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Block-shaped nanocrystalline magnetically soft alloy material and preparation method thereof

A nanocrystalline soft magnetic and alloy material technology, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of alloy soft magnetic properties deterioration, high sintering temperature, and long sintering time, and achieve fine grain size and high Effects of operating temperature range, ease of miniaturization and integration

Inactive Publication Date: 2010-01-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high sintering temperature and long sintering time in the general sintering method, the crystal grains grow up, resulting in the deterioration of the soft magnetic properties of the alloy, which cannot meet the needs of engineering applications. Key technologies for bulk nanocrystalline soft magnetic alloy materials with magnetic properties

Method used

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  • Block-shaped nanocrystalline magnetically soft alloy material and preparation method thereof
  • Block-shaped nanocrystalline magnetically soft alloy material and preparation method thereof
  • Block-shaped nanocrystalline magnetically soft alloy material and preparation method thereof

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Embodiment 1

[0055] Select bulk Fe, Co, Cu and powdered Nb, B elements with a purity greater than 99.5%, and distribute Fe according to the atomic percentage of each element in the alloy composition 42.5 co 42.5 Nb 6 Cu 1 B8 Ingredients and mixtures are smelted in an electric arc furnace at a melting temperature of 1100°C. The smelted samples are cut into small pieces and made into amorphous thin strips using a single-roller stripping device. Keep warm at ℃ for 2 hours, then pulverize into 100μm powder, shape and sinter in SPS sintering device, sintering temperature 720℃, holding time 10 minutes, keep pressure 60MPa, and finally get a bulk nanocrystalline soft magnetic with a size of φ10×5mm The alloy material has a saturation magnetization Ms of 1.75T, a Curie temperature Tc of 560°C and a coercive force of 1177.8A / m. The hysteresis loop diagram of the soft magnetic bulk alloy prepared in this embodiment can be found in figure 1 .

Embodiment 2

[0057] Select bulk Fe, Co, Cu, Sm and powdered Nb, B elements with a purity greater than 99.5%, according to the atomic percentage distribution of each element in the alloy composition Fe 42.5 co 42.5 Nb 4.5 Cu 1 B 8 SM 1.5 Ingredients and mixtures are smelted in an electric arc furnace at a melting temperature of 1100°C. The smelted samples are cut into small pieces and made into amorphous thin strips using a single-roller stripping device. Keep warm at ℃ for 1 hour, then pulverize into 50μm powder, shape and sinter in SPS sintering device, sintering temperature 800℃, holding time 5 minutes, keep pressure 60MPa, and finally get a bulk nanocrystalline soft magnetic with a size of φ10×5mm The alloy material has a saturation magnetization Ms of 1.85T, a Curie temperature Tc of 645°C and a coercive force of 715.4A / m. The hysteresis loop diagram of the soft magnetic bulk alloy prepared in this embodiment can be found in figure 2 .

Embodiment 3

[0059] Select bulk Fe, Co, Cu, Sm and powdered Nb, B elements with a purity greater than 99.5%, according to the atomic percentage distribution of each element in the alloy composition Fe 42.5 co 42.5 Nb 3 Cu 1 B 8 SM 3 Ingredients and mixtures are smelted in an electric arc furnace at a melting temperature of 1100°C. The smelted samples are cut into small pieces and made into amorphous thin strips using a single-roller stripping device. Keep warm at ℃ for 2 hours, then pulverize into 100μm powder, shape and sinter in SPS sintering device, sintering temperature 800℃, holding time 8 minutes, keep pressure 65MPa, and finally get a bulk nanocrystalline soft magnetic with a size of φ10×5mm The alloy material has a saturation magnetization Ms of 1.68T, a Curie temperature Tc of 660°C and a coercive force of 791.8A / m. The hysteresis loop diagram of the soft magnetic bulk alloy prepared in this embodiment can be found in image 3 .

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Abstract

The invention relates to a block-shaped nanocrystalline magnetically soft alloy material and a preparation method thereof. The block-shaped nanocrystalline magnetically soft alloy material is an Fe-Co-Cu-B-X alloy material and contains the following atomic content of each component in percentage by weight in the total atomic weight of the alloy material: 42-45% of Fe, 42-45% of Co, 0.5-1.5% of Cu, 6-10% of B and 3-8% of X, wherein X is selected from one or two of Nb and Sm. The preparation method of the block-shaped nanocrystalline magnetically soft alloy material comprises the following steps: smelting, thin amorphous ribbon spurting, heat treatment, pulverization and spark plasma sintering. The block-shaped nanocrystalline magnetically soft alloy material has higher Curie temperature and saturated magnetization intensity and extensive application.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, in particular to a bulk nanocrystalline soft magnetic alloy material and a preparation method thereof. Background technique [0002] Soft magnetic materials are easy to magnetize and demagnetize because of their small coercive force, and can be widely used as a path for magnetic force lines, that is, as magnetic materials, various magnetic amplifiers and filter coils required for computers, mobile phones, and flat-panel display technologies. , variable frequency inductors, variable frequency transformers, reactors, and various switching power supplies, inverter power supplies, choke coils in PFC technology, energy storage inductors and other devices, all use their good soft magnetic properties. Due to its low Curie temperature, the ferrite soft magnetic material currently in the mainstream has a very low saturation magnetic induction when it is above 100°C, so its use temperature is li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147C22C30/02C22C1/02C22C1/05B22D11/06
Inventor 刘岩潘秀红艾飞金蔚青金飞高国忠冯楚德
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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