METHOD FOR PRODUCING RFeB-BASED MAGNET, AND ALLOY FOR GRAIN BOUNDARY DIFFUSION PROCESS USED IN THE METHOD
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United States of America
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Issued Date -
Nov 28, 2024
app pub date -
May 17, 2024
filing date -
May 17, 2024
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Abstract
The present invention relates to a method for producing an RFeB-based magnet, the method including: a base material preparation step of preparing a base material made of a sintered body of an RFeB-based alloy or a hot-deformed body of the RFeB-based alloy; an adhesion substance preparation step of preparing an adhesion substance containing an RHdCu alloy that includes Cu and a heavy rare earth element RHd to be diffused and that has a content of Cu of 20 mass % or more and 40 mass % or less; an adhesion step of adhering the adhesion substance to a surface of the base material; and a heating step of heating the base material to which the adhesion substance has been adhered to a predetermined temperature at which the heavy rare earth element RHd to be diffused is diffused into the base material through a grain boundary of the base material.
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