Soft magnetic Co-based bulk amorphous alloy with high saturation induction density and preparation method of amorphous alloy

Abstract

The invention provides a soft magnetic Co-based bulk amorphous alloy with high saturation induction density. The component formula of the alloy is CoaFebNicBdSiePfCg, a, b, c, d, e, f and g representatomic percent content of components respectively and meet following conditions: a is larger than 35 and smaller than or equal to 65, b is larger than or equal to 10 and smaller than or equal to 35, clarger than or equal to 0 and smaller than or equal to 5, the sum of b and c is larger than or equal to 10 and smaller than or equal to 35, d is larger than or equal to 5 and smaller than or equal to20, e is larger than or equal to 5 and smaller than or equal to 10, f is larger than or equal to 0 and smaller than or equal to 5, g is larger than or equal to 0 and smaller than or equal to 5, the sum of f and g is larger than or equal to 3, the sum of d, e, f and g is larger than or equal to 20 and smaller than or equal to 30, and the sum of a, b, c, d, e and f is equal to 100. The technical problems that the alloy cannot realize high amorphous forming ability and saturation magnetic induction (Bs) and cost are high due to the fact that existing Co-based bulk amorphous alloy contains pre-transition elements or rare earth element are solved.

Description

technical field [0001] The present invention relates to the technical field of new materials, in particular, to a kind of non-pre-transition group metal and rare earth element, with high saturation magnetic induction (B s ) and Curie temperature (T c ), low coercivity (H c ), a high-strength Co-based bulk amorphous alloy and a preparation method thereof. Background technique [0002] Amorphous alloy (also known as metallic glass) has physical, chemical and mechanical properties superior to general crystalline metal materials due to its unique long-range disordered and short-range ordered atomic arrangement structure, such as high strength and hardness, high toughness, Low elastic modulus, high resistivity, high corrosion resistance and superplastic processing formability in the supercooled liquid phase range, etc. For Fe and Co-based amorphous alloys, it also has excellent soft magnetic properties. Amorphous alloys have broad application prospects in the fields of energy...

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Problems solved by technology

[0006] For the existing Co-based bulk amorphous alloys contain former transition group elements or rare earth elements, it is difficult for the alloy to have both strong amorphous forming ability and high B s , the technical problem of high cost, the present invention provides a kind of do not contain former transition group element or rare earth element, have high B at the same time s and T c , low H c , a high-strength Co-based bulk amorphous alloy and a preparation method thereof, the amorphous alloy can be prepared by a copper mold casting method under air to obtain a bulk amorphous alloy rod with a diameter of 1 to 3 mm, and its B s 0.95~1.24T, H c 0.5~4.6A / m, μ at 1kHz e 16200~30600, T c 451~516℃, compressive yield strength is 3.2~3.6GPa, compressive plastic strain is 0.3~2.5%

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