School of Materials Science and Engineering;
South China University of Technology;
Guangzhou 510640;
China;
Guangdong Provincial Key Laboratory of Rare Earth Development and Application;
Institute of Rare Met.;
Guangdong Academy of Sciences;
Guangzhou 510650;
China;
School of Materials Science and Engineering;
Nanchang Hangkong University;
Nanchang 330063;
China;
Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices(IREMMD)/College of Rare Earths;
Jiangxi University of Science and Technology;
Ganzhou 341000;
China;
Nd-Fe-B magnets; Grain boundary diffusion process; Non-rare earth; Coercivity; Corrosion resistance;