| About this Abstract |
| Meeting |
2011 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnetic Materials for Energy Applications
|
| Presentation Title |
Novel Approaches to Microstructural Characterisation in NdFeB Materials |
| Author(s) |
Thomas G. Woodcock, Nora M Dempsey, Dominique Givord, Stefan Zaefferer, Oliver Gutfleisch |
| On-Site Speaker (Planned) |
Thomas G. Woodcock |
| Abstract Scope |
NdFeB sintered magnets have recently found important new applications in electric motors for hybrid electric vehicles and generators for wind turbines. Magnet grades with Dy additions are typically used for such applications and this incurs a significant cost penalty. Much research effort has therefore recently been put into reducing the Dy content or eliminating Dy in NdFeB sintered magnets for high temperature applications. In addition to various experimental routes toward this, novel approaches yielding detailed microstructural characterisation are required in order to bring greater understanding of coercivity mechanisms. Recent developments include the use of aberration-corrected TEM to obtain highest spatial resolution images and the application of electron backscatter diffraction (EBSD) to obtain crystallographic orientation data on a local scale from all the phases present in the microstructure. The combination of EBSD and EDX with high resolution serial sectioning yields 3D orientation and chemical data which will also be discussed. |
| Proceedings Inclusion? |
Planned: A CD-only volume |