About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Magnetic Materials
|
Presentation Title |
Mechanochemical Synthesis of Magnetostrictive Materials: Ce-doped Galfenol and Alfenol |
Author(s) |
Alexander Baker, Alfred Amon, Jibril Shittu, Hunter Henderson, Emily Moore, Scott McCall |
On-Site Speaker (Planned) |
Alexander Baker |
Abstract Scope |
Magnetostrictive materials such as FeGa (Galfenol) and FeAl (Alfenol) provide high precision solid-state sensing capabilities, with applications in magnetic field sensing, load cells, or tunable inductor circuits. The magnetostrictive effect can be enhanced through addition of rare earths such as Ce, but CeGa2 formation above ~0.01 at. % Ce limits these gains. Here we present a combination of nonequlibrium methods, mechanical alloying and laser powder bed fusion, that circumvent this limitation and allow greater design flexibility than bulk processing. We find that the mechanical alloying allows up to 0.5 at. % Ce addition without CeGa2 formation, resulting powders are amenable to pressing and sintering to near-full density, and usable as feedstock for additive manufacturing. A comprehensive study of doping and fabrication parameters will be presented, focusing on phase formation and its effects on magnetostriction, as well as opportunities presented by near-net shape fabrication.
Prepared by LLNL under Contract DE-AC52-07NA2 |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Other, |