A fe-b-si-based bulk amorphous alloy with high saturation magnetization

Abstract

The invention discloses a Fe-B-Si iron-based bulk amorphous alloy and belongs to the field of amorphous alloys. The chemical components of the amorphous alloy are designed to be FeaBbSicTidZre according to the atomic ratio. The component features include: a is larger than or equal to 75 but smaller than or equal to 79; b is larger than or equal to 12 but smaller than or equal to 19; c is larger than or equal to 2 but smaller than or equal to 9; d is larger than or equal to 0 but smaller than or equal to 5; e is larger than or equal to 1 but smaller than or equal to 3.5; d+e is larger than or equal to 1 but smaller than or equal to 6; a+b+c+d+e is equal to 100. The Fe-based amorphous alloy has the characteristics that high Fe content and good amorphous forming ability are achieved. High saturation magnetization of the alloy is guaranteed by the aid of high Fe content, and meanwhile low coercive force of the alloy is guaranteed through the alloy amorphous characteristic. Accordingly, the Fe-B-Si bulk amorphous alloy is good in the application prospect in the field of soft magnetic materials.

Description

technical field [0001] The invention belongs to the field of amorphous alloys, in particular to an Fe-B-Si bulk amorphous alloy with high saturation magnetization and better amorphous forming ability. Background technique [0002] In 1995, Inoue et al. from Tohoku University in Japan prepared Fe with a diameter of 1 mm for the first time by copper mold casting. 73 al 5 m 2 P 11 C 6 B 4 (M is Ga or Ge) bulk amorphous alloy, which also has good soft magnetic properties, its saturation magnetization is 1.29T, and its coercive force is 6.8A / m. [0003] Since the report of Fe-based bulk amorphous alloys, the development and research of soft magnetic Fe-based bulk amorphous alloys has been developed rapidly. At present, the main Fe-based bulk amorphous soft magnetic alloy systems mainly include the following: Fe-(Al,Ga)-(P,C,B,Si); Fe-Co-Ni-(Zr,Nb,Hf, Ta)-B; Fe-Co-Ln-B (Ln is a lanthanide rare earth element); Fe-(Co,Ni)-(Si,B)-(Nb,Zr,Ta); Fe-(RE,Nb, Zr)-B (RE is a rare ear...

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Problems solved by technology

[0005] The ternary Fe-B-Si amorphous alloy is currently the mainstream commercial amorphous soft magnetic alloy, and the alloy component with the largest amorphous forming ability in this system is Fe 75 B 15 Si 10 , but only an amorphous thin ribbon with a thickness of about 250 μm can be formed at the maximum through the high cooling rate stripping process

The saturation magnetization of commercial Fe-based amorphous alloy thin strips is usually between 1.5-1.6T, and the improvement of the amorphous formation ability of Fe-based amorphous alloys usually requires the addition of additional non-magnetic alloy elements, the increase of alloy components It will cause a decrease in the Fe content in the alloy, which is not conducive to the saturation magnetization of the amorphous alloy

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