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

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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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.