Abstract
The effect of minor Sn on crystallization behavior, soft magnetic properties and corrosion resistance of Fe83B10-xC3Si3P1Snx (x = 0.25, 0.5 and 0.75) amorphous alloys was investigated. Sn added alloys exhibit excellent saturation magnetic flux density (Bs) of 1.63–1.72 T, low coercivity of 2.5–5.4 A/m and higher corrosion resistance. Furthermore, coercivity of as-spun alloys is lowered by Sn addition, and mechanisms behind the change of soft magnetic properties were discussed. The finding suggests that soft metal Sn may act as a stress reliever in as-spun alloys, leading to low coercivity while maintaining ductility. This theory was then confirmed in high Co content amorphous alloys with Bs of 1.75 T, in which case Sn addition causes significant reduction of coercivity but no decline of Bs. The present strategy of Sn addition may pave a new and universal way for Fe-based amorphous alloys to simultaneously obtain high Bs, lower Hc and high ductility.
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