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Preparation method for high strength Ni50Mn34In16 magnetic memory alloy

A ni50mn34in16, magnetic memory technology, applied in the field of magnetic memory alloys, can solve the problems of high driving magnetic field threshold and high brittleness of shape memory alloys, and achieve the effects of low driving magnetic field threshold, high fracture strength and small grain size

Active Publication Date: 2017-08-18
DALIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems that the existing Ni-Mn-In series shape memory alloys have 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 A method for magnetic memory alloys, which combines metal injection molding and sintering processes to achieve fine-grain strengthening, significantly changes the alloy phase transition temperature and improves its alloy mechanical properties and enhances magnetic properties

Method used

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  • Preparation method for high strength Ni50Mn34In16 magnetic memory alloy
  • Preparation method for high strength Ni50Mn34In16 magnetic memory alloy
  • Preparation method for high strength Ni50Mn34In16 magnetic memory alloy

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Embodiment 1

[0014] High strength Ni 50 mn 34 In 16 The magnetic memory alloy is prepared as follows: 50 parts of Ni powder with a particle size of 300 mesh, 34 parts of Mn powder, and 16 parts of In powder are mixed according to the atomic percentage, and the metal is stirred at a speed of 200 rpm in a stirrer. powder, make it evenly mixed, and then add 2% binder (m paraffin: m polyethylene: m oleic acid = 3:2:5) to make it fully mixed with metal powder, and then add the above raw materials to metal injection molding In the machine, the binder is melted by heating to 200°C to drive the metal powder into the mold cavity, and the injection mold is obtained after applying a pressure of 20-40 kg to the mold for 10h-48h, and finally degreased, and finally used 1500°C-1700°C, 200-400 kg pressure, vacuum degree of 10 -3 -10 - 4 Pa, the time is 20-40 minutes sintering process sintering, and finally get Ni with a particle size of about 50-60 microns 50 mn 34 In 16 magnetic memory alloy.

Embodiment 2

[0016] High strength Ni 50 mn 34 In 16 The magnetic memory alloy is prepared as follows: 50 parts of Ni powder with a particle size of 300 mesh, 34 parts of Mn powder, and 16 parts of In powder are mixed according to the atomic percentage, and the metal is stirred at a speed of 400 rpm in a stirrer. powder, make it evenly mixed, and then add 2% binder (m paraffin: m polyethylene: m oleic acid = 3:2:5) to make it fully mixed with metal powder, and then add the above raw materials to metal injection molding In the machine, the binder is melted by heating to 200°C to drive the metal powder into the mold cavity, and the injection mold is obtained after applying a pressure of 20-40 kg to the mold for 10h-48h, and finally degreased, and finally used 1500°C-1700°C, 200-400 kg pressure, vacuum degree of 10 -3 -10 - 4 Pa, the time is 20-40 minutes sintering process sintering, and finally get Ni with a particle size of about 50-60 microns 50 mn 34 In 16 magnetic memory alloy.

Embodiment 3

[0018] High strength Ni 50 mn 34 In 16 The magnetic memory alloy is prepared as follows: 50 parts of Ni powder with a particle size of 300 mesh, 34 parts of Mn powder, and 16 parts of In powder are mixed according to the atomic percentage, and the metal is stirred at a speed of 200 rpm in a stirrer. powder, make it evenly mixed, and then add 2% binder (m paraffin: m polyethylene: m oleic acid = 3:2:5) to make it fully mixed with metal powder, and then add the above raw materials to metal injection molding In the machine, the binder is melted by heating to 400°C to drive the metal powder into the mold cavity, and the injection mold is obtained after applying a pressure of 20-40 kg / 10h-48h to the mold, and finally degreased, and finally used 1500°C-1700°C, 200-400 kg pressure, vacuum degree of 10 -3 -10- 4 Pa, the time is 20-40 minutes sintering process sintering, and finally get Ni with a particle size of about 50-60 microns 50 mn 34 In 16 magnetic memory alloy.

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Abstract

The invention relates to a preparation method for a magnetic shape memory alloy, in particular to a preparation method for a high strength Ni50Mn34In16 magnetic memory alloy. The high strength Ni50Mn34In16 is prepared according to the following steps of material taking according to the atomic percent, mixing, forming, degreasing and sintering, and then the high strength Ni50Mn34In16 is obtained. The Ni50Mn34In16 alloy prepared by the method has higher fracture strength and fracture strain, the grain size of the magnetic shape memory alloy is tiny so as to drive the threshold value of a magnetic field to be reduced, the excellent magnetic property is achieved, and the train of thought is expanded for application of the high temperature and high plasticity shape memory alloy.

Description

technical field [0001] The invention belongs to the field of magnetic memory alloys, in particular to a high-strength Ni 50 mn 34 In 16 Preparation method of magnetic memory alloy. Background technique [0002] Shape memory alloy has become the most promising driving material because of its large reversible strain and response frequency, and its shape memory effect and superelastic behavior have been widely used. Conventional temperature-controlled shape memory alloys, such as TiNi-based, Cu-based, and Fe-based alloys, are limited in practical applications due to their low response frequencies driven by temperature fields. In addition to the general characteristics of traditional memory alloys, magnetically driven memory alloys can also output larger strains under the action of a magnetic field, which not only overcomes the shortcomings of being limited by the temperature field, but also changes the working frequency of memory alloys from 1Hz in the temperature-controlled...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/04B22F1/00B22F3/22
CPCC22C1/04C22C30/00B22F3/225C22C2202/02B22F1/103B22F1/10
Inventor 董桂馥王兴安王通赵益民
Owner DALIAN UNIV
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