Manufacture of near-net shape rare-earth permanent magnet used for electric traction motor for e.g.

文件类型：PDF文档
文件大小：421K
Method for near net shape forming a rare earth permanent magnet and a permanent magnet. The method comprises that a powder of a magnetic material is introduced in a tool, the tool is closed, and the powder is sintered impact-consolidated and the compacted magnetic powder is in the tool, so as to form the rare earth-permanent magnet part. The in-mold is the magnetic material, which is subjected to a compaction, a mixture, of two or more different precursors of a powder of a magnetic material. Additional materials may be added to the mixture. Additional material may be a lubricant Such a, so as to reduce the likelihood of break formation may be necessary to provide, while another a coating, by a protection against oxidation of the mixture. It may also either before or in connection with the evacuation or inert environments sintering or similar high-temperature section of the process are used.