Rare earth permanent magnet powder, bonded magnet, and device using the bonded magnet

Abstract

The invention discloses rare-earth permanent magnet powder, a bonded magnet and a device with the bonded magnet. The rare-earth permanent magnet powder comprises 4at.%-12at.% of Nd, 0.1at.%-2at. % of C, 10 at.%-25 at.% of N and 62.2 at.%-85.9at.% of T, wherein T is Fe or FeCo, and a hard magnetic phase which is of a TbCu7 structure serves as the main phase of the rare-earth permanent magnet powder. In the process of preparation of the rare-earth permanent magnet powder, material volatilization can be effectively avoided, wettability between the rare-earth permanent magnet powder and a water cooling roller is improved in the process of preparation, and the rare-earth permanent magnet powder which is finally prepared is good in magnetic property.

Description

technical field [0001] The invention involves the field of rare earth permanent magnet materials, especially a kind of rare earth permanent magnet powder, bonding magnet, and device that is applied to the bonding magnet. Background technique [0002] Due to the advantages of good moldability, high size accuracy, and high magnetic performance, rare earth bonding permanent magnets have been widely used in various electronic equipment, office automation, and automobiles, especially in micro -motor. In order to meet the requirements of technology development for miniaturization of equipment, further optimization of the performance of bonding magnetic powder used in the material is needed. [0003] The key to preparing the permanent magnet of the rare earth is the preparation of rare earth permanent magnet powder. The performance of the magnetic powder directly determines the quality and market price of the bonding magnet. The mature bonding rare earth permanent magnet in the ea...

AI Technical Summary

Problems solved by technology

[0005] (1) The vapor pressure of samarium is low, and volatilization is serious during the preparation process, which causes the cost of alloy preparation to be unstable; the volatilized samarium is easy to oxidize, easily catches fire and burns, and easily causes safety accidents; the volatilized samarium clogs the pipeline, causing great damage to the vacuum system. big damage

[0006] (2) The viscosity of samarium alloy is high, and the wettability with the copper wheel is poor during the rapid quenching process, which is easy to cause splashing of the alloy liquid, and the liquid flow on the surface of the rapidly solidified sheet is unstable and the surface is uneven, which in turn causes the unevenness of the alloy phase structure and microstructure , which reduces the magnetic properties of the prepared samarium-iron-nitrogen rare earth permanent magnet powder, which is also the main reason affecting the large-scale application of this material

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