A kind of Mn-ni-sn-co alloy thin strip and its preparation method

A technology of thin strips and alloys, applied in the field of Mn-Ni-Sn-Co alloy thin strips and its preparation, can solve the problems of limited practical application, high brittleness of bulk alloys, and difficult processing, so as to expand the magnetic difference and improve Effect of saturation magnetization and improvement of magnetocaloric performance

Active Publication Date: 2018-10-23
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high brittleness of bulk alloys, it is difficult to carry out subsequent processing, which severely limits the practical application.

Method used

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  • A kind of Mn-ni-sn-co alloy thin strip and its preparation method
  • A kind of Mn-ni-sn-co alloy thin strip and its preparation method
  • A kind of Mn-ni-sn-co alloy thin strip and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In the Mn-Ni-Sn-Co alloy strip of this embodiment, the sum of the moles of elements in the alloy strip is 100, and the molar ratio of the elements is Mn:Ni:Sn:Co=50:37:8:5, Mn 50 Ni 37 sn 8 co 5 The thickness of the alloy ribbon was 100 μm.

[0044] mn 50 Ni 37 sn 8 co 5 The preparation method of alloy thin strip, comprises the following steps:

[0045] Step 1, preparation of polycrystalline parent alloy:

[0046] (1) Mn-Ni-Sn-Co alloy thin strips, according to the molar ratio of elements Mn:Ni:Sn:Co=50:37:8:5, weigh Mn, Ni, Sn and Co respectively, and place them in a vacuum arc In the water-cooled copper crucible of the smelting furnace, place Mn at the bottom of the water-cooled copper crucible, place Ni, Sn and Co above Mn to reduce the volatilization of Mn during the smelting process, and vacuumize the chamber of the arc melting furnace to 3×10 -3 After Pa, argon gas is introduced to 0.05MPa, and the arc generated by the tungsten electrode is used for melti...

Embodiment 2

[0056] In the Mn-Ni-Sn-Co alloy strip of this embodiment, the sum of the moles of elements in the alloy strip is 100, and the molar ratio of the elements is Mn:Ni:Sn:Co=50:36:8:6, Mn 50 Ni 36 sn 8 co 6 The thickness of the alloy ribbon was 100 μm.

[0057] Mn in this example 50 Ni 36 sn 8 co 6 The preparation method of alloy thin strip, comprises the following steps:

[0058] Step 1, preparation of polycrystalline parent alloy:

[0059] (1) Mn-Ni-Sn-Co alloy strips, according to the molar ratio of elements Mn:Ni:Sn:Co=50:36:8:6, weigh Mn, Ni, Sn and Co respectively, and place them in a vacuum arc In the water-cooled copper crucible of the smelting furnace, place Mn at the bottom of the water-cooled copper crucible, place Ni, Sn and Co above Mn to reduce the volatilization of Mn during the smelting process, and vacuumize the chamber of the arc melting furnace to 3×10 -3 After Pa, argon gas is introduced to 0.05MPa, and the arc generated by the tungsten electrode is use...

Embodiment 3

[0069] In the Mn-Ni-Sn-Co alloy strip of this embodiment, the sum of the moles of elements in the alloy strip is 100, and the molar ratio of the elements is Mn:Ni:Sn:Co=50:35:8:7, Mn 50 Ni 35 sn 8 co 7 The thickness of the alloy ribbon was 100 μm.

[0070] Mn in this example 50 Ni 35 sn 8 co 7 The preparation method of alloy thin strip, comprises the following steps:

[0071] Step 1, preparation of polycrystalline parent alloy:

[0072] (1) Mn-Ni-Sn-Co alloy thin strips, according to the molar ratio of elements Mn:Ni:Sn:Co=50:35:8:7, weigh Mn, Ni, Sn and Co respectively, and place them in a vacuum arc In the water-cooled copper crucible of the smelting furnace, place Mn at the bottom of the water-cooled copper crucible, place Ni, Sn and Co above Mn to reduce the volatilization of Mn during the smelting process, and vacuumize the chamber of the arc melting furnace to 3×10 -3 After Pa, argon gas is introduced to 0.05MPa, and the arc generated by the tungsten electrode is ...

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Abstract

The invention provides a Mn-Ni-Sn-Co alloy ribbon and a preparation method thereof, and belongs to the technical field of new materials. The Mn-Ni-Sn-Co alloy ribbon is characterized in that the sum of the molar numbers of elements is 100, and the molar ratio of the elements is shown as that Mn: Ni: Sn: Co= (49.5-50.5): (33.5-38.5): (7.5-8.5): (3.5-8.5). The preparation method comprises the following steps: (1) repeatedly smelting at a plurality of times in a vacuum arc smelting manner; and (2) preparing the alloy ribbon being 90 to 120 microns in thickness by a melt spinning method. According to the alloy ribbon, the magnetic transition and the structure transition synergistically occur during the temperature increase process, so that the alloy ribbon has the characteristic of inducing reverse martensite transformation by a magnetic field; Co is added and can improve the saturation magnetizing intensity of a ferromagnetic austenite, the magnetism difference between austenite and martensite is increased, and as a result, the magnetic heating performance of a polycrystalline alloy ribbon can be obviously improved; the magnetic entropy change under an 1T magnetic field is 2.4-7.6Jkg<-1>K<-1>; the magnetic entropy change under an 1.5T magnetic field is 3.5-11.0Jkg<-1>K<-1>.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a Mn-Ni-Sn-Co alloy thin strip and a preparation method thereof. Background technique [0002] Mn-Ni-Sn alloy is a new type of functional material with thermoelastic martensitic transformation characteristics discovered in recent years. This type of material exhibits strong magnetic-structural coupling characteristics during the phase transition process, that is, the phase transition process of martensite is accompanied by a huge magnetic change, which can transform from ferromagnetic austenite to weakly magnetic martensite. Since the magnetic field can stabilize the structural phase with higher magnetization, the transformation from the martensite phase with low magnetization intensity to the austenite phase with high magnetization intensity can occur under the action of an external magnetic field, that is, the magnetic field induces reverse martensite phase tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/03B22D11/06H01F1/00
CPCB22D11/06B22D11/0642B22D11/0697C22C1/03C22C22/00C22C30/00H01F1/015
Inventor 李宗宾姜怡雯李振庄杨波赵骧左良
Owner NORTHEASTERN UNIV LIAONING
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