|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Magnetic Materials: An FMD Symposium in Honor of Michael E. McHenry
||Comparison of Grain Boundary Diffusion Processes (GBDP) in Nd-Fe-B Permanent Magnets
||Oliver Gutfleisch, Simon Sawatzki, Konrad L÷we, Christoph Schw÷bel, Tim Helbig
|On-Site Speaker (Planned)
Nd-Fe-B permanent magnets are used as essential components of energy applications. Heavy rare earths (HRE) are added to enable high temperature usage. As a consequence, magnetization as well as energy product are decreasing. The grain boundary diffusion process (GBDP) can overcome this problem for smaller sized magnets; the HRE is first deposited by physical, chemical or electrochemical techniques onto the magnet┤s surface and then diffused into the magnet by post-sintering annealing. We carried out a comparison of different GBDP routes for the efficient utilization of the HRE. Novel coating techniques and materials were applied to sintered and nanocrystalline hot compacted magnets. Binary and ternary low melting eutectics based on Dy, Tb, Nd or a mix of them have been explored. In addition, we coated the particles prior to hot compaction. An assessment of temperature dependent magnetic properties and in-situ magnetic force microscopy at different magnetic fields were done.
||Planned: None Selected