et al., IEEE Trans. Magnetics MAG–22, (1986), 904.Google Scholar
5. Zhang, M. (Maocai) et al., Proc. 8th Int'l. Workshop on REPM and their Applications, Dayton, OH, USA, May 1985, 541–552.Google Scholar
6. Ma, B.-M. (Bao-Min) and Narasimhan, K.S.V.L., IEEE Trans. Magnetics MAG–22, (1986), 916–918.Google Scholar
7. Mizoguchi, T. et al., IEEE Trans. Magnetics MAG–22, (1986), 919–921.Google Scholar
8. Mildrum, H.F. and Wong, K.M.D., Proc. 2nd Int'l. Workshop on REPM and their Applications, Dayton, OH, USA, (1976), 35–54.Google Scholar
9. Li, D., Strnat, K.J. and Mildrum, H.F., J. Appl. Physics, 57, (1985), 4140.Google Scholar
10. Xiao, Y. et al., INTERMAG 1987, to be published in IEEE Trans. Magnetics, MAG-23 (Sep. 1987).Google Scholar