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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

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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
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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

A Mn‑Ni‑Sn‑Co alloy thin strip and a preparation method thereof belong to the field of new material technology. The sum of the number of moles of elements in the Mn‑Ni‑Sn‑Co alloy thin strip is 100, and the molar ratio of the elements is Mn:Ni:Sn:Co=(49.5~50.5): (33.5~38.5): (7.5~8.5) (3.5~8.5); The preparation method is: (1) Vacuum arc melting and repeated melting for many times; (2) The strip spinning method prepares alloy thin strips with a thickness of 90~120 μm. During the heating process, the alloy thin strip of the present invention exhibits the coordinated occurrence of magnetic transformation and structural transformation, and has the characteristics of magnetic field-induced martensite reverse phase transformation. The addition of Co in the alloy thin strip of the present invention increases the saturation magnetization of ferromagnetic austenite, expands the magnetic difference between austenite and martensite, and significantly improves the magnetocaloric properties of the polycrystalline alloy thin strip. At 1T Under a magnetic field, the change in magnetic entropy is 2.4~7.6Jkg‑1K‑1, and under a 1.5T magnetic field, the change in magnetic entropy is 3.5~11.0Jkg‑1K‑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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