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Preparing method for high-strength and high-plasticity Ni50Mn34In16-xCox magnetic memory alloy

A ni50mn34in16-xcox, magnetic memory technology, used in metal processing equipment, transportation and packaging, etc., can solve the problems of large brittleness of shape memory alloys and high threshold value of driving magnetic field, and achieve high strength, excellent magnetic properties, and high fracture strength. and the effect of fracture strain

Active Publication Date: 2017-09-08
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of the existing Ni-Mn-In-Co series shape memory alloys with high brittleness and high driving magnetic field threshold, the present invention provides a method for preparing Ni by combining metal injection molding and sintering processes. 50 mn 34 In 16-x co x (x=2,3,4,5) method of magnetic memory alloy

Method used

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  • Preparing method for high-strength and high-plasticity Ni50Mn34In16-xCox magnetic memory alloy
  • Preparing method for high-strength and high-plasticity Ni50Mn34In16-xCox magnetic memory alloy
  • Preparing method for high-strength and high-plasticity Ni50Mn34In16-xCox magnetic memory alloy

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Embodiment 1

[0020] High strength, high plasticity Ni 50 mn 34 In 14 co 2 The magnetic memory alloy is prepared according to the following method: 50 parts of Ni powder with a particle size of 300 mesh, 34 parts of Mn powder, 14 parts of In powder and 2 parts of Co powder are mixed according to the atomic percentage, and stirred in a stirrer at a speed of 200 rpm Metal powder, make it evenly mixed, then add 2wt% binder (m epoxy resin: m polyamide = 4:1) of the total mass of the metal powder to make it fully mixed, and then add the above mixture to the metal injection molding machine In the process, the binder is melted by heating to 200°C to drive the metal powder into the mold cavity, and the injection embryo is obtained after applying a pressure of 20-40 kg to the mold / 10h-48h, and finally degreased, and finally used 1500 ℃-1700℃, pressure of 200-400 kg, vacuum degree of 10 -3 -10 -4 MPa, the time is 20-40 minutes sintering process sintering, and finally get Ni with a particle size ...

Embodiment 2

[0022] High strength, high plasticity Ni50 mn 34 In 13 co 3 The magnetic memory alloy is prepared according to the following method: 50 parts of Ni powder with a particle size of 300 mesh, 34 parts of Mn powder, 13 parts of In powder and 3 parts of Co powder are mixed according to the atomic percentage, and stirred at a speed of 200 rpm in a stirrer Metal powder, make it evenly mixed, then add 2wt% binder (m epoxy resin: m polyamide = 4:1) of the total mass of the metal powder to make it fully mixed, and then add the above mixture to the metal injection molding machine In the process, the binder is melted by heating to 200°C to drive the metal powder into the mold cavity, and the injection embryo is obtained after applying a pressure of 20-40 kg to the mold / 10h-48h, and finally degreased, and finally used 1500 ℃-1700℃, pressure of 200-400 kg, vacuum degree of 10 -3 -10 -4 MPa, the time is 20-40 minutes sintering process sintering, and finally get Ni with a particle size of...

Embodiment 3

[0024] High strength, high plasticity Ni 50 mn 34 In 12 co 4 The magnetic memory alloy is prepared according to the following method: 50 parts of Ni powder with a particle size of 300 mesh, 34 parts of Mn powder, 12 parts of In powder and 4 parts of Co powder are mixed according to the atomic percentage, and stirred at a speed of 200 rpm in a stirrer Metal powder, make it evenly mixed, then add 2wt% binder (m epoxy resin: m polyamide = 4:1) of the total mass of the metal powder to make it fully mixed, and then add the above mixture to the metal injection molding machine In the process, the binder is melted by heating to 200°C to drive the metal powder into the mold cavity, and the injection embryo is obtained after applying a pressure of 20-40 kg to the mold / 10h-48h, and finally degreased, and finally used 1500 ℃-1700℃, pressure of 200-400 kg, vacuum degree of 10 -3 -10 -4 MPa, the time is 20-40 minutes sintering process sintering, and finally get Ni with a particle size ...

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Abstract

The invention relates to a preparing method of a magnetic shape memory alloy, in particular to a preparing method for a high-strength and high-plasticity Ni50Mn34In16-xCox magnetic memory alloy. Materials are taken according to the atomic percent, and mixing, forming, degreasing and sintering are carried out to obtain high-strength and high-plasticity Ni50Mn34In16-xCox (x is equal to 2,3,4,5). The prepared magnetic shape memory alloy Ni50Mn34In16-xCox (x is equal to 2,3,4,5) has the beneficial effects of being good in toughness, high in strength, thin and small in texture and the like. The method expands a thought for application of the high-temperature and high-plasticity shape memory alloy.

Description

technical field [0001] The invention relates to a high-strength, high-plastic Ni 50 mn 34 In 16-x co x A method for preparing a magnetic memory alloy. Background technique [0002] In 1996, Ullakko et al. 2 A reversible strain of about 0.2% was obtained in MnGa single crystal, which opened the prelude to the research of magnetically driven memory alloys, and has become a research hotspot in the field of shape memory alloys. The currently widely studied magnetic drive memory alloys mainly include: Ni-Mn-Ga(Al), Ni-Fe-Ga, Co-Ni-Ga(Al) and new Ni-Mn-In(Sn, Sb) alloys. Ni-Mn-Ga-based alloy is the earliest discovered and most widely studied magnetic shape memory alloy. Its magnetically induced strain comes from the macroscopic strain caused by the rearrangement of martensitic twin crystal variants under the action of an external magnetic field. It has such a deformation mechanism. The key to obtaining large magnetically induced strain in the alloy is to have high magnetocry...

Claims

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Application Information

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IPC IPC(8): C22C1/04B22F3/115B22F1/00
CPCC22C1/0433B22F3/115B22F1/103B22F1/10
Inventor 董桂馥张倩倩陈建国
Owner DALIAN UNIV
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