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Method for improving soft magnetic properties of bulk amorphous alloy Fe-M-B

An amorphous alloy, fe-m-b technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of soft magnetic amorphous annealing, etc., to reduce the coercive force of the alloy, increase the saturation magnetic induction intensity, and improve the soft magnetic Can effect

Active Publication Date: 2012-04-25
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the field of high magnetic field research, it has been pointed out that increasing the magnetic field strength can affect the formation of precipitated phases, inhibit or promote the formation of precipitated products, but there is no research on the annealing of this series of soft magnetic amorphous materials using high-intensity magnetic fields.

Method used

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  • Method for improving soft magnetic properties of bulk amorphous alloy Fe-M-B
  • Method for improving soft magnetic properties of bulk amorphous alloy Fe-M-B
  • Method for improving soft magnetic properties of bulk amorphous alloy Fe-M-B

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Formulated Fe in proportion 71 (Nb 0.8 Zr 0.2 ) 6 B 23 Alloy raw materials, that is, by atomic percentage, Fe content 71at%, B content 23at%, Nb4.8at%, Zr1.2at%, using vacuum arc melting at 10 -3 Preparation of Fe at Pa 71 (Nb 0.8 Zr 0.2 ) 6 B 23 master alloy, and then adopt copper mold suction casting to prepare bulk amorphous alloy Fe 71 (Nb 0.8 Zr 0.2 ) 6 B 23 , to obtain Fe with a diameter of 1 mm 71 (Nb 0.8 Zr 0.2 ) 6 B23 Round rod, take its cross section for X-ray diffraction, its diffraction pattern is a typical amorphous diffuse scattering peak, indicating that the round rod is a completely amorphous structure, the Fe 71 (Nb 0.8 Zr 0.2 ) 6 B 23 Differential thermal analysis of bulk amorphous alloys can calibrate their glass transition temperature T g 555°C, the initial temperature of crystallization T x It is 598°C.

[0026] Take the Fe 71 (Nb 0.8 Zr 0.2 ) 6 B 23 The bulk amorphous alloy is placed in a strong magnetic field vacuum...

Embodiment 2

[0030] Prepare bulk amorphous alloy Fe by batching, vacuum arc melting and copper mold suction casting according to Example 1 71 (Nb 0.8 Zr 0.2 ) 6 B 23 , the alloy was placed in a high magnetic field vacuum heat treatment furnace, and kept at 550°C for 10 minutes. During the heat preservation process, a 3T strong magnetic field was applied, and the coercive force of the alloy dropped rapidly to 20A / m, while the saturation magnetic induction increased from the original state of the alloy to 113 ±1emu / g increased to 128.7±1emu / g.

Embodiment 3

[0032] Prepare bulk amorphous alloy Fe by batching, vacuum arc melting and copper mold suction casting according to Example 1 71 (Nb 0.8 Zr 0.2 ) 6 B 23 , the alloy is placed in a high magnetic field vacuum heat treatment furnace, and kept at 600°C for 10 minutes. During the heat preservation process, a 20T strong magnetic field is applied, and the coercive force of the alloy drops to H c =9.8A / m, the saturation magnetic induction is significantly higher than that of the initial alloy, which is 145.7±1emu / g.

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Abstract

The invention belongs to the field of functional materials, and particularly relates to a method for improving the soft magnetic properties of bulk amorphous alloy Fe-M-B. The method comprises the following steps of: under vacuum conditions, heating the amorphous alloy Fe-M-B to an interval between a glass transition temperature (Tg-20) DEG C and a crystallization starting temperature (Tx+20) DEGC; insulating for 10-60 minutes; simultaneously applying a magnetic field of 3-20T in heating and insulating processes; after insulating, air-cooling to room temperature; and removing the magnetic field to obtain the bulk amorphous alloy Fe-M-B of which the saturation induction density is less than or equal to 145.7emu / g and the coercive force is less than or equal to 30A / m. The method provided by the invention effectively improves the soft magnetic properties of the alloy Fe-M-B under the condition that the alloy forming size is not reduced, thereby being favorable for developing amorphous nanocrystalline alloy with excellent properties.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a method for improving the soft magnetic properties of bulk amorphous alloy Fe-M-B. Background technique [0002] Magnetic materials have the functions of converting, storing and changing energy, and are important functional materials. Among them, soft magnetic materials account for the largest proportion of magnetic materials. In addition to being the key materials of motors, generators and transformers, they are also used in electrical equipment and electronic equipment. It is also widely used in magnetic circuits and components. The application of soft magnetic materials in industry began at the end of the 19th century. It was the first to use low-carbon steel to manufacture motors and transformers. Fine iron powder, iron oxide and fine iron wire were used in the magnetic core of the inductance coil of the telephone line. Soft magnetic materials are manufactured Most of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02H01F1/153
Inventor 贾鹏王恩刚左小伟张林
Owner NORTHEASTERN UNIV
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