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Ni-Mn-In-Co-Cu magnetic refrigeration alloy material and preparation method

An alloy material, ni-mn-in-co-cu technology, applied in the direction of magnetic materials, inorganic material magnetism, magnetic objects, etc., can solve the problem that the magnetocaloric effect cannot be applied in a wide range, and the phase transition temperature deviates from room temperature, etc. problem, to achieve the effect of abundant reserves, good performance stability and low price

Active Publication Date: 2018-02-09
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the phase transition temperature of most Ni-Mn-In series alloys will deviate from room temperature, and the magnetocaloric effect near room temperature cannot be applied in a wide range

Method used

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  • Ni-Mn-In-Co-Cu magnetic refrigeration alloy material and preparation method

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Experimental program
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Effect test

Embodiment 1

[0030] Ni-Mn-In-Co-Cu magnetic alloy, the sum of moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Mn:In:Co:Cu=46:36:14:3:1.

[0031] Ni 46 mn 36 In 14 co 3 Cu 1 The preparation method of magnetic alloy comprises the following steps:

[0032] (1) Raw material ratio: according to the molar ratio of Ni:Mn:In:Co:Cu=46:36:14:3:1;

[0033] (2) Preparation of polycrystalline ingots: the raw materials weighed in step (1) were placed in a water-cooled copper crucible of a vacuum arc melting furnace, and the cavity of the arc melting furnace was evacuated to 3×10 -3 ~5×10 -3 After Pa, pass in an inert protective gas of 0.05MPa, repeat smelting for 4 to 5 times, and conduct arc smelting under electromagnetic stirring to obtain a polycrystalline parent alloy with uniform composition;

[0034] (3) Heat treatment: Ni 46 mn 36 In 14 co 3 Cu 1 Alloy ingots were directly quenched in ice water after being kept at 1173K for 24h to obtain the Ni 4...

Embodiment 2

[0038] Ni-Mn-In-Co-Cu magnetic refrigeration alloy material, the sum of the moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Mn:In:Co:Cu=46:35:14:3:2 .

[0039] The preparation method of Ni-Mn-In-Co-Cu magnetic refrigeration alloy material comprises the following steps:

[0040] (1) Raw material ratio: according to the molar ratio batching of Ni:Mn:In:Co:Cu=46:35:14:3:2;

[0041] (2) Preparation of polycrystalline ingots: the raw materials weighed in step (1) were placed in a water-cooled copper crucible of a vacuum arc melting furnace, and the cavity of the arc melting furnace was evacuated to 3×10 -3 ~5×10 -3 After Pa, pass in an inert protective gas of 0.05MPa, repeat smelting for 4 to 5 times, and conduct arc smelting under electromagnetic stirring to obtain a polycrystalline parent alloy with uniform composition;

[0042] (3) Heat treatment: Ni 46 mn 35 In 14 co 3 Cu 2 Alloy ingots were directly quenched in ice water after bein...

Embodiment 3

[0046] Ni-Mn-In-Co-Cu magnetic refrigeration alloy material, the sum of the moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Mn:In:Co:Cu=46:34:14:3:3 .

[0047] Ni 46 mn 34 In 14 co 3 Cu 3 The preparation method of magnetic alloy comprises the following steps:

[0048] (1) Raw material ratio: according to the chemical formula Ni 46 mn 34 In 14 co 3 Cu 3 The molar ratio ingredients;

[0049] (2) Preparation of polycrystalline ingots: the raw materials weighed in step (1) were placed in a water-cooled copper crucible of a vacuum arc melting furnace, and the cavity of the arc melting furnace was evacuated to 3×10 -3 ~5×10 -3 After Pa, pass in an inert protective gas of 0.05MPa, repeat smelting for 4 to 5 times, and conduct arc smelting under electromagnetic stirring to obtain a polycrystalline parent alloy with uniform composition;

[0050] (3) Heat treatment: Ni 46 mn 34 In 14 co 3 Cu 3 Alloy ingots were directly quenched in...

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Abstract

The invention provides a Ni-Mn-In-Co-Cu magnetic refrigeration alloy material and a preparation method and belongs to the technical field of magnetic materials. The chemical molecular formula of the Ni-Mn-In-Co-Cu magnetic refrigeration alloy material is Ni46MnxIn14Co3Cuy, and the sum of the mole numbers of the elements in the alloy is 100, wherein 33<=x<=36, and 1<=y<=4. According to the Ni-Mn-In-Co-Cu magnetic refrigeration alloy material and the preparation method, through raw material proportioning and vacuum arc repeated smelting, polycrystal cast ingot is prepared, annealing is conductedunder the high-purity inert gas shielding, rapid water cooling is then conducted, and then the Ni-Mn-In-Co-Cu magnetic refrigeration alloy block blank is prepared. When the alloy block is in a 1.5T magnetic field, the adiabatic temperature change range is 1.01-2.61 K. The magnetic alloy can obtain excellent adiabatic temperature change at nearby the indoor temperature, along with a huge magnetocaloric effect, the magnetic alloy can be used as a magnetic refrigeration work medium, and the magnetic alloy has a high magnetic refrigeration efficiency and a wide temperature domain work range.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a Ni-Mn-In-Co-Cu magnetic refrigeration alloy material and a preparation method. Background technique [0002] Compared with the traditional gas compression refrigeration technology, magnetic refrigeration uses magnetic substances as the refrigerant, which has no damage to the ozone layer and no greenhouse effect, and the magnetic entropy density of the magnetic refrigerant is larger than that of gas, so the refrigeration device can be more compact; No need for a compressor, few moving parts and slow moving speed, low mechanical vibration and noise, high reliability, and long life; in terms of thermal efficiency, gas compression refrigeration technology can generally only reach 5-10% of the Carnot cycle, while magnetic Refrigeration technology can reach 30-60%, showing high refrigeration efficiency. Based on the above advantages, room temperature magnetic ...

Claims

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Application Information

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IPC IPC(8): C22C30/02C22C1/02C22F1/10H01F1/01
CPCC22C1/023C22C19/005C22C19/03C22C30/02C22F1/002C22F1/10H01F1/015
Inventor 李宗宾白嫄霞杨波赵骧左良
Owner NORTHEASTERN UNIV
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