Effects of high boron content on crystallization, forming ability and magnetic properties of amorphous Fe91−Zr5B Nb4 alloy

Abstract The effect of boron (B) on crystallization, glass forming ability (GFA) and magnetic properties of amorphous Fe91−xZr5BxNb4 (FZBN) was studied in the B content (XB) ranging from 0 to 36 at.%. The GFA changes with B content and reaches maximum near eutectic composition of 27.5 at.% B. Fully amorphous FZBN was prepared by melt-spinning in the B content between 5 and 30 at.%. Amorphous FZBN crystallizes in primary crystallization mode in low B content range of XB⩽20 at.%, but in eutectic mode in high B range of 20