A kind of amorphous composite material not containing Fe, Co, Ni and its preparation method and application

An amorphous composite material and nanocrystalline technology, which is applied in the amorphous composite material of Ni and its preparation, does not contain Fe and Co, and can solve the problems of high cost, limited practical application and high rare earth content.

Active Publication Date: 2021-04-27
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Er disclosed by the above-mentioned patented technology 60 Cu 20 Al 20 Amorphous low-temperature magnetic refrigeration materials have high rare earth content (atomic percentage ≥ 56%), resulting in high cost and limiting their practical application

Method used

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  • A kind of amorphous composite material not containing Fe, Co, Ni and its preparation method and application
  • A kind of amorphous composite material not containing Fe, Co, Ni and its preparation method and application
  • A kind of amorphous composite material not containing Fe, Co, Ni and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Preparation of Er 45 Cu 45 Al 10 Amorphous composite materials.

[0043] In this embodiment, the amorphous composite material is composed of Er, Cu and Al with an atomic ratio of 45:45:10.

[0044] The Er 45 Cu 45 Al 10 The preparation method of the amorphous composite material is as follows:

[0045] According to the molecular formula of the chemical composition, Er, Cu and Al with a raw material purity of more than 99.9wt% are prepared according to the atomic ratio of 45:45:10, and the electric arc furnace (the electric arc furnace is first evacuated to 3 × 10 -3 Pa, then filled with argon to 5×10 4 Pa) mixed evenly and smelted for more than three times, after cooling, the ternary alloy Er 45 Cu 45 Al 10 The master alloy ingot is cast; and then the master alloy ingot is melted in an argon gas with an intermediate frequency power supply using a vacuum stripping device. When the melting is complete and the composition is uniform, the molten metal is sprayed to...

Embodiment 2

[0054] Preparation of Er 40 Cu 40 Al 20 Amorphous composite materials.

[0055] In this embodiment, the amorphous composite material is composed of Er, Cu and Al with an atomic ratio of 40:40:20.

[0056] The Er 45 Cu 45 Al 10 The preparation method of the amorphous composite material is as follows:

[0057] According to the molecular formula of the chemical composition, after the Er, Cu and Al with a raw material purity of more than 99.9wt% are prepared according to the atomic ratio of 40:40:20, the electric arc furnace (the electric arc furnace is first evacuated to 3 × 10 -3 Pa, then filled with argon to 5×10 4 Pa) mixed evenly and smelted for more than three times, after cooling, the ternary alloy Er 40 Cu 40 Al 20 The master alloy ingot is cast; and then the alloy ingot is melted in an argon gas with an intermediate frequency power supply by using a vacuum stripping device. When the melting is completely uniform, the molten metal is sprayed to a speed of 30m / s t...

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Abstract

The invention discloses an amorphous composite material not containing Fe, Co, Ni, the chemical formula is (Er 0.5 Cu 0.5 ) 100‑x al x , where 10≤x≤20. The present invention also provides the preparation method of the amorphous composite material, comprising the steps of: (1) putting metal Er, Cu and Al in an electric arc furnace in proportion, melting evenly, and obtaining a master alloy ingot after cooling; (2) ) re-melting the master alloy ingot into a master alloy melt, spraying the master alloy melt onto the surface of a rotating copper roller, and quenching to obtain a strip-shaped amorphous composite material. The invention also discloses the application of the amorphous composite material as a magnetic refrigerant material. Because the amorphous composite material of the present invention does not contain elements having strong antiferromagnetic coupling effects with Er such as Fe, Co, Ni, etc., it has more excellent magneto-caloric properties, and can realize larger magneto-caloric properties with less rare earth elements. Magnetocaloric effect, while saving material cost.

Description

technical field [0001] The invention relates to the technical field of magnetic refrigeration materials, in particular to an amorphous composite material not containing Fe, Co and Ni, a preparation method and application thereof. Background technique [0002] Refrigeration technology has a wide range of applications in human life and production. Currently, traditional refrigeration technology works on the principle of gas compression / expansion, and the refrigerant used is a substance called "freon" or "chlorofluorocarbon". The entry of such substances into the atmosphere will destroy the atmospheric ozone layer, further worsen the global greenhouse effect, and cause great harm to human life and even survival. At present, a broad consensus has been reached in the world that the refrigerant used in traditional refrigeration technology will be gradually reduced until it is finally stopped. Under the above background, there is an urgent need to develop alternative materials an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00
CPCC22C45/001C22C1/11
Inventor 霍军涛冯静清王军强
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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