About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Effects of Grain Size on Magnetic and Mechanical Properties of NdFeB Sintered Magnets |
Author(s) |
Wei Tang, Gaoyuan Ouyang, Baozhi Cui, Matt J Kramer, Jun Cui, Iver E Anderson |
On-Site Speaker (Planned) |
Wei Tang |
Abstract Scope |
High-efficiency electric drive permanent magnet motors with exceptional powder density require the permanent magnets to have high magnetic and mechanical properties, thermal stability and low cost. Currently, Nd2Fe14B-based sintered magnets are one of the promising candidates if heavy rare earth (HRE)-free magnets with high coercivity (HC) and mechanical properties are well achieved. In this work, the effect of grain size on HC and mechanical strength of Dy-free NdFeB sintered magnets was fully studied. Three sintered magnet I, II and III were made respectively by the powders with three different particle sizes under the same sintering and heat treatment conditions. Magnet I, II and III obtained an intrinsic HC of 10.1, 11.3 and 9.1 kOe, respectively. The average flexure strength of magnet I, II and III is 262, 211 and 234 MPa, respectively. These results show that the HC increases but the flexure strength decreases with reduction of grain size. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |