Effect of rare earth additions on microstructure, thermal stability and crystallization behavior of melt spun Fe80.65Cu1.35Si2B14RE2 (RE=Y, Gd, Tb and Dy) soft magnetic alloys

摘要

The influences of RE alloying additions (Y, Gd, Tb and Dy) on the microstructure, thermal stability and crystallization behavior of melt spun Fe80.65Cu1.35Si2B14RE2 alloys have been systematically investigated. Substituting 2 at% iron atoms by rare earth elements significantly improve the amorphous forming ability and thermal stability of the alloys. The primary crystallization temperatures are increased for at least 55 degrees C. The crystallization behavior is dramatically changed with a steady existence of metastable Fe3B phase in the second stage of crystallization during the annealing process. For Fe80.65Cu1.35Si2B14Gd2 alloy, the Fe3B phase can be stably exist even the temperature rise up to 600 degrees C. The addition of Y is found to be beneficial for the soft magnetic application of the alloy. (C) 2015 Elsevier B.V. All rights reserved.