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Preparation method of high-corrosion-resistance NiMnInCo magnetic shape memory alloy

A technology of memory alloy and high corrosion resistance, which is applied in the field of smart materials and magnetic shape memory alloy corrosion resistance, can solve the problem of low corrosion resistance of magnetic memory alloy, and achieve the effect of large output strain and high output stress

Active Publication Date: 2018-12-07
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of low corrosion resistance of the existing NiMnInCo series magnetic memory alloys, the present invention provides a preparation method of high corrosion resistance NiMnInCo magnetic shape memory alloys. The present invention uses combustion reaction high temperature synthesis of NiMnInCo magnetic shape memory alloys for the first time, and plans to develop NiMnInCo nanocrystalline alloy with large magnetically controlled two-way shape memory effect to achieve fast response, large output strain, and high output stress to meet the requirements of multiple reciprocating motion smart structures for high-performance driving materials

Method used

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  • Preparation method of high-corrosion-resistance NiMnInCo magnetic shape memory alloy

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Embodiment 1

[0022] The preparation method of high wear resistance NiMnInCo magnetic shape memory alloy is prepared according to the following steps: according to the atomic percentage, 45 parts of Ni powder, 34 parts of Mn powder, 16 parts of In powder and 5 parts of Co powder are mixed with a particle size of 5 microns , Stir the metal powder in the agitator at a speed of 200 rpm-500 rpm to make it evenly mixed, then pour it into a pressure forming mold, press the mold with a jack, and pressurize to 400- Press the powder into a cylindrical sample with a diameter of 10 mm and a height of 10 mm under a pressure of 1000 MPa and hold the pressure for 2-4 minutes, and finally sinter at a temperature of 1000 ° C and a holding time of 40 minutes to obtain a particle size of 20-30 microns. NiMnInCo Magnetic Shape Memory Alloy.

Embodiment 2

[0024] The preparation method of high wear resistance NiMnIn and NiMnInCo magnetic shape memory alloy is prepared according to the following steps: according to the atomic percentage, take 45 parts of Ni powder, 34 parts of Mn powder, 16 parts of In powder, and 5 parts of In powder with a particle size of 5 microns. Mix the Co powder, stir the metal powder in the agitator at a speed of 200 rpm-500 rpm to make it evenly mixed, then pour it into the pressure forming mold, press the mold with a jack, and pressurize to Under the pressure of 400-1000MPa and holding pressure for 2-4min, the powder is pressed into a cylindrical sample with a diameter of 10mm and a height of 10mm, and finally sintered at a temperature of 1100°C and a holding time of 30min to obtain a particle size of 20- 30 micron NiMnIn and NiMnInCo magnetic shape memory alloys.

Embodiment 3

[0026]The preparation method of high wear resistance NiMnIn and NiMnInCo magnetic shape memory alloy is prepared according to the following steps: according to the atomic percentage, take 45 parts of Ni powder, 34 parts of Mn powder, 16 parts of In powder, and 5 parts of In powder with a particle size of 5 microns. Mix the Co powder separately, stir the metal powder in the agitator at a speed of 200 rpm-500 rpm to make it evenly mixed, then pour it into a pressure forming mold, press the mold with a jack, and pass the pressure Press the powder into a cylindrical sample with a diameter of 10mm and a height of 10mm under a pressure of 400-1000MPa and hold the pressure for 2-4min, and finally sinter at a temperature of 1200°C and a holding time of 20min to obtain a particle size of 20 - 30 micron NiMnIn and NiMnInCo magnetic shape memory alloys.

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Abstract

The invention relates to a preparation method of a high-corrosion-resistance NiMnInCo magnetic shape memory alloy, and belongs to the technical field of corrosion resistance of intelligent materials and magnetic shape memory alloys. The preparation method of the high-corrosion-resistance NiMnInCo magnetic shape memory alloy comprises the following specific steps: materials are taken according to the atomic percents for uniform mixing and sintering to obtain the high-corrosion-resistance NiMnInCo alloy. The novel NiMnInCo magnetic shape memory alloy is synthesized by adopting a combustion reaction for the first time, so that the thought for application of the high-corrosion-resistance shape memory alloy is widened; and the prepared NiMnInCo magnetic shape memory alloy has the advantage of corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of intelligent materials and magnetic shape memory alloy corrosion resistance, and relates to a preparation method of high corrosion resistance NiMnInCo magnetic shape memory alloy. Background technique [0002] Smart materials are an important field of material research. At present, there are more researches on piezoelectric materials, magnetostrictive materials and shape memory alloys. Piezoelectric ceramics represented by PZT and magnetostrictive materials represented by Terfenol-D can Under the action of an applied electric field / magnetic field, it exhibits reversible strain, with a response frequency of 10KHz, but the maximum output strain is small (only about 0.2%), and the output stress is low (only a few MPa), while the traditional shape memory alloy represented by TiNi alloy Through thermomechanical training, it can have two-way shape memory effect, large output strain (4%), and high output force (t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C30/00
CPCB22F2998/10C22C1/0433C22C19/005C22C19/03C22C30/00C22C2202/02B22F1/0003B22F3/02B22F3/10
Inventor 董桂馥李超然王兴安
Owner DALIAN UNIV
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