A kind of ni-co-mn-in-ge magnetic refrigeration alloy material and preparation method
An alloy material, magnetic refrigeration technology, applied in the direction of magnetic materials, inorganic material magnetism, magnetic objects, etc., can solve the problem of unsatisfactory magnetocaloric effect, etc., and achieve the effect of abundant reserves, good refrigeration capacity, and excellent comprehensive performance.
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Embodiment 1
[0031] Ni-Co-Mn-In-Ge magnetic alloy, the sum of moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Co:Mn:In:Ge=45:5:36.5:12.5:1.
[0032] Ni 45 co 5 mn 36.5 In 12.5 Ge 1 The preparation method of magnetic alloy comprises the following steps:
[0033] (1) Raw material ratio: according to the molar ratio of Ni:Co:Mn:In:Ge=45:5:36.5:12.5:1;
[0034] (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;
[0035] (3) Heat treatment: Ni 45co 5 mn 36.5 In 12.5 Ge 1 Alloy ingots were directly quenched in ice water after being kept at 1173K for 24h to o...
Embodiment 2
[0039] Ni-Co-Mn-In-Ge 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:Co:Mn:In:Ge=45:5:36.5:11.5:2 .
[0040] The preparation method of Ni-Mn-In-Co-Cu magnetic refrigeration alloy material comprises the following steps:
[0041] (1) Raw material ratio: according to the molar ratio batching of Ni:Co:Mn:In:Ge=45:5:36.5:11.5:2;
[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 0.05MPa, repeat smelting for 4 to 5 times, and conduct arc smelting under electromagnetic stirring to obtain a polycrystalline parent alloy with uniform composition;
[0043] (3) Heat treatment: Ni 45 co 5 mn 36.5 In 11.5 Ge 2 Alloy ingots were directly quenched in ice wate...
Embodiment 3
[0047] Ni-Co-Mn-In-Ge 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:Co:Mn:In:Ge=45:5:36.5:10.5:3 .
[0048] Ni 45 co 5 mn 36.5 In 10.5 Ge 3 The preparation method of magnetic alloy comprises the following steps:
[0049] (1) Raw material ratio: according to the chemical formula Ni 45 co 5 mn 36.5 In 10.5 Ge 3 The molar ratio ingredients;
[0050] (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;
[0051] (3) Heat treatment: Ni 45 co 5 mn 36.5 In 10.5 Ge 3 Alloy ingots were dire...
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