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A nickel-manganese-gallium alloy with high elastothermal effect and preparation method thereof

A technology of nickel-manganese-gallium and thermal effect, which is applied in the field of nickel-manganese-gallium alloy and its preparation, can solve the problems of gas refrigerant environmental pollution, etc., and achieve the effect of high adiabatic temperature change, reversibility, and easy stress-induced phase change device

Active Publication Date: 2018-03-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the current use of gas refrigerants will pollute the environment, and provides a nickel-manganese-gallium alloy with high elastothermal effect and a preparation method thereof

Method used

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  • A nickel-manganese-gallium alloy with high elastothermal effect and preparation method thereof
  • A nickel-manganese-gallium alloy with high elastothermal effect and preparation method thereof
  • A nickel-manganese-gallium alloy with high elastothermal effect and preparation method thereof

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specific Embodiment approach 1

[0028] Specific implementation mode 1: a nickel-manganese-gallium alloy with high elastothermal effect described in this implementation mode is made of 48%-50% nickel, 29%-31% manganese and 21%-23% gallium; The compressive strength of nickel-manganese-gallium alloy with high elastothermal effect is greater than 600MPa, and the crystal grains are columnar crystals with orientation.

[0029] The beneficial effects of this embodiment are: this embodiment relates to a preparation method for nickel-manganese-gallium alloy to obtain high elastothermal effect, and nickel-manganese-gallium alloy is a typical ferromagnetic shape memory alloy. Using stress-induced martensitic phase transformation to generate elastothermal effect not only has high adiabatic temperature change and reversibility, but also makes it easy to prepare a stress-induced phase transition device. Therefore, using the elastothermal effect of the nickel-manganese-gallium alloy of this embodiment to prepare a refrige...

specific Embodiment approach 2

[0031] Specific embodiment two: the preparation method of a nickel-manganese-gallium alloy with high elastothermal effect described in this embodiment is completed according to the following steps:

[0032] 1. Weighing:

[0033] Weigh three pure metals of pure nickel, pure manganese and pure gallium respectively according to the atomic percentage of 48% to 50% nickel, 29% to 31% manganese and 21% to 23% gallium;

[0034] 2. Making the casting mold:

[0035] Using graphite to prepare a casting mold to obtain a graphite mold with an inner cavity length greater than 100 mm, a width greater than 50 mm, and a thickness of 15 mm to 30 mm;

[0036] 3. Vacuum induction melting method:

[0037] 1. Place the pure nickel, pure manganese and pure gallium weighed in step 1 in a vacuum induction melting furnace;

[0038] ②. First vacuumize the smelting chamber, the vacuum degree is not lower than 1Pa, and then introduce argon gas of 0.01MPa ~ 0.05MPa;

[0039] ③. Repeat step 3 ②3 to 5 t...

specific Embodiment approach 3

[0048] Specific embodiment three: the difference between this embodiment and specific embodiment two is that in step one, three pure metals of pure nickel, pure manganese and pure gallium are respectively weighed according to the atomic percentage of 48% nickel, 31% manganese and 21% gallium . Others are the same as in the second embodiment.

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Abstract

The invention discloses a nickel-manganese-gallium alloy with a high elastic thermal effect and a preparation method thereof, and relates to the nickel-manganese-gallium alloy and the preparation method thereof. In order to solve the problem that an existing gas refrigerant causes pollution on environment. The preparation method comprises the following steps of: I, weighing; II, manufacturing a casting mould; III, performing a vacuum induction smelting method; IV, performing uniform thermal treatment; and IV, performing ordering treatment. The nickel-manganese-gallium alloy and the preparation method have the advantages that: martensite phase transformation is induced by stress to generate the elastic thermal effect, adiabatic temperature change and reversibility are high, and a stress-induced phase transformation device is easily manufactured. The manufacturing method for a refrigerating device by the elastic thermal effect of the nickel-manganese-gallium alloy has a good prospect. The invention provides the nickel-manganese-gallium alloy with the high elastic thermal effect and the preparation method thereof.

Description

technical field [0001] The invention relates to a nickel-manganese-gallium alloy and a preparation method thereof. Background technique [0002] Commercially available refrigerators currently use vapor compression refrigerants for refrigeration. Commonly used refrigerants are Freon, hydrocarbons, ammonia, etc. These refrigeration materials are compressed and liquefied, and the high-temperature expansion process achieves the purpose of refrigeration. However, due to the low efficiency of gas refrigerants in the working process, and the inevitable leakage will cause the destruction of the ozone layer and the aggravation of the greenhouse effect, these problems make people urgently need to find new refrigerants. Therefore, it is proposed to find solid refrigerants instead of gas refrigerants to solve the problem of environmental pollution. Among the solid-state refrigeration materials, ferrous materials have the characteristics of no pollution and high efficiency, and have a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/10H01F1/01
CPCC22C1/023C22C19/005C22C19/03C22C30/00C22F1/10H01F1/015
Inventor 张学习魏陇沙耿林
Owner HARBIN INST OF TECH
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