About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Magnetic Materials
|
Presentation Title |
Toughening Sm-Co Sintered Magnets by Additive-modified Microstructure Engineering |
Author(s) |
Baozhi Cui, Xubo Liu, Cajetan Ikenna Nlebedim, Jun Cui |
On-Site Speaker (Planned) |
Baozhi Cui |
Abstract Scope |
Samarium-cobalt (Sm-Co) sintered magnets have high magnetic energy densities, great resistance to demagnetization and corrosion, and excellent thermal stability. However, the utilization of these magnets is restricted by their brittleness. Based on the micromechanical and the Zener pinning model, Sm-Co sintered magnets with improved mechanical properties have been designed and fabricated via an additive-modified microstructure engineering. A small amount of fine Sm2O3 particulates has been incorporated into Sm2(CoFeCuZr)17 sintered magnets to refine the grain size by up to approximately 50% and narrow the grain size distribution. Doping with 3 wt% Sm2O3 increased the flexural strength by 62% while maintaining magnetic performance. Micromechanical simulation indicates that the fracture is dominated by intragranular mode. The mechanical strength is mainly enhanced by the additive-induced grain refinement, while the small amount of Sm2O3 addition has little direct effect on mechanical properties. These magnets will be more cost-effective, efficient, and robust for various functional applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Mechanical Properties, Modeling and Simulation |