Microstructural control is central to the performance of sintered NdFeB magnets. Grain size refinement, phase distribution, and grain boundary chemistry directly influence intrinsic coercivity and thermal resistance. Advanced techniques such as grain boundary diffusion using heavy rare-earth elements are employed to enhance high-temperature performance while minimizing overall rare-earth usage, balancing performance requirements with material efficiency and cost considerations.

Due to their high neodymium content, sintered NdFeB magnets are inherently susceptible to oxidation and corrosion. Surface engineering is therefore an essential component of product design. Protective coatings including nickel, zinc, epoxy, and multilayer composite systems are applied to improve environmental resistance and ensure reliable operation in harsh industrial conditions.

Sintered NdFeB magnets are extensively utilized in electric vehicle drive systems, wind turbine generators, industrial automation equipment, medical devices, and high-efficiency motors. Their ability to deliver strong, stable magnetic fields supports system miniaturization, energy efficiency, and enhanced functional performance.

By integrating advanced materials science with precision manufacturing and continuous process optimization, sintered NdFeB magnets have become a strategic enabling technology for next-generation electromechanical and energy conversion systems.