FeNi-based bulk glassy alloys with superhigh mechanical strength and excellent soft-magnetic properties

Abstract

Articles you may be interested inEnhancement of glass-forming ability of FeCoNiBSiNb bulk glassy alloys with superhigh strength and good softmagnetic properties

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

“…The development of BMGs overcame the great disadvantage of the melt-spun amorphous ribbons. However, the glass-forming metal elements in BMGs result in a remarkable decrease in saturation magnetization (J s ) from 1.5-1.6 T of the representative Fe-Si-B amorphous alloys widely utilized by industries 7) to less than about 1.3 T. The magnetic elements such as Co and Ni also have some beneficial effects on the GFA in most cases, 8,9) however, the addition of these elements to Fe-based BMGs significantly decreases J s in the same manner as the glass-forming elements; the substitution of Co for Fe at 50 at% in (Fe 0:75 Si 0:10 B 0:15 ) 96 Nb 4 significantly increases the critical rod-size of 1.5 mm to 5 mm in diameter, which is the largest size among the soft magnetic BMGs produced by Cu-mold casting, however, rapidly decreases to 1.1 T.…”

Ductile Fe-Based BMGs with High Glass Forming Ability and High Strength

“…14) To synthesize Febased BMGs with higher GFA and more excellent ductility, we tried to substitute part of Fe with Ni in Fe-Mo-P-C-B alloy system, basing on the consideration that nickel is soft and has ever been successfully substituted for Fe to enhance the GFA of Fe-based BMGs. 12) As a result, Fe-based BMGs with diameter up to 5 mm and plastic strain up to 4% are synthesized in Fe 74Àx Ni x Mo 6 P 10 C 7:5 B 2:5 alloy system. In this paper, we will investigate how the GFA and mechanical properties varying with Ni content, and the relations of the serrated flow characteristic on the compressive stress-strain curves with the glass transition temperature of glassy alloys.…”

“…Mechanical properties of bulk Fe-based glasses have absorbed researcher's interest in the recent years. [6][7][8][9][10][11][12][13] Although most Fe-based BMGs are reported to possess high strength over 3 GPa, their plastic strain is usually less than 0.5% [6][7][8][9][10][11][12] except for a plastic strain of 1.9% for Fe-Nb-Si-B. 13) Recently, we have reported Fe-Mo-P-C-B BMG with diameter of 2 mm combined with larger plastic strain and good soft magnetic properties.…”

Magnetocaloric effect and refrigeration cooling power in amorphous Gd7Ru3 alloys

“…On the other hand, metallic glasses/ amorphous alloys display very unique properties, such as, (i) soft magnet with second order magnetic transition, reduced coercivity, and high permeability; (ii) tunable transition temperature by composition or annealing which is useful in application of magnetic refrigeration [11][12][13][14][15] taking these parameters into consideration, we study the magnetic, heat capacity and magnetocaloric effect in amorphous Gd 7 spreads over 2 to above 120 K temperature range in 50 kOe field required for practical magnetic refrigerant system.…”