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Apreparation method of SmCu alloy doped samarium-cobalt based nano composite permanent magnet

A nano-composite, permanent magnet technology, used in magnetic objects, metal processing equipment, magnetic materials, etc., can solve problems such as magnetic properties gap, achieve good magnetic properties, improve coercivity, and improve the effect of grain boundaries

Active Publication Date: 2018-12-07
ZHEJIANG ZHONGKE MAGNETIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although SmCo 5 Nanocrystalline permanent magnets have high coercive force and high Curie temperature, but there is still a big gap between their magnetic properties and NdFeB

Method used

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  • Apreparation method of SmCu alloy doped samarium-cobalt based nano composite permanent magnet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Prepare the raw materials first, weigh the raw materials according to the following weight ratio: Sm: 20%, Ce: 6%, Co: 56%, Fe: 10%, Cu: 5%, Zr: 3%, mix the raw materials and carry out vacuum Melting, and then high-energy ball milling for 2 hours to make alloy powder;

[0020] 2) According to Sm 6 Cu 4 Alloy composition Weigh and mix each raw material, vacuum melt the mixed raw material, and then melt the melted Sm 6 Cu 4 After the alloy ingot is melted, it is poured into the magnetron sputtering target mold, and after cooling, it is ground and cut to obtain Sm 6 Cu 4 Alloy sputtering target;

[0021] 3) Using magnetron sputtering technology to make the Sm prepared in step (2) 6 Cu 4 The alloy target is plated with (Sm, Ce) prepared in step (1). 1 (Co, Fe, Cu, Zr) 5 A mixed powder is obtained on the alloy powder; the vacuum degree of the vacuum chamber during the sputtering process is 8×10 - 2 Pa, the magnetron sputtering current is 20A, and the magnetron ...

Embodiment 2

[0029] 1) Prepare the raw materials first, weigh the raw materials according to the following weight ratio: Sm: 25%, Ce: 2.5%, Co: 53.5%, Fe: 11%, Cu: 6%, Zr: 2%, mix the raw materials and vacuum Melting, and then high-energy ball milling for 3 hours to make alloy powder;

[0030] 2) According to Sm 6 Cu 4 Alloy composition Weigh and mix each raw material, vacuum melt the mixed raw material, and then melt the melted Sm 6 Cu 4 After the alloy ingot is melted, it is poured into the magnetron sputtering target mold, and after cooling, it is ground and cut to obtain Sm 6 Cu 4 Alloy sputtering target;

[0031] 3) Using magnetron sputtering technology to make the Sm prepared in step (2) 6 Cu 4 The alloy target is plated with (Sm, Ce) prepared in step (1). 1 (Co, Fe, Cu, Zr) 5 A mixed powder is obtained on the alloy powder; the vacuum degree of the vacuum chamber during the sputtering process is 8×10 - 2 Pa, the magnetron sputtering current is 20A, and the magnetron sputte...

Embodiment 3

[0039] 1) Prepare the raw materials first, weigh the raw materials according to the following weight ratio: Sm: 27%, Ce: 2.7%, Co: 50.8%, Fe: 11%, Cu: 5.5%, Zr: 3%, mix the raw materials and then vacuum Melting, and then high-energy ball milling for 4 hours to make alloy powder;

[0040] 2) According to Sm 6 Cu 4 Alloy composition Weigh and mix each raw material, vacuum melt the mixed raw material, and then melt the melted Sm 6 Cu 4 After the alloy ingot is melted, it is poured into the magnetron sputtering target mold, and after cooling, it is ground and cut to obtain Sm 6 Cu 4 Alloy sputtering target;

[0041] 3) Using magnetron sputtering technology to make the Sm prepared in step (2) 6 Cu 4 The alloy target is plated with (Sm, Ce) prepared in step (1). 1 (Co, Fe, Cu, Zr) 5 A mixed powder is obtained on the alloy powder; the vacuum degree of the vacuum chamber during the sputtering process is 8×10 - 2 Pa, the magnetron sputtering current is 20A, and the magnetron...

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Abstract

The invention discloses a preparation method of a SmCu alloy doped samarium-cobalt-based nano composite permanent magnet, belonging to the technical field of magnetic materials. The material takes 1:5-type SmCo nanometer magnet and nanocrystalline alpha-Fe composite magnet as the base body, employs the magnetron sputtering and spark plasma sintering technology to take the low melting point Sm_6Cu_4 alloy as interface phase to improve the grain boundary and diffuse into the hard magnetic phase, , thus improving the magnet coercivity, and the Sm-Co based nanocrystalline composite permanent magnet with good magnetic properties was obtained. At that same time, the invention has the advantage of simple process and low cost, and is favorable for the application of samarium-cobalt-based nano composite permanent magnet in more permanent magnet device.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a preparation method of a samarium-cobalt-based nanocomposite permanent magnet doped with a SmCu alloy. Background technique [0002] In recent years, due to the potential application in high-tech fields, such as computer, information storage, biomedicine, and micro-nano machinery, the research of nanocrystalline permanent magnet materials has attracted more and more attention. However, due to the superparamagnetic effect, the coercive force of general permanent magnetic materials decreases significantly at the nanoscale. Only samarium cobalt, a material with high magnetocrystalline anisotropy, can maintain a certain coercive force. Especially like SmCo 5 The material has the magnetocrystalline anisotropy constant in the permanent magnetic material K u (2.3×10 8 erg / cm 3 ), so its superparamagnetic limit is also the smallest, reaching 2.2 nm, which is an ideal mat...

Claims

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Application Information

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IPC IPC(8): H01F1/055B22F1/02C23C14/35C23C14/16B22F3/02B22F3/14
CPCH01F1/0557C23C14/165C23C14/35B22F3/02B22F3/14B22F2003/145B22F2998/10B22F1/17
Inventor 泮敏翔吴琼葛洪良张朋越俞能君
Owner ZHEJIANG ZHONGKE MAGNETIC IND
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