Preparation method of superplastic Ni-Mn-Ga-Ta high-temperature memory alloy

A memory alloy and superplastic technology, which is applied in the field of high-temperature superplastic Ni-Mn-Ga-Ta memory alloy preparation, can solve the problems of high brittleness and low restoring force of memory alloys.

Active Publication Date: 2017-11-14
DALIAN UNIV
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Problems solved by technology

[0003] In order to solve the problems of high brittleness and low resilience of the existing Ni-Mn-Ga series shape memory alloys, a rare element Ta is doped into the alloy to provide a high-temperature superplastic Ni 53 mn 25 Ga 21 Ta 1 Memory alloy preparation method

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  • Preparation method of superplastic Ni-Mn-Ga-Ta high-temperature memory alloy
  • Preparation method of superplastic Ni-Mn-Ga-Ta high-temperature memory alloy
  • Preparation method of superplastic Ni-Mn-Ga-Ta high-temperature memory alloy

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Embodiment 1

[0019] The high temperature superplastic Ni of this embodiment 53 mn 25 Ga 21 Ta 1 The preparation method of the memory alloy is prepared according to the following method: according to the atomic percentage, 53 parts of Ni, 25 parts of Mn, 21 parts of Ga and 0.5 parts of rare element Ta are put into a vacuum intermediate frequency induction melting furnace, and the order is as follows Place raw materials: first place the rare element Ta, then Ni, and finally Ga. Due to the high volatility of Mn element, when feeding, put the Mn sheet in the feeding device of the vacuum intermediate frequency induction melting furnace for standby, and close the side furnace door. Before smelting, vacuumize to 6.67×10 with mechanical pump and Roots pump -3 Pa, then filled with high-purity argon to 0.5Pa. Start smelting and control the smelting power to 450Kw. Due to the melting principle of the intermediate frequency induction itself, the melted metal liquid will flow and stir under the ac...

Embodiment 2

[0021] The high temperature superplastic Ni of this embodiment 53 mn 25 Ga 21 Ta 1 The preparation method of the memory alloy is prepared according to the following method: according to the atomic percentage, 53 parts of Ni, 25 parts of Mn, 21 parts of Ga and 0.5 parts of rare element Ta are put into a vacuum intermediate frequency induction melting furnace, and the order is as follows Place the raw materials: first place the rare element Ta, then Ni, and finally Ga, put the Mn sheet in the feeding device of the vacuum intermediate frequency induction melting furnace for standby, and close the side furnace door. Before smelting, vacuumize to 6.67×10 with mechanical pump and Roots pump -3 Pa, then filled with high-purity nitrogen to 0.5Pa. Start smelting and control the smelting power to 450Kw. Due to the melting principle of the intermediate frequency induction itself, the melted metal liquid will flow and stir under the action of the electromagnetic field. When the melt...

Embodiment 3

[0023] The high temperature superplastic Ni of this embodiment 53 mn 25 Ga 21 Ta 1 The preparation method of the memory alloy is prepared according to the following method: according to the atomic percentage, 53 parts of Ni, 25 parts of Mn, 21 parts of Ga and 0.5 parts of rare element Ta are put into a vacuum intermediate frequency induction melting furnace, and the order is as follows Place the raw materials: first place the rare element Ta, then Ni, and finally Ga, put the Mn sheet in the feeding device of the vacuum intermediate frequency induction melting furnace for standby, and close the side furnace door. Before smelting, vacuumize to 6.67×10 with mechanical pump and Roots pump -3 Pa, then filled with high-purity argon to 0.5Pa. Start smelting, control the smelting power to 500Kw, and arc smelting for 8-12 minutes. Due to the melting principle of the intermediate frequency induction itself, the melted metal liquid will flow and stir under the action of the electrom...

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Abstract

The invention relates to a preparation method of a high-temperature memory alloy, in particular to a preparation method of a superplastic Ni-Mn-Ga-Ta high-temperature memory alloy. According to the method, the high-temperature superplastic Ni53Mn25Ga21Ta1 alloy is obtained by material taking, vacuumizing, smelting, adding of an Mn element for continuous smelting, cleaning, heat insulation and quenching in water. The Ni53Mn25Ga21Ta1 alloy prepared through the preparation method has the advantages of high toughness, high intensity, high phase change temperature and the like, and a new idea is expanded for application of high-temperature and high-plasticity shape memory alloys.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature superplastic Ni-Mn-Ga-Ta memory alloy. Background technique [0002] Ni-Mn-Ga shape memory alloy is a new type of intelligent ferromagnetic shape memory material, which has both thermoelastic martensitic phase transformation and ferromagnetic transformation. It not only has the shape memory effect of traditional shape memory alloys controlled by temperature field, but also The shape memory effect can be produced under the action of a magnetic field. The response frequency of its magnetically controlled shape memory effect is close to that of piezoelectric ceramics, and the output strain is close to that of traditional temperature-controlled shape memory alloys. It is a smart material with great engineering application prospects. Because of its unique characteristics, it can also be widely used in drivers and sensors. However, Ni-Mn-Ga bulk materials still have disadvantages such as hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22F1/10
CPCC22C1/023C22F1/002C22F1/006C22F1/10
Inventor 董桂馥陈建国贾卫平王珍
Owner DALIAN UNIV
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