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What is NdFeB infiltrating dysprosium terbium technology

Since the advent of NdFeB permanent magnet materials in the 1980s, they have been widely used in automobiles, wind power, aerospace, military and other fields with their excellent magnetic properties. In recent years, the demand for wind power generation and new energy vehicles has been increasing. This places higher requirements on the coercivity and temperature stability of NdFeB permanent magnet materials.

Because the magnetocrystalline anisotropy field of the Dy2Fe14B phase is much stronger than that of the Nd2Fe14B phase, and the Curie temperature is relatively high, the coercivity and temperature stability of the material can be greatly improved. In the sintered NdFeB material, the content of dysprosium is very high, and some can reach more than 10%. We all know that the heavy rare earth element dysprosium and terbium is expensive, and a large amount of addition will increase the production cost of NdFeB. Therefore, how to reduce the amount of dysprosium and terbium under the premise of ensuring high coercivity and temperature stability has become an important issue.