Method of infiltrating metal infiltrating agent to cerium-containing neodymium iron boron magnetic material

A magnetic material, NdFeB technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of poor comprehensive performance of magnets, large amount of heavy rare earth, low coercive force of NdFeB, etc., to improve the coercivity Effects of coercive force, high coercive force and corrosion resistance

Inactive Publication Date: 2014-04-30
赣州诚正稀土新材料股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for improved performance characteristics such as lower coercive force (C), better resistant against environmental stress cracking compared to traditional methods like adding expensive metals during manufacturing processes. By mixing different types of materials together, these techniques help create stronger alloys that provide greater strength without increasing costs associated therewith.

Problems solved by technology

This patented describes methods for improving the properties of rare earth magnets like those based on their compositions. These techniques aim to enhance specific areas where they could help reduce costs while also making them better suited for industrial applications. Specifically, current methods require expensive starting sources and complicated procedures involving multiple steps. Therefore, research efforts focus towards developing simpler ways to make rare earth containing magnets without requiring costly precursory phases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using the dual main phase alloy method, the first main phase is broken by hydrogen, and the Nd with a particle size of 0.35 μm is ground by airflow 30 Fe bal B 1 tm 0.8 , and the mass percentage is 20%.

[0027] Using a thickness of 0.3mm (Ce 0.8 Nd 0.2 ) 30 Fe bal B 1 tm 0.8 Quick-setting tablets, Dy with a particle size of less than 2 μm 80 al 20 For metal penetration agent. Dy 80 al 20 The metallization agent and (Ce 0.8 Nd 0.2 ) 30 Fe bal B 1 tm 0.8 Mix evenly, place in a vacuum furnace, and evacuate to 10 -2 Preheat with low power when the Pa is above, and wait until the vacuum reaches 10 again. -2 Pa above, increase the power to raise the temperature to about 650°C, and wait until the vacuum degree is stable at 10 -2 After the Pa is above, fill high-purity hydrogen to -0.06MPa; increase the power and keep the temperature at 800°C for 6 hours, while maintaining the vacuum in the furnace at -0.04MPa, carry out dysprosium and aluminum infiltratio...

Embodiment 2

[0033] Using the dual main phase alloy method, the first main phase is broken by hydrogen, and the Nd with a particle size of 0.30 μm is ground by airflow 30 Fe bal B 1 tm 0.8 , the mass percentage is 40%;

[0034] Using a thickness of 0.3mm (Ce 0.6 Nd 0.4 ) 30 Fe bal B 1 tm 0.8 (wt%) quick-setting tablets, Dy with a particle size of less than 2 μm 91 al 9 For metal penetration agent. The Dy 91 al 9 The metallization agent and (Ce 0.6 Nd 0.4 ) 30 Fe bal B 1 tm 0.8 (wt%) mix homogeneously, place in the vacuum furnace, vacuum up to 10 -2 Preheat with low power when the Pa is above, and wait until the vacuum reaches 10 again. -2 Pa above, increase the power to raise the temperature to about 600°C, and wait until the vacuum degree is stable at 10 -2 After pa is above, fill in H 2 Mixed gas with argon to -0.06MPa; increase the power and keep the temperature at 880°C for 4 hours, while maintaining the vacuum in the furnace at -0.04MPa, carry out infiltration of...

Embodiment 3

[0040] Using the dual main phase alloy method, the first main phase is broken by hydrogen, and the Nd with a particle size of 0.35 μm is ground by airflow 30 Fe bal B 1 tm 0.8 , the mass percentage content is 50%;

[0041] Using a thickness of 0.35mm (Ce 0.5 Nd 0.5 ) 30 Fe bal B 1 tm 0.8 (wt%) quick-setting tablets, Dy with a particle size of less than 2 μm 80 al 10 Cu 10 For metal penetration agent. Mix the metallizing agent and the cerium-containing NdFeB quick-setting sheet with a weight ratio of 3% and mix them evenly, place them in a vacuum furnace, and evacuate them to 10 -2 Preheat with low power when Pa is above, and wait until the vacuum degree is stable at 10 -2 After pa above, raise the power to about 550°C, fill high-purity argon to -0.07MPa; increase the power to keep the temperature at 780°C for 10 hours, while maintaining the vacuum in the furnace at -0.04MPa, carry out dysprosium infiltration and Aluminum, after being broken by hydrogen, is jet-mi...

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Abstract

The invention discloses a method of infiltrating a metal infiltrating agent to a cerium-containing neodymium iron boron magnetic material. The method comprises the following step: heating under a certain negative pressure condition to infiltrate heavy rare earth of the metal infiltrating agent as well as other alloy elements onto the surface of the cerium-containing neodymium iron boron magnetic material and the crystal boundary thereof by uniformly mixing the RxTM(1-x) metal infiltrating agent and the cerium-containing neodymium iron boron magnetic material, wherein R in RxTM(1-x) represents one or more of elements Dy, Tb and Ho, and TM is one or more of elements Ga, Co, Cu, Nb, Al and Zr; carrying out replacement reaction on the elements Dy, Tb and Ho and Ce, Nd, Pr and Gd and the like in a hard magnetic main phase of the cerium-containing neodymium iron boron magnetic material, and meanwhile, replacing iron in the hard magnetic main phase by the alloy elements Co, Al and the like in the metal infiltrating agent to enhance the coercive force of the cerium-containing neodymium iron boron; and preparing an Nd, Pr, Dy, Tb and Ho-saving cerium-containing neodymium iron boron magnet with higher coercive force and corrosion resistance through a double main phase alloy process on the cerium-containing neodymium iron boron magnetic material infiltrated with dysprosium, terbium and other alloy elements.

Description

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Claims

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Application Information

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Owner 赣州诚正稀土新材料股份有限公司
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