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Preparation method of sm-co based amorphous nanocrystalline thin strip magnet

An amorphous nanocrystal, sm-co technology, applied in the direction of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem of low hard magnetic properties of alloys, Sm-based amorphous alloy materials have not yet appeared, and no existing High coercive force Sm-Co based amorphous nanocrystalline alloy materials and other issues

Active Publication Date: 2016-02-03
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN100560774C discloses a Sm-Al-Co system Sm-based ternary amorphous alloy prepared by copper mold negative pressure suction casting method, and its composition range is Sm x (Al 50-y co 50+y ) 100-x (x=50~58at.%, y=-10~+7at.%), where Sm 50 Al 25 co 25 Has the best ability to form amorphous, but according to the relevant reports of the research group (LuC.L., LiuH.M., WangK.F, etal.MagneticpropertiesofSm-basedbulkmetallicsglasses[J].JMagnMagnMater, 2010, 322: 2845-2850) , the hard magnetic properties of this series of alloys are very low, where Sm 52 Al 24 co 24 At 300K (ie room temperature) at 2.4MA·m -1 Measured under the maximum external magnetic field, its remanence and intrinsic coercive force both tend to zero, and the magnetization under the maximum external magnetic field is only about 0.2Am 2 kg -1
So far, there have been no reports of Sm-based amorphous alloy materials with high coercivity at room temperature, let alone reports of Sm-Co-based amorphous nanocrystalline alloy materials with high coercivity.

Method used

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  • Preparation method of sm-co based amorphous nanocrystalline thin strip magnet
  • Preparation method of sm-co based amorphous nanocrystalline thin strip magnet
  • Preparation method of sm-co based amorphous nanocrystalline thin strip magnet

Examples

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Embodiment 1

[0043] Sm of Sm-Co-based Amorphous and Nanocrystalline Thin Strip Magnets 11.3 co 56.6 Fe 7.5 Zr 4.7 B 3.8 (Nb 4.7 al 5.7 Si 4.7 C 1.0 ) A preparation method of an amorphous nanocrystalline thin strip magnet.

[0044] The first step, raw material preparation

[0045] According to the raw material ratio Sm in atomic percentage 11.3 co 56.6 Fe 7.5 Zr 4.7 B 3.8 (Nb 4.7 al 5.7 Si 4.7 C 1.0 ), take raw material pure Sm, pure Co, pure Fe, pure Zr, B-Fe alloy, pure Nb, pure Al, pure Si and pure graphite C powder, additionally add the pure The mass percentage of Sm is 3% pure Sm, thus completing the raw material preparation.

[0046] The second step is to melt the raw materials to prepare master alloy ingots

[0047] Put all the raw materials prepared in the first step into the crucible of the vacuum arc melting furnace. When melting, first vacuumize the furnace body to 10 -3 Pa, the temperature of the furnace is raised above the melting point of the raw metal Zr, ...

Embodiment 2

[0052] Except that the peripheral speed of the cooling molybdenum roller wheel rotation of the third step in embodiment 1, that is, the rapid quenching speed of the melt becomes 5m·s -1 Except, others are all the same as embodiment 1, and the prepared Sm 11.3 co 56.6 Fe 7.5 Zr 4.7 B 3.8 (Nb 4.7 al 5.7 Si 4.7 C 1.0 ) The magnetic properties, thickness and average grain size parameters of the main crystal phase of the amorphous and nanocrystalline thin strip magnets are shown in Table 1.

Embodiment 3

[0054] Except the circumferential speed that the cooling molybdenum roll wheel of the third step in the embodiment 1 rotates, the rapid quenching speed of the melt becomes 15m·s -1 Except, others are all the same as embodiment 1, and the prepared Sm 11.3 co 56.6 Fe 7.5 Zr 4.7 B 3.8 (Nb 4.7 al 5.7 Si 4.7 C 1.0 ) The magnetic properties, thickness and average grain size parameters of the main crystal phase of the amorphous and nanocrystalline thin strip magnets are shown in Table 1.

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Abstract

The invention relates to a preparation method of a Sm-Co-based amorphous nanocrystalline thin-strip magnet, and relates to a rare earth metal and magnetic transition metal containing magnet made of a hard magnetic material. The Sm-Co-based amorphous nanocrystalline thin-strip magnet has a chemical formula of SmxCoyFezZruBvQw, wherein the symbols of qualified elements metered by atomic percentage meet the following conditions: x + y + z + u + v + w = 100, x = 9.0-14.0, y = 45.0-70.5, z = 2.8-18.4 , u = 1.1-7.0, v = 3.8-19.0, w = 1.0-21.2, and Q is one to four elements of Nb, Al, Si, Cu and C. The Sm-Co-based amorphous nanocrystalline thin-strip magnet prepared by a centrifugal fast quenching and strip throwing technology has the advantages of high room temperature intrinsic coercivity, high resistance to corrosion and high strength.

Description

technical field [0001] The technical scheme of the present invention relates to a magnet of a hard magnetic material containing rare earth metals and magnetic transition metals, in particular to a preparation method of a Sm-Co-based amorphous nanocrystalline thin ribbon magnet. Background technique [0002] Amorphous state refers to a state in which atoms in the internal structure of a substance are arranged in a long-range disorder. In 1960, Klement et al. (KlementW., WillensR.H., DuwezP.Non-crystalline structureinsolidified gold-siliconalloys[J].Nature, 1960, 187:869-870) successfully applied the rapid quenching technology to the cooling of Au-Si alloys for the first time , to obtain an alloy with an amorphous structure, also known as metallic glass. Due to the atomic long-range disordered structure of metallic glass, which combines the properties of solid and liquid, metal and glass, it exhibits many unique properties, such as excellent magnetic properties, high corrosio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F7/02H01F1/047C22C45/00B22D11/06
Inventor 孙继兵步绍静崔春翔杨薇丁贺伟韩瑞平
Owner HEBEI UNIV OF TECH
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