Composition dependence of the microstructure and soft magnetic properties of Fe-based amorphous/nanocrystalline alloys: A review study

Glass Forming Ability, Thermal Stability, and Magnetic Properties of FeCoNiBSi Alloys with Different B Contents

“…T x2 e value of Ms rst increases gradually from 0.89 T to 0.90 T with the increase of B content from 12 at.% to 14 at.% and then sharply decreases to 0.72 T as the B content is up to 18 at.% because of the reduction in the amount of ferromagnetic elements (Fe, Co, and Ni) [15]. Meanwhile, the Hc changes in the same manner with the increase of B content and exhibits the minimum of 10.15 A/m at the B content of 12 at.%.…”

“…e metalloid element of boron (B) is beneficial to the glass formation ability improvement, amorphous structure stabilization, and grain refinement for the Fe-based amorphous alloys [15]. It is well known that Fe-B amorphous alloys can be formed in the composition with B content in the range of 12-28% at.% [16] by melt-spinning process.…”

Thermal stability, dynamic mechanical analysis and nanoindentation behavior of FeSiB(Cu) amorphous alloys

“…It seems that the stability of the amorphous phase in Zr-containing alloys (Nanoperm) is better than Nb-containing alloys (Finement); however, the new system has never been commercialized which is due to the strong tendency of oxidation in the presence of oxygen and as a result good casting skills and protective atmosphere are required [3][4][5].…”

“…The soft magnetic properties of the Finement alloys highly depend on the primary composition and microstructural features particularly grain size. For instance, B improves the GFA and refines the grain size through stabilizing the remaining amorphous matrix; however, higher percentage of B can also lead to the formation of high anisotropy phases such Fe 2 B and/or Fe 3 B being detrimental for soft magnetic behavior [3,9,10]. Cu is immiscible in Fe-based system and can provide heterogeneous nucleation sites for α-Fe(Si) nanoparticles which can lead to a fine and uniform dispersion of the α-Fe(Si) particles being essential for desirable soft magnetic behavior.…”

Syntheses and Fundamental Properties of Fe-rich Metastable Phase Alloys with Saturation Magnetization Exceeding 1.9 T

“…More recently, the higher saturation magnetization reaching about 1.7 T in conjunction with low coercivity below 5 A/m has been attained for new Fe-based alloy ribbons with a thickness up to about 50 μm [10] . The new Fe-based alloys are located in a maximum Fe-rich concentration range and the further increase in Fe content causes significant decrease in soft magnetic properties as well as the loss of good bending ductility for the melt-spun ribbons 11 . The brittle nature reduces significantly the engineering value as soft magnetic materials 12,13 .…”