High-temperature high-coercivity samarium-cobalt permanent magnet material and preparation method thereof

A permanent magnet material, high coercivity technology, applied in magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of low coercivity and magnetic energy product, etc., to improve high temperature coercivity and magnetic energy product, improve squareness, and promote the effect of grain growth

Active Publication Date: 2018-05-15
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem solved by the technology of the present invention: In order to solve the problem that the coercive force and magnetic energy product of the 2:17 type samarium cobalt permanent magnet material are generally low under high temperature conditions in the existing reports, a high temperature and high coercive force samarium cobalt permanent magnet material and Preparation

Method used

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  • High-temperature high-coercivity samarium-cobalt permanent magnet material and preparation method thereof
  • High-temperature high-coercivity samarium-cobalt permanent magnet material and preparation method thereof
  • High-temperature high-coercivity samarium-cobalt permanent magnet material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0048] Step 1: Ingredients and Melting

[0049] Rare earth element Sm with a purity of 99.95%, Co with a purity of 99.98%, Cu with a purity of 99.99%, Fe and Zr with a purity of 99.9% are used as raw materials, and they are placed in a water-cooled copper crucible in a vacuum melting furnace, which is easy to burn The damaged metal Sm was placed at the bottom of the crucible and vacuumed to 2×10 -3 ~5×10 -3 After Pa, fill the furnace body with high-purity argon gas, the volume percentage purity of argon gas is 99.99%, and the vacuum degree in the furnace rises to 0.8×10 5 Stop filling Pa, melt 3 to 4 times under the conditions of working voltage 30-45V, working current 600-800A, and obtain alloy ingot Ⅰ: Sm(Co 0.749 Fe 0.14 Cu 0.08 Zr 0.031 ) 7.43 .

[0050] Step 2: Optimization of ingot structure

[0051] Put the smelted alloy ingot Ⅰ into the vacuum furnace and evacuate to 2×10 -3 ~5×10 -3 Pa, filled with high-purity argon, and then pumped to 2×10 -3 ~5×10 -3 Aft...

Embodiment 2

[0071] Step 1: Ingredients and Melting

[0072] Rare earth element Sm with a purity of 99.95%, Co with a purity of 99.98%, Cu with a purity of 99.99%, Fe and Zr with a purity of 99.9% are used as raw materials, and they are placed in a water-cooled copper crucible in a vacuum melting furnace, which is easy to burn The damaged metal Sm was placed at the bottom of the crucible and vacuumed to 2×10 -3 ~5×10 -3 After Pa, fill the furnace body with high-purity argon gas, the volume percentage purity of argon gas is 99.99%, and the vacuum degree in the furnace rises to 0.8×10 5 After Pa, stop inflating, and melt under the conditions of working voltage 30-45V and current 600-800A to obtain alloy ingot II: Sm(Co 0.753 Fe 0.14 Cu 0.08 Zr 0.027 ) 7.43 .

[0073] Step 2: Optimization of ingot structure

[0074] Put the smelted alloy ingot II into the vacuum furnace and evacuate to 2×10 -3 ~5×10 -3 Pa, filled with high-purity argon, and then pumped to 2×10 -3 ~5×10 -3 After Pa...

Embodiment 3

[0100] Step 1: Ingredients and Melting

[0101] Rare earth element Sm with a purity of 99.95%, Co with a purity of 99.98%, Cu with a purity of 99.99%, Fe and Zr with a purity of 99.9% are used as raw materials, and they are placed in a water-cooled copper crucible in a vacuum melting furnace, which is easy to burn The damaged metal Sm was placed at the bottom of the crucible and vacuumed to 2×10 -3 ~5×10 -3 After Pa, fill the furnace body with high-purity argon gas, the volume percentage purity of argon gas is 99.99%, and the vacuum degree in the furnace rises to 0.8×10 5 Stop filling after Pa, and melt under the conditions of working voltage 30-45V and current 600-800A to obtain alloy ingot III: Sm(Co 0.739 Fe 0.14 Cu 0.09 Zr 0.031 ) 7.45 .

[0102] Step 2: Optimization of ingot structure

[0103] Put the smelted alloy ingot III into the vacuum furnace, and evacuate to 2×10 -3 ~5×10 -3 Pa, filled with high-purity argon, and then pumped to 2×10 -3 ~5×10 -3 After Pa...

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Abstract

The invention provides a high-temperature high-coercivity samarium-cobalt permanent magnet material and a preparation method thereof. The permanent magnet material is Sm(Co1-u-v-wFeuCuvZrw)z, whereinu ranges from 0.09-0.18, v ranges from 0.05-0.10, w ranges from 0.02-0.04 and z ranges from 6.9-7.8. The preparation method includes the steps that the rare earth element Sm with the purity of 99.95%,Co with the purity of 99.98%, Cu with the purity of 99.99%, Fe with the purity of 99.9% and Zr with the purity of 99.9% are evenly mixed and smelted into an alloy ingot, and the ingot is subjected tostructure optimization treatment; micron-sized alloy powder is prepared by using the powder metallurgy technology, then orientation forming, high-temperature sintering, solid solution and aging treatment are conducted, and the samarium-cobalt permanent magnetic alloy is prepared. According to the method, the proportion of a TbCu7 structure is effectively improved, and a samarium-cobalt permanentmagnet free of a Zr6(FeCo)23 phase and uniform in structure is prepared, has high coercivity, high magnetic energy and other excellent properties at ultra-high temperature and can be suitable for ultra-high-temperature environments with the temperature of 550 DEG C or above.

Description

technical field [0001] The invention relates to a high-temperature high-coercivity samarium-cobalt permanent magnet material and its preparation method, more precisely, it refers to a high-temperature samarium-cobalt permanent magnet material with high coercivity on the basis of maintaining a high magnetic energy product and its preparation The method belongs to the field of magnetic materials. Background technique [0002] With the development of aviation, aerospace, electronics and other fields, the demand for high coercive force and high energy product permanent magnet materials in the environment of 500-550 ℃ or even higher temperature is becoming increasingly urgent. For such high requirements, AlNiCo, SmCo 5 Materials such as , NdFeB, and nanocomposites cannot meet the high-temperature performance requirements, and the 2:17 high-temperature samarium-cobalt magnet with high Curie temperature, superior comprehensive magnetic properties and good environmental stability ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/055H01F41/02
CPCH01F1/0557H01F41/0266
Inventor 蒋成保邱鑫鑫刘敬华张天丽
Owner BEIHANG UNIV
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