High-temperature-resistant samarium-cobalt permanent magnet and preparation method thereof

• Main Authors: LIU WEI, DENG YUAN, DU ZHENYU, LI YANLI, MENG LIJUAN, HAO XIAOLONG, LIU GAZHEN
• Format: Patent
• Language: Chinese; English
• Published: 06.01.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

The invention discloses a high-temperature-resistant samarium cobalt permanent magnet and a preparation method thereof, and the magnet comprises the following components in percentage by weight: SmuGdvCowCuaZrbTicFed, in which u is equal to 19.4%-23.92%, v is equal to 1.41%-3.76%, w is equal to 34.44%-51.28%, a is equal to 5.3%-11.32%, b is equal to 2.91%-4.6%, c is equal to 0.3%-0.8%, and the balance is d. The alloy is prepared through the steps of alloy smelting and sheet casting, hydrogen decrepitation, jet milling, orientation forming, isostatic pressing, sintering, solution treatment and aging treatment, the method is simple, the process is easy to control, and the prepared high-temperature-resistant samarium-cobalt permanent magnet achieves the magnetic performance at the temperature of 550 DEG C: Hcj is larger than or equal to 7.5 kOe, (BH) max is larger than or equal to 9 MGOe, and BH < max > is larger than or equal to 9 MGOe. The problems that the magnetic performance of an existing samarium-cobalt m