Abstract
The effect of B and P content on the amorphous forming ability (AFA), thermal stability, amorphous stability, and structural behavior was investigated in Fe-B-Nb-P alloys using metallic ribbons produced by a single-roller melt-spinning method. The maximum thickness, $t_{\mathbf {max}}$ , indicating AFA of Fe84-{x}B9Nb7Px ( ${x} =0$ –4), increased from 19.5 to $68.7~\mu \text{m}$ . The alloys exhibited two exothermic peaks to have resulted from the formation of bcc $\alpha $ -Fe and borides, respectively. The Fe84-{x}B9Nb7Px ( ${x} =0$ –3) alloys with the wide interval between two exothermic peaks exhibited the high thermal stability compared to the commercialized composition of Fe73.5Si13.5B9Nb3Cu1. The wide range between the glass transition temperature and crystallization temperature means the super-cooled liquid region, leading to obtain the high stable amorphous phase. The super-cooled liquid region was observed in Fe81-{y}B9+{y}Nb7P3 ( ${y} =0$ –2) alloys and the endothermic reaction of the super-cooled liquid region got larger by increasing B content. The $\alpha $ -Mn type structure was observed in Fe80B10Nb7P3 alloy annealed at 823 K, and it was considered to improve the amorphous stability. The Fe81B9Nb7P3 alloy with a high AFA of $68.7~\mu $ m exhibited excellent magnetic characteristics, $B_{s}$ of 1.51 T and $H_{c}$ of 4.7 A/m.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call