Crystallization Behavior of FeSiBPCu Nanocrystalline Soft-Magnetic Alloys with High Fe Content

摘要

Crystallization behaviors of Fe83.3Si4B12-xPxCu0.7 (x = 0-8) nanocrystalline alloys containing precipitated phases corresponding to the compositions and stages, crystallization kinetics, as well as the solute atom distributions after nanocrystallization were studied detailedly. The P containing alloys have higher nanocrystallization activation energy and frequency factor which is benefit to form more uniform microstructure with high density of alpha-Fe(Si) grains. During nanocrystallization, P and B are excluded to the residual amorphous phase, while Si is partitioned in the alpha-Fe(Si) phase. The formation of Fe-3(B, P) with more complex structure makes the second crystallization require longer range atom rearrangements and results in the enhanced thermal stability of the residual glassy phase against crystallization.