Novel ${\hbox {Fe}}_{(97-{\rm x-y})}{\hbox {P}}_{\rm x}{\hbox {B}}_{\rm y}{\hbox {Nb}}_{2}{\hbox {Cr}}_{1}$ Glassy Alloys With High Magnetization and Low Loss Characteristics for Inductor Core Materials

Fe–B–P–Cu nanocrystalline soft magnetic alloys with high Bs

“…1 shows the DSC curves for the as-quenched Fe 80.8 B 10 P 8 Cu 1.2 , Fe 82.8 B 9 P 7 Cu 1.2 and Fe 84.8 B 8 P 6 Cu 1.2 alloy ribbons, together with the data of the Fe 82 B 10 P 8 and Fe 78 B 10 P 8 Nb 4 alloy ribbons. The Fe 82 B 10 P 8 alloy ribbon shows a sharp exothermic peak and the Fe 78 B 10 P 8 Nb 4 alloy ribbon shows the glass transition, followed by a supercooled liquid region and high glass-forming ability [1][2][3]. On the other hand, the Fe-B-P-Cu alloy ribbons show two separated distinct exothermic peaks upon heating, and temperature intervals between each one are 73 K, 103 K and 123 K, respectively.…”

“…We have already reported that the replacement of Fe by Nb is effective for the enhancement of the glass forming ability in a Fe-B-P system, and that Fe-B-P-Nb glassy alloy shows excellent soft magnetic properties compared with commercial alloys [1][2][3]. However this alloy has relatively low saturation magnetic flux density (B s ) of 1.2-1.3 T for the addition of Nb element and large saturation magnetostriction ( s ) of 17 × 10 −6 .…”

Iron-based bulk metallic glasses

“…As a result, the Liqualloy electromagnetic sheet for radio frequency identification system has been used in higher functional cell phones. In addition, another type of soft magnetic powder core has been produced in the Fe-Nb-B-Si and Fe-Nb-Cr-P-B-Si systems 247 with a high saturation magnetisation of 1?3 T. The cores were also produced by a procedure similar to that for Liqualloy, i.e. mass production of spherical glassy alloy powder by water atomisation, followed by cold consolidation of the mixture of glassy alloy powder and epoxy resin and then annealing.…”

“…Besides, the higher saturation magnetisation has enabled use of the cores in a higher current range. The fundamental characteristics of SENNTIX are summarised in Table 7, 247 together with other Fe-Si-B-M (M5alloying additions) systems named as FINEMET 248 and other Fe-based alloys.…”

Spatial Distributions of Alloying Elements Obtained from Atom Probe Tomography of the Amorphous Ribbon Fe75C11Si2B8Cr4

“…In general, amorphous alloys are known to be chemically/structurally homogeneous. 1,2) However, detailed studies on the atomic arrangements of specific amorphous alloys reveal nano-scale segregation zones of specific elements significantly affecting macroscopic properties of amorphous alloys. [3][4][5][6] Therefore, information on the spatial distribution of supersaturated alloying elements is important to understand macroscopic properties of the amorphous alloy.…”