Li Y, Wang Z, Zhang W. AIP Advances, 2018, 8(5): 056115.

Abstract:

The effects of Cu alloying on the amorphous-forming ability (AFA) and magnetic properties of the P-free Fe₈₁Co₅B₁₁C₂Si₁ amorphous alloy were investigated. Addition of ≤ 1.0 at.% Cu enhances the AFA of the base alloy without significant deterioration of the soft magnetic properties. The Fe_80.5Co₅B₁₁C₂Si₁Cu_0.5 alloy with the largest critical thickness for amorphous formation of ∼35 μm possesses a high saturation magnetization (B_s) of ∼1.78 T, low coercivity of ∼14.6 A/m, and good bending ductility upon annealing in a wide temperature range of 513–553 K with maintaining the amorphous state. The fabrication of the new high-Fe-content Fe-Co-B-C-Si-Cu amorphous alloys by minor doping of Cu gives a guideline to developing high B_s amorphous alloys with excellent AFA.

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