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Magnesium-series magnetic shape memory alloy and obtaining method thereof

A memory alloy and magnetic technology, which is applied in the field of magnesium-based magnetic shape memory alloy and its acquisition, can solve the problems of high alloy density and limited lightweight application, and achieve the effects of low cost, short cycle and high accuracy

Active Publication Date: 2018-09-21
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned alloys have relatively high densities (8-10g / cm 3 ), limiting their lightweight application

Method used

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  • Magnesium-series magnetic shape memory alloy and obtaining method thereof
  • Magnesium-series magnetic shape memory alloy and obtaining method thereof
  • Magnesium-series magnetic shape memory alloy and obtaining method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1 A kind of chemical formula is Mg 2 Magnesium Magnetic Shape Memory Alloy Based on TiAl

[0067] The computer simulation calculation based on the first principle calculation method is used to obtain the target material, and the specific steps are as follows:

[0068] 1) Calculate the ground state energy of Mg, Ti, Al atoms;

[0069] 2) Build the initial structure model, including Heusler structure and anti-Heusler structure, and different magnetic configurations;

[0070] 3) carry out structure optimization to step 2) described model, obtain Mg 2 The total energy of different structures and magnetism of TiAl;

[0071] 4) by step 2) and step 3) obtain Mg 2 The binding energy of different structures and magnetism of TiAl can be used to obtain the cubic austenite phase, that is, the anti-Heusler structure and ferromagnetic configuration;

[0072] 5) Carry out tetragonal deformation calculation for cubic austenite phase;

[0073] 6) Calculate the phase ela...

Embodiment 2

[0079] Embodiment 2 A kind of chemical formula is Mg 2 Magnesium Magnetic Shape Memory Alloys Based on TiGa

[0080] Through the steps similar to those in Example 1, the target material was obtained based on first-principle calculations. The structural parameters of the magnesium-based magnetic shape memory alloy of this embodiment are:

[0081]

Embodiment 3

[0082] Embodiment 3 A kind of chemical formula is Mg 2 Magnesium Magnetic Shape Memory Alloys Based on TiIn

[0083] Through the steps similar to those in Example 1, the target material was obtained based on first-principle calculations. The structural parameters of the magnesium-based magnetic shape memory alloy of this embodiment are:

[0084]

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Abstract

The invention discloses magnesium-series magnetic shape memory alloy. The general formula of the magnesium-series magnetic shape memory alloy is Mg2YZ, Y is Ti or V, and Z is Al or Ga or In. The invention further discloses a method for predicting the structure and the property of the magnesium-series magnetic shape memory alloy. The method basically comprises the steps of A, calculating binding energy of a stoichiometric ratio system, pre-judging the existing probability of materials, and determining an initial cubic austenite structure and magnetic configuration; B, studying probable martensite phase transformation through cubic deformation; C, calculating the elastic constant and the phonon spectrum, and judging the stability. According to the magnesium-series magnetic shape memory alloy, a first-principle calculation method is adopted for studying the structure and the property of the magnesium-series alloy material from the scale of atoms, and the light alloy with the magnetic shape memory effect is discovered on the basis of thoroughly understanding the microcosmic essence of the alloy. The magnesium-series magnetic shape memory alloy has the advantages of being low in cost, short in period, good in repeatability and high in accuracy.

Description

technical field [0001] The invention belongs to the intersection field of computers and materials, and in particular relates to a magnesium-based magnetic shape memory alloy and a method for obtaining the same. Background technique [0002] Shape memory alloys are a class of materials with shape memory properties and superelasticity, and their shape memory properties are realized microscopically through the mutual transformation of crystal phase structures. Magnetic shape memory alloys have both the advantages of large strain of traditional shape memory alloys and fast response of magnetostrictive materials, so they have attracted wide attention. In the prior art, common magnetic shape memory alloys are mostly Ni-based, Co-based, and Fe-based. [0003] Ni-based magnetic shape memory alloys mainly include Ni-Mn-Ga, Ni-Mn-A1, Ni-Fe-Ga, Ni-Mn-In, Ni-Mn-Sn, Ni-Mn-Sb, etc., all of which belong to the L21 type Heusler alloy family. Its high-temperature austenite phase is a face...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00C22C23/00
CPCC22C23/00G16C20/20G16C20/30
Inventor 彭文屹江长双刘聪朱峰袁林
Owner NANCHANG UNIV
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