Grain Boundary Diffusion (GBD) increases the Coercivity of Neodymium magnets while conserving the Remanence (Br) due to the unique grain structure of Neodymium magnets. HREE Dysprosium (Dy) and Terbium (Tb) have been used for decades in the manufacture of Neodymium magnets.

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2月15日 · In the conventional grain boundary diffusion (GBD) process, heavy rare earth elements such as Dy and Tb—either as metals, alloys, or compounds—are applied to the surface of sintered Nd-Fe-B magnets and subsequently diffused into the grain boundaries.

1 天前 · The grain boundary diffusion (GBD) method is an effective way to enhance the H cj of Nd-Fe-B magnets through the formation of (RE, Dy/Tb) 2 Fe 14 B phase shells with high H A around the main phase grains by diffusion of the heavy RE element Dy/Tb [17], [18], [19], [20].Similarly, the H cj of (Nd, Ce)-Fe-B magnets could be …

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]].

GBD magnets are an environmentally friendly solution. One of the main topics in global permanent magnet research is the reduction of HRE, without degrading the performance of NdFeB permanent magnets, but rather improving them. A promising approach to achieve this goal is the grain boundary diffusion process, also known as the GBD process.

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.

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.

GBD magnets are an environmentally friendly solution. One of the main topics in world-wide permanent magnet research is the reduction of HRE, without thereby impairing the performance of NdFeB permanent magnets, but rather to improve it further.