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Method for preparing Co-Gd alloy capable of improving soft magnetic performance

A co-gd, alloy technology, applied in the field of magnetic materials, to achieve excellent magnetostrictive properties, rich and colorful solidification structure, and reduce the effect of defect density

Inactive Publication Date: 2012-11-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the preparation of (Co)-Co by single-roll technology 17 Gd 2 Eutectic Alloy Ribbon has not been covered yet

Method used

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  • Method for preparing Co-Gd alloy capable of improving soft magnetic performance
  • Method for preparing Co-Gd alloy capable of improving soft magnetic performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] ①Co with a purity of 99.99% and Gd with a purity of 99.9% are melted into a Co-7.5at%Gd alloy under the protection of high-purity Ar gas. The sample mass is 4 grams. The heating time is controlled by an infrared thermometer. Turn off the heat when it reaches level. ②Put the melted alloy into a Φ16mm×150mm quartz test tube with a Φ0.6mm nozzle at the bottom of the vacuum chamber, and evacuate to 2.0×10 -2 Pa back filled with high-purity He gas (99.995%) to 1 atmosphere. Repeat "vacuumizing-inflating" 3~5 times. ③Using high-frequency electromagnetic induction method to heat the fused alloy to melt and overheat above 1500K. After 30 seconds of heat preservation, blow high-pressure Ar gas into the quartz tube, and blow the molten sample to rotate at a linear speed of 15m / s. Alloy thin strips are prepared on a single-roller made of pure copper, and the diameter of the copper single-roller is 120mm. ④Put the prepared alloy strip into the GSL1300X tube furnace, pass through...

Embodiment 2

[0026] ①Co with a purity of 99.99% and Gd with a purity of 99.9% were melted into a Co-7.5at%Gd alloy under the protection of high-purity Ar gas, and the sample mass was 4 grams. Use an infrared thermometer to control the heating time, and stop heating when the heating curve tends to be horizontal. ②Put the melted alloy into a Φ16mm×150mm quartz test tube with a Φ0.6mm nozzle at the bottom of the vacuum chamber, and evacuate to 2.0×10 -2 Pa back filled with high-purity He gas (99.995%) to 1 atmosphere. Repeat "vacuumizing-inflating" 3~5 times. ③Using high-frequency electromagnetic induction method to heat the fused alloy to melt and overheat above 1500K, after 30 seconds of heat preservation, blow high-pressure Ar gas into the quartz tube, and blow the molten sample to rotate at the surface speed of 20m / s Alloy thin strips are prepared on a single-roller made of pure copper, and the diameter of the copper single-roller is 120mm. ④Put the prepared alloy strip into the GSL130...

Embodiment 3

[0028] ①Co with a purity of 99.99% and Gd with a purity of 99.9% were melted into a Co-7.5at%Gd alloy under the protection of high-purity Ar gas, and the sample mass was 4 grams. Use an infrared thermometer to control the heating time, and stop heating when the heating curve tends to be horizontal. ②Put the melted alloy into a Φ16mm×150mm quartz test tube with a Φ0.6mm nozzle at the bottom of the vacuum chamber, and evacuate to 2.0×10 -2 Pa back filled with high-purity He gas (99.995%) to 1 atmosphere. Repeat "vacuumizing-inflating" 3~5 times. ③Using high-frequency electromagnetic induction method to heat the fusion alloy to melt and overheat above 1500K, after 30 seconds of heat preservation, blow high-pressure Ar gas into the quartz tube, and blow the molten sample to rotate at the surface speed of 30m / s Alloy thin strips are prepared on a single-roller made of pure copper, and the diameter of the copper single-roller is 120mm. ④Put the prepared alloy strip into the GSL13...

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Abstract

The invention relates to a method for preparing Co-Gd alloy capable of improving soft magnetic performance, which is characterized by comprising the steps of fusing Co with purity of 99.99% and Gd with purity of 99.9% under protection of high-pure Ar gas to obtain alloy; preparing an alloy thin belt from the fused alloy; and placing the prepared alloy stripe into a tubular furnace and introducingAr gas into the tubular furnace, and annealing at 422 to 1175 degrees centigrade. According to the invention, structure regulation and dislocation cancellation occur after the alloy stripe is annealed; the coercive force is reduced; the saturated magnetization intensity is improved; and the soft magnetic performance is enhanced obviously. As a result, it is possible to widely apply the Co-Gd alloy to the magnetostriction field. The method disclosed by the invention has advantages of simple procedures, convenient treatment, quick and convenient forming. Simultaneously, the method solves the application limitation caused by high coercive force and can be widely applied to the magnetostriction field.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and specifically prepares Co-Gd alloy thin strips with different rolling speeds through a single roll, and then anneals the alloy thin strips to prepare materials with good soft magnetic properties. Background technique [0002] Rare earth elements have unique 4f electronic structure, large atomic magnetic moment, strong spin coupling and other characteristics. When forming rare earth compounds with other elements, the coordination number can vary between 6 and 12, and the crystal structure of rare earth compounds It is also varied. Therefore, the rare earth magnetic materials synthesized by using the unique magnetic characteristics such as the spin arrangement of the unpaired 4f electrons of rare earth elements have attracted more and more attention. Its application in rare earth magnetic materials mainly includes: rare earth permanent magnet materials, rare earth magnetostrictive ma...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C19/07C22F1/10
Inventor 姚文静孙文靳增佳王楠
Owner NORTHWESTERN POLYTECHNICAL UNIV
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