About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Characterization of Surface Oxidation and Multi-phase Nanocrystallization in Soft Magnetic FeNi-based Metal Amorphous Nanocomposite Alloys |
Author(s) |
Paul R. Ohodnicki, Kevin Byerly, John Baltrus, Ruishu Wright, James Egbu, Natan Aronhime, Yuval Krimer, Michael McHenry, Elizabeth Kautz, Arun Devaraj |
On-Site Speaker (Planned) |
Paul R. Ohodnicki |
Abstract Scope |
Recent work has demonstrated significant improvements in mechanical properties of emergent high performing Co-rich and FeNi-based soft magnetic metal amorphous nanocomposite (MANC) alloys comprised of close packed (e.g. fcc) nanocrystals embedded within an amorphous matrix. Optimized FeNi-based alloys show high saturation induction and permeability as well as enhanced ductility, making them attractive for post-processing operations such as stamping of laminations for high-speed rotating electrical machinery. Formation of an adherent surface oxide layer is also believed to provide the necessary inter-laminate electrical insulation required to mitigate eddy current losses without the need for additional coatings or surface treatments. In this work, we present characterization of MANC alloys via complementary electron microscopy, atom probe tomography, and x-ray photoelectron spectroscopy. With this multimodal approach, we explore the detailed nature of the surface oxidation layer as well as the composition and structure of nanocrystals that form within the bulk during for optimized annealing treatments. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |