About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Heterogeneous Sm-Co Sintered Magnets with Enhanced Mechanical Properties |
Author(s) |
Baozhi Cui, Xubo Liu, Gaoyuan Ouyang, Cajetan I. Nlebedim, Jun Cui |
On-Site Speaker (Planned) |
Baozhi Cui |
Abstract Scope |
SmCo5 and Sm2Co17 type sintered magnets have been widely used in telecommunication, sensors, and energy conversion, especially, at elevated temperatures of 200 - 550 oC. Though Sm-Co sintered magnets possess excellent magnetic properties, they are brittle. The brittleness limits their applications and also leads to magnet production loss up to 20-30%. Improving flexural strength or fracture toughness of Sm-Co magnets is of great scientific and technical significance.
This work studied the formation of novel heterogeneous grain microstructures and their strengthening mechanisms in Sm-Co sintered magnets. Flexural strength or fracture toughness values of Sm2(CoFeCuZr)17 sintered magnets were enhanced by about 50-75 % while excellent magnetic properties were maintained. The results showed that engineering grain microstructures, without changing the chemical compositions of magnets and heat treatment procedures, was an effective way to achieve an unprecedented combination of superior mechanical and magnetic properties in Sm-Co sintered magnets. |
Proceedings Inclusion? |
Planned: |