MANUFACTURING PROCESS FOR A COST-EFFECTIVE RARE EARTH MAGNET
Patent Information
- Application Number
- DE602022016017
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-09-24
- Filing Date
- 2022-09-22
- Publication Date
- 2025-06-18
- Estimated Expiration
- 2042-09-22
AI Technical Summary
The high cost of heavy rare earth elements such as terbium (Tb) and dysprosium (Dy) in NdFeB sintered permanent magnets, and the challenge of reducing the content of these elements while maintaining magnetic performance.
A method for preparing high-coercivity sintered NdFeB magnets that includes cerium (Ce) by using alloy flakes, a low melting point powder, and a diffusion source, followed by hydrogen embrittlement, jet milling, magnetic field orientation molding, sintering, and aging to reduce the content of heavy rare earths and lower production costs.
The method significantly increases the coercivity of the NdFeB magnets, improves high-temperature resistance, and reduces production costs by minimizing the use of expensive heavy rare earths, while maintaining the magnetic performance comparable to pure Tb metal diffusion effects.