FeSiBP Bulk Metallic Glasses with Unusual Combination of High Magnetization and High Glass-Forming Ability

Abstract

Among many kinds of bulk metallic glasses (BMGs), Fe-based BMGs with good magnetic properties, high strength and low materials cost should have great potential for wide variety of applications. However, the glass-forming metal elements such as Al, Ga, Nb, Mo, Y and so forth in the Fe-based BMGs significantly decrease saturation magnetization (J s ) which is a essential property as soft magnetic materials and also increase the material cost.The coexistence of high Fe content and high glass-forming ability (GFA) has been earnestly desired from academia to industry. We report a novel Fe 76 Si 9 B 10 P 5 (at%) bulk metallic glass with unusual combination of high J s of 1.51 T due to high Fe content and high GFA leading to a glassy rod with a diameter of 2.5 mm despite not-containing any glass-forming metal elements. This alloy composed of familiar and low-priced elements, also exhibiting very excellent magnetic softness and rather high strength, has a great advantage for engineering and industry, and thus should make a contribution to conservation of earth resources and environment through energy saving.

Effects of P Addition on Corrosion Properties of Soft Magnetic FeSiB Alloys

“…2) Excellent soft magnetic properties, such as a low coercivity (³1 A/m), can be obtained by adding metallic and/or metalloid elements (Nb, 3,4) Al, 5) Zr 6) or P 7,8) ) to the FeSiB based materials.…”

Effect of Cr Addition on the Glass-Forming Ability, Magnetic, Mechanical and Corrosion Properties of (Fe<SUB>0.76</SUB>Si<SUB>0.096</SUB>B<SUB>0.096</SUB>P<SUB>0.048</SUB>)<SUB>100&minus;<I>x</I></SUB>Cr<I><SUB>x</SUB></I> Bulk Glassy Alloys

“…In this study, based on Fe 76 Si 9:6 B 9:6 P 4:8 BGA 16,17) with high GFA leading to the glassy rods with diameters up to 2.5 mm, the effect of Cr addition on the GFA, magnetic and corrosion properties was discussed. It was found that the addition of small amounts of Cr slightly decreases the magnetic properties, but is very effective in improving corrosion resistance and enlarging the GFA for this Fe-based BGA.…”

Effect of Boron Additions on Glass Formation and Magnetic Properties of Fe-Co-Ti-Zr-B Amorphous Ribbons

“…In general, it is well known that the contents of metalloid elements, such as P, C, Si, and B, play a significant role in the formation of metallic glasses in the Fe-based amorphous alloys [10][11][12][13]. In particular, due to atomic interaction and large atomic size differences between B and transition metals, the suitable ratios of B to transition metals, such as Fe, Co, and Ni, lead to the enhancement of its GFA and thermal stability of amorphous alloys.…”