화학공학소재연구정보센터
Materials Science Forum, Vol.386-3, 441-446, 2002
Bulk Fe-Based metallic glass with extremely soft ferromagnetic properties
We have investigated the DC and AC magnetic properties of a bulk glassy Fe65.5Cr4Mo4Ga4P12B5.5C5 alloy. In the annealed state the alloy has coercivity H-C and maximum DC permeability mu(m) of approximately 0.4 A/m (5 mOe) and 2.8x10(5), comparable to those found in annealed zero-magnetostriction Co-based alloys. The low H-C found in our bulk glassy alloy is attributed to the low ratio of surface-roughness to sample thickness, and low residual internal-stress. The total power loss in our annealed bulk glass is about one order of magnitude lower than that of rapidly quenched Fe-based glassy ribbons. This is attributed to a low anomalous eddy-current loss.