Because of its excellent magnetic properties and high cost performance, NdFeB permanent magnetic materials have rapidly become the leader in the rare earth permanent magnet market since its inception. Its output value accounts for 90% of the world's output value of rare earth permanent magnetic materials. With the continuous improvement of preparation technology and production technology, its various properties are constantly improved, and its application fields are gradually expanding. Therefore, the application of NdFeB permanent magnetic materials has become a symbol of the level of modernization, and NdFeB permanent magnetic materials are still the sunrise industry in the rare earth materials industry.

Neodymium iron boron permanent magnet material is based on intermetallic compound re2fe14b. The main components are neodymium (nd), iron (FE) and boron (b). Among them, the main rare earth element is neodymium (nd). In order to obtain different properties, some other rare earth metals such as dysprosium (Dy) and praseodymium (PR) can be partly replaced by other metals such as cobalt (CO), aluminum (AL). The content of boron is small, but it plays an important role in the formation of tetragonal intermetallic compounds, which makes the compounds have high saturation magnetization, high uniaxial anisotropy and high Curie temperature.

HCVAC vacuum has developed an equipment for depositing TB, Dy and their alloys by magnetron sputtering for NdFeB. The coating thickness can reach 3-18um, which greatly improves the coercivity of NdFeB magnets and significantly reduces the production cost.