Effect of grain growth inhibitors on the hysteresis properties of Nd₁₀Fe₈₂C₆B₂melt-spun alloys

Authors

M. Daniil, Department of Physics and Astronomy, University of Delaware, Newark, DE
Y. Zhang, Department of Physics and Astronomy, University of Delaware, Newark, DE
H. Okumura, Department of Physics, University of Delaware, Newark, DE
George C. Hadjipanayis, University of DelawareFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

9-1-2002

Comments

Published by IEEE; IEEE Trans. Magn. 38, No. 5, 2973-2975 (2002). ©2002 IEEE. Permission to use. http://ieeexplore.ieee.org/

Abstract

An effort has been made to improve the coercivity of nanocomposite Nd₁₀Fe₈₂C₆B₂ alloys, using small amounts (up to 1 at%) of Cr, Ti, Nb, Zr, and Ga. X-ray studies revealed that the amount of –Fe phase in both as-spun and annealed ribbons was significantly reduced for Nb and Zr substitutions, but increased for all the other substitutions. From the magnetic properties point of view, Zr (1 at%) was proven to be the most advantageous of all, since it increased the coercivity of annealed ribbons from 3.2 to 4.8 kOe and the maximum energy product from 5.8 to 13 MGOe. This improvement is associated with the much finer and more uniform microstructure as was revealed by transmission electron microscopy.