Grain Boundary Diffusion (GBD) in permanent magnets is the process of distributing heavy rare-earth elements into the intergranular material that is wrapped around the grains of a sintered magnet. The end-goal is to increase the coercivity (resistance to demagnetization) of the magnet without compromising its induction (magnetic strength).

2025年1月15日 · Sintered Nd-Fe-B magnets industrially produced employing the grain boundary diffusion process (GBD) were recycled by the so-called functional or short-loop recycling approach, based on hydrogen decrepitation (HD).

2025年2月15日 · Research has demonstrated that the GBD technique is a promising approach for enhancing the coercivity of RE-Fe-B sintered magnets. This method achieves a significant increase in Hcj with minimal consumption of heavy rare earth (HRE) elements while maintaining remanence (Br) and (BH) max with minimal degradation [[23], [24], [25]].

2021年9月10日 · The grain boundary diffusion (GBD) process provides the best route to fabricate high-coercive Nd-Fe-B magnets with low consumption of expensive HRE resources. Here we give a special review on the grain boundary diffusion sources and their coating methods.

Grain Boundary Diffusion (GBD) in permanent magnets is the process of distributing heavy rare-earth elements into the intergranular material which is wrapped around the grains of a sintered magnet. This process increases the coercivity (Resistance to demagnetization) of the magnet without compromising the induction strength (Br) of the magnet.

Discover Tongchuang's advanced Grain Boundary Diffusion (GBD) technology, designed to enhance the magnetic properties of neodymium magnets. Our GBD process improves coercivity, heat resistance, and overall magnet performance while maintaining cost-efficiency.

2023年2月27日 · Grain boundary diffusion (GBD) is an effective process to enhance coercivity for Nd–Fe–B magnets with relatively low consumption of expensive heavy rare earths (HREs). For conventional GBD, the surface of the magnet is evenly covered by diffusion source, followed by diffusion heat treatment.

2023年5月1日 · Grain boundary diffusion (GBD) process is an important approach for producing Nd-Fe-B magnets with high coercivity and high thermal stability. The GBD for hot-deformed Nd-Fe-B magnets with nanocrystalline microstructure …

A promising approach to achieve this goal is the grain boundary diffusion process, also known as the GBD process. In this newly introduced production process, the intrinsic coercive field strength H cJ of NdFeB magnets can be significantly increased:

2021年9月10日 · The grain boundary diffusion (GBD) process provides the best route to fabricate high-coercive Nd-Fe-B magnets with low consumption of expensive HRE resources.