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Formation and properties of Fe25Co25Ni25(P, C, B, Si)25 high-entropy bulk metallic glasses
2018-04-15 22:20  

Xu Y, Li Y, Zhu Z, et al. Journal of Non-Crystalline Solids, 2018, 487: 60-64.

Abstract:

New ferromagnetic high-entropy bulk metallic glasses (HE-BMGs) with superior glass-forming ability (GFA) and high strength were developed in the pseudo quaternary FeCoNi(P, C, B, Si) system. The HE-BMG rods were fabricated by copper mold casting method in the composition range of Fe25Co25Ni25(P0.3–0.5C0.1–0.3B0.2–0.3Si0.1–0.3)25, in which the Fe25Co25Ni25(P0.4C0.2B0.2Si0.2)25and Fe25Co25Ni25(P0.5C0.1B0.2Si0.2)25alloys possess the largest critical diameter of 2.0?mm. The HE-BMGs exhibit excellent soft magnetic and mechanical properties, i.e., low coercivity of 0.8–2.1?A/m, high saturation magnetization of 0.80–0.86?T, high compressive yield strength of 2970–3076?MPa, and large plastic strain of 1.9–2.1%. The mechanisms of the high GFA and good magnetic softness of the alloys were discussed.

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