Samarium-cobalt magnet and method for improving solid solubility of Zr element

A samarium cobalt magnet, solid solubility technology, applied in the direction of magnetic objects, magnetic materials, electrical components, etc., can solve problems such as the inhomogeneity of Zr solid solution can not be completely improved, to improve the performance of magnets, improve stability, improve high temperature stability sexual effect

Active Publication Date: 2018-11-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only promoting the solid solution of Zr by homogenizing the alloy ingot can not completely improve the problem of inhomogeneous solid solution of Zr

Method used

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  • Samarium-cobalt magnet and method for improving solid solubility of Zr element
  • Samarium-cobalt magnet and method for improving solid solubility of Zr element
  • Samarium-cobalt magnet and method for improving solid solubility of Zr element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Step 1: Ingredients and Melting

[0048] 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 arc 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, repeat the smelting for 3 to 4 times under the conditions of working voltage 30V-45V and working current 600A-800A, and cool down to obtain alloy ingot: Sm(Co 0.767 Fe 0.1 Cu 0。 1 Zr 0.033 ) 7.0 ;

[0049] Step 2: Milling and shaping

[0050] In a glove box filled with high-purity argon with an oxygen content lower than 0.5ppm, the ingot was pulverized with a pulverizer and ...

Embodiment 2

[0059] Step 1: Ingredients and Melting

[0060] 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 arc 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, repeat the smelting for 3 to 4 times under the conditions of working voltage 30V-45V and working current 600A-800A, and cool down to obtain alloy ingot: Sm(Co 0.65 Fe 0.24 Cu 0。 08 Zr 0.03 ) 7.6 ;

[0061] Step 2: Milling and shaping

[0062] In a glove box filled with high-purity argon with an oxygen content lower than 0.5ppm, the ingot was pulverized with a pulverizer and ...

Embodiment 3

[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 arc 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 -3After 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, repeat the smelting for 3 to 4 times under the conditions of working voltage 30V-45V and working current 600A-800A, and cool down to obtain alloy ingot: Sm(Co 0.60 Fe 0.32 Cu 0。 06 Zr 0.02 ) 7.8 ;

[0073] Step 2: Milling and shaping

[0074] In a glove box filled with high-purity argon with an oxygen content lower than 0.5ppm, the ingot was pulverized with a pulverizer and p...

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Abstract

The invention discloses a samarium-cobalt magnet and method for improving the solid solubility of a Zr element. By adjusting a solid solution temperature to Tst=1248-4*WFe(%)+-3 DEG C, the precipitation of a Zr-rich second phase is suppressed, the Zr element is used for replacing a Fe-Fe atom pair in a high-temperature 1:7H phase, so that the c / a shrinkage ratio of samarium-cobalt magnet main phase 1:7H is higher than 1%, the stability of a high-temperature phase 1:7H structure is improved, and after solid solution at a Tst temperature, the solid solution state of the magnet is a single phase1:7H phase. A single phase 1:7H magnet conducts solid solution at the Tst temperature, a Zr-rich precipitation phase content is less than 1 vol. %, the performance of the magnet and the squareness ofa demagnetization curve are optimized, and the method can be used for preparing samarium-cobalt magnets with different iron content components.

Description

technical field [0001] The invention relates to a samarium cobalt magnet and a method for improving the solid solubility of Zr element. Background technique [0002] As an important functional material, SmCo magnets have been widely used in computer technology, micro-bicommunication technology, automobile industry, aviation industry, automation technology, instrument technology and other important fields. SM 2 co 17 The type rare earth permanent magnet material has high theoretical magnetization and high Curie temperature, and is a high-performance permanent magnet material used in a wide temperature range. Moreover, compared with NdFeB magnets used at high temperatures, SmCo permanent magnet materials do not need to add heavy rare earth elements such as dysprosium and terbium. Therefore, the development of high-performance SmCo magnets is also important for the rational use and protection of rare earth elements in my country. are all significant. [0003] In the preparat...

Claims

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Application Information

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IPC IPC(8): H01F1/055H01F41/02C21D1/18C21D6/00
Inventor 蒋成保徐成张天丽王慧刘敬华
Owner BEIHANG UNIV
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