A magnetic strap material having high strain shape memory effect and preparing method thereof

A memory effect, high-strain technology, applied in inductor/transformer/magnet manufacturing, inorganic material magnetic, electrical components, etc., can solve problems such as insufficiency, and achieve the effect of low cost and easy industrialized mass production

Inactive Publication Date: 2004-06-02
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that most shape memory alloys do not have ferromagnetic properties and cannot meet the needs of practical applications, thereby providing a thin strip m

Method used

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  • A magnetic strap material having high strain shape memory effect and preparing method thereof

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Embodiment 1

[0029] The preparation composition is: Ni 52 Fe 24 Ga 24 The magnetic alloy with the shape memory effect of high strain, the present invention is described in detail below in conjunction with preparation method:

[0030] The growth parameter is 245 kilohertz radio frequency heating, argon atmosphere protection, heating power is 15 kilowatts, and the preparation method is carried out according to the following specific steps:

[0031] (1) Weigh 2.767 grams of Ni42.767 grams, 18.783 grams of Fe18.783 grams and 23.449 grams of Ga with a purity of 99.9%, put them into a crucible, heat to 1200 ° C to melt, and keep for 10-30 minutes. The synthetic composition is Ni 52 Fe 24 Ga 24 The raw materials weigh 85 grams in total;

[0032] (2) Put 10-85 grams of the above-mentioned raw materials into a quartz tube with a diameter of 12 mm and a bottom opening of 0.5 mm, heat to melt with a radio frequency of 245 kilohertz, and under the protection of an argon atmosphere, the heating po...

Embodiment 2

[0037] The preparation composition is: Ni 53 Fe 22 Ga 25 A magnetic alloy with high strain shape memory effect; the difference is to use quartz with a diameter of 22 mm and a bottom opening of 0.5 mm. All the other are with embodiment 1. The phase transition temperature and Curie temperature are shown in Table 1. Measure the strain of its shape memory effect, obtain the shape as figure 1 The characteristic curve of the shape shown, and its shape memory strain value are shown in Table 2.

Embodiment 3

[0039] The preparation composition is: Ni 54 Fe 21 Ga 25 A magnetic alloy with a high-strain shape memory effect; the difference is that 100 grams of the above-mentioned raw materials are used and heated to melting with a radio frequency of 55 kHz, and the rest are the same as in Example 1. The phase transition temperature and Curie temperature are shown in Table 1. Measure the strain of its shape memory effect, obtain the shape as figure 1 The characteristic curve of the shape shown, and its shape memory strain value are shown in Table 2.

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Abstract

The invention relates to a magnetic material having high strain shape memory effect and process for making it, wherein the process for preparing comprises, melting the weighed material, preparing magnetic material using the conventional fast quench method with the preparation condition being, heating NiFeGa raw material to molten state, under the molten environment, ejecting argon of 1.0-1.50 barometric pressure to the copper wheel surface rotating at thread speed of 1-50 m/s, realizing 5-2000 m/s quick cooling down and acquiring fast quench thin belts. The starting temperature of the martensitic phase transformation of the material can be chosen to be in the range of between 120K-350K according to the need or the application. The material possesses better tenacity because of its iron content.

Description

technical field [0001] The invention relates to a shape memory material, in particular to a NiFeGa magnetic material with high strain shape memory effect and a preparation method thereof. Background technique [0002] Common shape memory alloys have a crystal structure (hereinafter referred to as the parent phase) at a relatively high temperature, and spontaneously change into another crystal structure at a relatively low temperature, generally called a martensitic phase. When cooling from a higher temperature to a lower temperature, the material transforms from the parent phase to the martensitic phase, which is called a martensitic transformation. Conversely, by heating the material from relatively low temperatures, the alloy undergoes a transformation from the martensitic phase to the parent phase, and this opposite phase transformation is called reverse martensitic transformation. Generally, the starting point of martensitic transformation is called M s point. [0003...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C38/00H01F1/04H01F41/02
Inventor 张铭崔玉亭柳祝红王文洪陈京兰吴光恒
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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