| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Laser Processing of Ce-Based Permanent Magnets to Support the Domestic Magnet Supply Chain |
| Author(s) |
Alfred Amon, Eunjeong Kim, Alexander Wilson-Heid, Alexander Baker |
| On-Site Speaker (Planned) |
Alfred Amon |
| Abstract Scope |
Permanent magnets based on the cheap and abundant rare earth metal cerium are attracting renewed interest, as projections for demand growth exceed the expected supply of neodymium-based magnets. Promising magnetic performance has been demonstrated for Ce containing magnets based on the ThMn12-type intermetallic phase in thin films and powders, but manufacturing of bulk magnets, essential for commercialization, remains a major obstacle. The thermodynamic instability of these materials results in a narrow window of processing conditions and has hitherto prevented the realization of optimum performance. We have investigated the suitability of laser powder bed fusion for the preparation of bulk magnets. Mapping the phase stability vs. composition enabled a better understanding of microstructure control. Special attention was paid to the role of substitutional and interstitial dopants on the phase stability and magnetic properties. Work performed at LLNL under contract DE-AC52-07NA27344. |