Relevance Between Structural Evolution and Magnetic Properties in High Remanence Sm( CobalFe_(0.245)Cu_(0.07)Zr_(0.02))_(7.8) Alloy during Isothermal Annealing Process
Magnetic properties and microstructures of alloys with nominal composition of Sm( CobalFe0. 245Cu0. 07Zr0. 02)7. 8( %,atom fraction) isothermally annealed at 800 ℃ with different annealing time were investigated. The results showed that under the case that the remanence Brof different magnets with different annealing time was basically the same( ~ 1. 15 T),the intrinsic coercivity Hcjof different magnets presented the tendency of gradual increase with the isothermal annealing time increasing from 10 to 40 h...