Effect of Mn Substitution Fe on the Formability and Magnetic Properties of Amorphous Fe88Zr8B4 Alloy

Abstract

Elemental substitution is commonly used to improve the formability of metallic glasses and the properties of amorphous alloys over a wide compositional range. Therefore, it is essential to investigate the influence of element content change on the formability as well as magnetic and other properties. The purpose is to achieve tailorable properties in these alloys with enhanced glass forming ability. In this work, the glass-forming ability (GFA) and magnetic properties of the minor Mn-substituted Fe88Zr8B4 amorphous alloy were investigated. The addition of Mn improving the amorphous forming ability of the alloy. With the addition of Mn, the magnetic transition temperature, saturation magnetization and the magnetic entropy changes (−ΔSm) peaks decreased simultaneously, which is possibly caused by the antiferromagnetic coupling between Fe and Mn atoms. The dependence of −ΔSmpeak on Tc displays a positive correlation compared to the −ΔSmpeak- Tc−2/3 relationship proposed by Belo et al.

Excellent Magnetocaloric Performance of the Fe87Ce13−xBx (x = 5, 6, 7) Metallic Glasses and Their Composite

“…Each set of point plots is linearly fitted well, and the slope (expressed by n ) of the linear fitting is 0.756 for x = 5, 0.759 for x = 6, and 0.750 for x = 7, respectively. The values of n are consistent with that of other MGs [ 16 , 17 , 18 , 23 , 24 , 25 , 26 , 29 , 30 ] but slightly larger than the predicted value of the mean field model [ 35 ]. This deviation is mainly caused by local inhomogeneity in MGs because the presence of short-range ordered clusters in MGs leads to a magnetic transformation in a wide temperature range [ 17 ].…”

“…Figure 5 a displays the −Δ S m peak under 5 T of the Fe 87 Ce 13−x B x (x = 5, 6, 7) amorphous ribbons and some Fe-Zr-B-based MGs [ 15 , 16 , 17 , 18 , 23 , 24 , 25 , 26 , 36 ]. A positive correlation between −Δ S m peak and T c was observed in the Fe-Zr-B-based MGs, implying that the higher −Δ S m peak can only be achieved at higher temperatures for the Fe-Zr-B-based MGs, which is very unfriendly for the application of magnetic refrigeration at room temperature.…”

“…Additionally, the presence of magnetic hysteresis and thermal hysteresis in these compounds prevents them from operating at high frequencies with fast response. On the contrary, the metallic glasses (MGs) that exhibit a broader −Δ S m peak (−Δ S m peak ) without magnetic hysteresis and thermal hysteresis are preferred, such as Gd-based and Fe-based MGs [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. The tunable Curie temperature ( T c ) in a wide range of composition adjustments is beneficial for constructing the flattened −Δ S m curve [ 15 , 16 , 17 ].…”

“…Compared with rare-earth (RE)-based MGs, Fe-based MGs show greater application value in civil aspects (such as magnetic refrigerators, air conditioners, wine cabinets, and so on) due to their lower cost and better glass forming ability (GFA), but the −Δ S m peak of these Fe-based MGs is not as high as that of RE-based MGs [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Therefore, improving the −Δ S m peak of the Fe-based MGs as much as possible is a top priority for the civil application of MR technology.…”

“…Therefore, improving the −Δ S m peak of the Fe-based MGs as much as possible is a top priority for the civil application of MR technology. Amongst these reported Fe-based MGs, Fe-Zr-B-based MG ribbons are the outstanding ones [ 15 , 16 , 17 , 18 , 23 , 24 , 25 , 26 ]. For example, the Fe-Zr-B ternary amorphous ribbons exhibited a −Δ S m peak under 5 T of 2.75–3.34 J/(kg × K) at the T c ranging from 271 K to 327 K [ 18 , 24 ].…”