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Rare earth magnetic material with magnetic field controlled deformation and preparation method thereof

A magnetic material and rare earth technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problem of low memory recovery rate of alloys, achieve large magnetic strain, wide temperature range of magnetic strain, high magnetic strain Effect of Strain Temperature Range

Active Publication Date: 2016-07-13
BAOTOU INST MAGNETIC NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the nickel-cobalt-aluminum alloy system, the lower saturation magnetization and magnetocrystalline anisotropy lead to a lower recovery rate of the alloy's magnetically controlled shape memory, so it is expected to develop a new type of magnetically controlled shape memory with good magnetic properties alloy to realize its industrial promotion and application

Method used

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  • Rare earth magnetic material with magnetic field controlled deformation and preparation method thereof
  • Rare earth magnetic material with magnetic field controlled deformation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition of the preparation is Co 31 Ni 29 Al 33 Tb 7 The shape memory alloy with magnetic field controllable deformation, its preparation method is as follows:

[0026] (1) Weighing Co, Ni, Al, Tb with a purity of 99.9% respectively;

[0027] (2) Put the weighed raw materials in the crucible, and use vacuum melting. The melting conditions are: a.1×10 -2 MPa vacuum state; b. The melting temperature is 1400°C; c. The melting process uses magnetic stirring; d. The melting time is 0.3 hours.

[0028] (3) Carry out vacuum magnetic field heat treatment to the above-mentioned smelted alloy ingot, the treatment conditions are: temperature 650 ℃; time: 18 hours; vacuum degree: 1×10 -3 Mpa; Applied magnetic field strength: 5×10 7 A·m -1 .

[0029] (4) Then cool with the furnace, the cooling rate range is: 0.01°C / s; the magnetic field reduction rate is: 1000A m -1 ·s -1 ; Cool to room temperature and take out to obtain the final shape memory alloy.

[0030] The ...

Embodiment 2

[0032] The composition of the preparation is Co 45 Ni 20 Al 34.5 Tb 0.5 The shape memory alloy with magnetic field controllable deformation, its preparation method is as follows:

[0033] (1) Weighing Co, Ni, Al, Tb with a purity of 99.9% respectively;

[0034] (2) Put the weighed raw materials in the crucible, and use vacuum melting, the melting conditions are: a.7×10 -3 MPa vacuum state; b. The melting temperature is 1500°C; c. The melting process uses magnetic stirring; d. The melting time is 0.25 hours.

[0035] (3) Carry out vacuum magnetic field heat treatment to the above-mentioned smelted alloy ingot, the treatment conditions are: temperature 600°C; time: 24 hours; vacuum degree: 6×10 -3 Mpa; Applied magnetic field strength: 1×10 7 A·m -1 .

[0036] (4) Then cool with the furnace, the cooling rate range is: 0.3°C / s; the magnetic field reduction rate is: 5000A m -1 ·s -1 ; Cool to room temperature and take out to obtain the final shape memory alloy.

[0037] ...

Embodiment 3

[0039] The composition of the preparation is Co 27 Ni 31 Al 34 Tb 8 The shape memory alloy with magnetic field controllable deformation, its preparation method is as follows:

[0040] (1) Weighing Co, Ni, Al, Tb with a purity of 99.9% respectively;

[0041] (2) Put the weighed raw materials in the crucible, and use vacuum melting. The melting conditions are: a.1×10 -3 MPa vacuum state; b. The melting temperature is 1550°C; c. The melting process uses magnetic stirring; d. The melting time is 0.2 hours.

[0042] (3) Carry out vacuum magnetic field heat treatment to the above-mentioned smelted alloy ingot, the treatment conditions are: temperature 550°C; time: 36 hours; vacuum degree: 1×10 -3 Mpa; Applied magnetic field strength: 5×10 7 A·m -1 .

[0043] (4) Then cool with the furnace, the cooling rate range is: 1°C / s; the magnetic field reduction rate is: 10000A m -1 ·s -1 ; Cool to room temperature and take out to obtain the final shape memory alloy.

[0044] The po...

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Abstract

The invention provides a rare earth magnetic material with magnetic field controlled deformation and a preparation method thereof, and belongs to the field of shape memory materials.The material has the ability of producing micro deformation under the control of an external magnetic field at indoor temperature or higher temperature.The rare earth magnetic material is the novel rare earth magnetic control shape memory alloy capable of producing stress when martensite twin boundaries are driven by external magnetic field changes at indoor temperature or higher temperature.The chemical formula of the alloy is CoxNiyALzTbj, wherein x is larger than or equal to 27 and is smaller than or equal to 45, y is larger than or equal to 20 and is smaller than or equal to 31, z is larger than or equal to 20 and is smaller than or equal to 34, j is larger than or equal to 0.5 and is smaller than or equal to 8, the sum of x, y, z and j is 100, and x, y, z and j represent mole percentage content.Compared with existing materials, the rare earth magnetic material has the wide field-induced strain range, large field-induced strain and good mechanical property, and has the important application in the fields of micro displacement devices, vibration and noise control, linear motors, microwave devices, robots and the like capable of being used at the temperature higher than indoor temperature.

Description

technical field [0001] The invention belongs to the field of shape memory materials, and relates to a rare earth magnetic material with controllable deformation of a magnetic field and a preparation method thereof. Background technique [0002] In recent years, magnetically controlled shape memory alloys have great potential application value in the field of high-sensitivity magnetic brakes and sensors due to their fast response frequency and large magnetically induced strain. [0003] At present, the research on magnetically controlled shape memory alloys mainly focuses on several systems, such as nickel-manganese-gallium alloy, cobalt-nickel-gallium alloy, nickel-aluminum-fluorine alloy, nickel-manganese-aluminum alloy and nickel-cobalt-aluminum alloy. Compared with other magnetron memory alloys, nickel-cobalt-aluminum alloys have many advantages, such as good ductility, large magnetic anisotropy and low production cost. [0004] Generally, the microstructure of nickel-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C19/07C22C1/02C22F1/02H01F1/03
CPCC22C1/02C22C19/07C22C30/00C22F1/02H01F1/0308
Inventor 巨佳巴志新杨柳袁健黄家喜王兴怡印邵胜许永祥
Owner BAOTOU INST MAGNETIC NEW MATERIALS CO LTD
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