GB/T 46763-2025: Evaluation method for grain boundary diffusion result of sintered rare earth iron boron permanent magnets

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Scope

This document describes the evaluation method for the magnetic properties and
diffusion element content of grain boundary diffusion result of sintered rare earth iron
boron permanent magnets.
This document applies to the evaluation of heavy rare earth grain boundary diffusion
result in sintered rare earth iron boron permanent magnets using the upper and lower
surfaces or multiple surfaces.
NOTE. Application recommendations for the evaluation method for grain boundary diffusion are
provided in Annex A.

Basic Data

Standard ID	GB/T 46763-2025 (GB/T46763-2025)
Description (Translated English)	Evaluation method for grain boundary diffusion result of sintered rare earth iron boron permanent magnets
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H14
Classification of International Standard	77.120.99
Word Count Estimation	14,163
Date of Issue	2025-12-02
Date of Implementation	2026-07-01
Issuing agency(ies)	State Administration for Market Regulation, Standardization Administration of China