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Ni-Mn-Sb alloy material and spark plasma sintering preparation method thereof

A discharge plasma and ni-mn-sb technology, which is applied in metal material coating process, ion implantation plating, polycrystalline material growth, etc., can solve the problems of long sintering time, slow heating rate, and low production efficiency, and achieve The effect of low cost, low synthesis temperature and short time

Active Publication Date: 2018-11-23
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ren Shangkun and others prepared Ni-Mn-Sb alloy by hot pressing and sintering in the preparation and structural stability of Half-Heusler semimetal NiMnSb, but this method has slow heating rate, long sintering time and low production efficiency

Method used

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  • Ni-Mn-Sb alloy material and spark plasma sintering preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The sum of atomic ratios of elements in the Ni-Mn-Sb alloy is 100, and the atomic ratio is Ni:Mn:Sb=33.3:33.3:33.3.

[0030] Ni 33.3 mn 33.3 Sb 33.3 A method for preparing an alloy target, comprising the following steps:

[0031] Step 1, the preparation of Ni-Mn-Sb alloy ingot:

[0032] (1) Raw material ratio: according to the chemical formula Ni 33.3 mn 33.3 Sb 33.3 Ingredients;

[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 0.04-0.05MPa, and repeat the smelting for 4-5 times, and the smelting time is 2-2.5 hours. Arc melting is carried out under electromagnetic stirring to obtain alloy ingots with uniform composition;

[0034] Step 2, preparation of Ni-Mn-Sb alloy target:

[0035] (1) The Ni-Mn-Sb alloy ingot is ground...

Embodiment 2

[0038] The sum of atomic ratios of elements in the Ni-Mn-Sb alloy is 100, and the atomic ratio is Ni:Mn:Sb=33.3:33.3:33.3.

[0039] Ni 33.3 mn 33.3 Sb 33.3 A method for preparing an alloy target, comprising the following steps:

[0040] Step 1, the preparation of Ni-Mn-Sb alloy ingot:

[0041] (1) Raw material ratio: according to the chemical formula Ni 33.3 mn 33.3 Sb 33.3 Ingredients;

[0042] (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 0.04-0.05MPa, and repeat the smelting for 4-5 times, and the smelting time is 2-2.5 hours. Arc melting is carried out under electromagnetic stirring to obtain alloy ingots with uniform composition;

[0043] Step 2, preparation of Ni-Mn-Sb alloy target:

[0044] (1) The Ni-Mn-Sb alloy ingot is ground i...

Embodiment 3

[0047] The sum of the atomic ratios of elements in the Ni-Mn-Sb alloy is 100, and the atomic ratio is n(Ni):n(Mn):n(Sb)=33.3:33.3:33.3.

[0048] Ni 33.3 mn 33.3 Sb 33.3 A method for preparing an alloy target, comprising the following steps:

[0049] Step 1, the preparation of Ni-Mn-Sb alloy ingot:

[0050] (1) Raw material ratio: according to the chemical formula Ni 33.3 mn 33.3 Sb 33.3 Ingredients;

[0051] (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 0.04-0.05MPa, and repeat the smelting for 4-5 times, and the smelting time is 2-2.5 hours. Arc melting is carried out under electromagnetic stirring to obtain alloy ingots with uniform composition;

[0052] Step 2, preparation of Ni-Mn-Sb alloy target:

[0053] (1) The Ni-Mn-Sb alloy in...

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Abstract

The invention belongs to the technical field of material forming and preparation processes of magnetron sputtering alloy targets, and provides a Ni-Mn-Sb alloy material and a spark plasma sintering preparation method thereof. The preparation process includes the following steps that Ni, Mn and Sb raw materials are weighed according to the raw material ratio, vacuum arcs are used for repeated smelting, a polycrystal cast ingot is prepared, the polycrystal cast ingot is ground into powder through a grinder, the powder is put in a graphite grinding tool, and the powder is sintered in the vacuum environment in a spark plasma sintering system, wherein the heating speed is 30-100 DEG C / min, the pressure is 40-80 MPa, the sintering temperature is 600-950 DEG C, and the heat preserving time is 5-20 min. The process is simple, and the prepared Ni-Mn-Sb alloy has excellent mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of material forming and preparation technology of magnetron sputtering alloy targets, in particular to a Ni-Mn-Sb material with excellent mechanical properties synthesized by a spark plasma sintering process, a Ni-Mn-Sb alloy material and its Spark plasma sintering preparation method. Background technique [0002] Ni-Mn-Sb alloy, as a half-metallic material, has a theoretical spin polarizability near the Fermi surface that can reach 100% compared with traditional metal materials. Semi-metallic materials have broad application prospects in the preparation of magnetic memory devices. Chinese patent 201520061038.X discloses a vertical magnetoresistive element, in which Ni-Mn-Sb thin film can be used as the spin polarization stabilization layer material. In the past technology, the preparation of Ni-Mn-Sb film mainly adopts physical vapor deposition method, chemical vapor deposition method, plasma enhanced che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C12/00B22F3/105C30B28/06C30B29/52C23C14/35
CPCB22F3/105B22F2003/1051B22F2998/10C22C12/00C22C30/00C23C14/3414C23C14/35C30B28/06C30B29/52B22F9/04
Inventor 杨波郝晓文李宗宾赵骧左良
Owner NORTHEASTERN UNIV
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