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Preparation method of samarium-cobalt permanent magnet material with ceramic layer

A technology of permanent magnet material and ceramic layer, applied in the direction of magnetic material, inorganic material magnetism, magnetic object, etc., can solve the problems of easy rust and corrosion, affecting the service life of samarium cobalt alloy permanent magnet material, and decreasing the magnetic performance, etc. The effect of corrosion resistance

Inactive Publication Date: 2018-01-19
SUZHOU NANER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the active nature of samarium-cobalt alloy, the corrosion resistance of the whole samarium-cobalt alloy becomes very poor, especially in hot and humid environment, it is easy to rust and corrode, and the magnetic properties will be reduced or damaged due to corrosion failure, which seriously affects The service life of the samarium-cobalt alloy permanent magnet material is shortened, and the stability and reliability of the product are reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The samarium cobalt permanent magnet material main body of the present embodiment is by following composition by general formula: Sm(Co 0.97 Ti 0.03 ) 4.8 Si 0.2 .

[0019] According to the above general formula, each element is weighed for batching; the batching is placed in the melting furnace, and the vacuum in the furnace reaches at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 50kPa; heat up to 1300°C to melt, stir, refine and cast into water-cooled copper molds for use.

[0020] The obtained alloy ingot is crushed, put into the quartz tube in the vacuum belt throwing machine, the diameter of the nozzle at the bottom of the quartz tube is 0.5 mm, after the chamber of the vacuum belt throwing machine is evacuated, the cavity is filled with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance between the nozzle at the bottom of the ...

Embodiment 2

[0024] The samarium cobalt permanent magnet material main body of the present embodiment is by following composition by general formula: Sm(Co 0.9 Ti 0.1 ) 4.5 Si 0.5 .

[0025] According to the above general formula, each element is weighed for batching; the batching is placed in the melting furnace, and the vacuum in the furnace reaches at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 80kPa; heat up to 1450°C to melt, stir, refine, and then cast it into a water-cooled copper mold for use.

[0026] The obtained alloy ingot is crushed and put into the quartz tube in the vacuum strip machine. The diameter of the nozzle at the bottom of the quartz tube is 0.8mm. After the cavity of the vacuum strip machine is vacuumed, fill the cavity with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance from the nozzle at the bottom end of the quartz tube ...

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Abstract

The invention discloses a preparation method of a samarium-cobalt permanent magnet material with a ceramic layer. Through the preparation method, components of SmCo5 alloy are adjusted through dopingto obtain high alloy component supercooling degree, and a high-speed rapid-quenching technology is adopted to obtain small-grain-size anisotropic SmCo5. The preparation method has the advantages thatthrough surface treatment, the samarium-cobalt alloy is highly resistant to corrosion, ultra-low in magnetism reduction and resistant to impact.

Description

technical field [0001] The invention relates to the field of magnetic material manufacture, in particular to a preparation method of a samarium cobalt permanent magnet material with a ceramic layer. Background technique [0002] Rare earth permanent magnet materials refer to permanent magnet materials made of alloys formed of rare earth metals and transition metals through a certain process. Rare earth permanent magnet material is the permanent magnet material with the highest comprehensive performance known now, which is more than 100 times higher than the magnetic properties of the magnetic steel used in the 90th century, much superior to ferrite and AlNiCo, and more than The magnetic properties of expensive platinum-cobalt alloys are twice as high. Due to the use of rare earth permanent magnet materials, it not only promotes the miniaturization of permanent magnet devices and improves the performance of products, but also promotes the production of some special devices. ...

Claims

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Application Information

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IPC IPC(8): H01F1/055H01F1/08B22D11/06
Inventor 不公告发明人
Owner SUZHOU NANER MATERIAL TECH CO LTD
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