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. 2013:3:1455.
doi: 10.1038/srep01455.

High-entropy alloys with high saturation magnetization, electrical resistivity, and malleability

Yong Zhang  1 , TingTing Zuo, YongQiang Cheng, Peter K Liaw
Affiliations

High-entropy alloys with high saturation magnetization, electrical resistivity, and malleability

Yong Zhang et al. Sci Rep. 2013.

Abstract

Soft magnetic materials (SMMs) find important applications in a number of areas. The diverse requirements for these applications are often demanding and challenging for the design and fabrication of SMMs. Here we report a new class of FeCoNi(AlSi)x (0 ≤ x ≤ 0.8 in molar ratio) SMMs based on high-entropy alloys (HEAs). It is found that with the compositional and structural changes, the optimal balance of magnetic, electrical, and mechanical properties is achieved at x = 0.2, for which the combination of saturation magnetization (1.15 T), coercivity (1,400 A/m), electrical resistivity (69.5 μΩ·cm), yield strength (342 MPa), and strain without fracture (50%) makes the alloy an excellent SMM. Ab initio calculations are used to explain the high magnetic saturation of the present HEAs and the effects of compositional structures on magnetic characteristics. The HEA-based SMMs point to new directions in both the application of HEAs and the search for novel SMMs.

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Figures

Figure 1
Figure 1. Magnetic properties of FeCoNi(AlSi)x (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.8) alloys (Hc and Ms represent the coercivity and saturation magnetization, respectively).
Figure 2
Figure 2. The electrical resistivity (ρ) of FeCoNi(AlSi)x alloys obtained at room temperature.
Figure 3
Figure 3. Engineering stress-strain curves of FeCoNi(AlSi)x alloys compressed at a strain rate of 2 × 10−4/s at room temperature.
Figure 4
Figure 4. XRD patterns of the as-cast FeCoNi(AlSi)x alloys.
Figure 5
Figure 5. SEM backscattering electron images of FeCoNi(AlSi)x alloys, (a) x = 0, (b) x = 0.1, (c) x = 0.2, (d) x = 0.3, (e) x = 0.4, (f) x = 0.5, and (g) x = 0.8.
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References

    1. Yeh J. W. et al. Nanostructured high-entropy alloys with multiple principal elements novel alloy design concepts and outcomes. Adv. Eng. Mater. 6, 299–303 (2004).
    1. Senkov O. N., Wilks G. B., Scott J. M. & Miracle D. B. Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys. Intermetallics 19, 698–706 (2011).
    1. Guo W. et al. Local Atomic structure of a high-entropy alloy: an X-ray and neutron scattering study. Metall. Mater. Trans. A, 10.1007/s11661-012-1474-0 (2012).
    1. Tung C. C. et al. On the elemental effect of AlCoCrCuFeNi high-entropy alloy system. Mater. Lett. 61, 1–5 (2007).
    1. Tsai C. W., Chen Y. L. & Tsai M. H. Deformation and annealing behaviors of high-entropy alloy Al0.5CoCrCuFeNi. J. Alloys Compd. 486, 427–435 (2009).

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