| Abstract Scope |
The fabrication of neodymium-iron-boron (NdFeB) magnets is a complex, multistep process. It begins with the production of rare earth metals, along. These materials are alloyed with iron, boron, then strip-cast. The alloy is then converted to powder, which is formed into a magnet.
Chemical purity is essential to both magnet performance and manufacturability. Transition metals must be carefully controlled. Some elements enhance the
coercivity, some are added to influence microstructure. At the same time, impurities including high-vapor-pressure elements such as chlorine (Cl) can disrupt equipment operation.
The paper compares relevant standards with specification sheets from domestic producers. It also reviews standard analytical methods for rare earth metals, including techniques used to measure oxygen, carbon, and transition metal content.
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