About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Magnetic Materials
|
Presentation Title |
Crystallization Characteristics in Co-based Magnetic Amorphous Nanocomposites |
Author(s) |
Alicia Koenig, Ronald Noebe , Alex Leary, Claudia Mewes , Tim Mewes, Gregory B. Thompson |
On-Site Speaker (Planned) |
Gregory B. Thompson |
Abstract Scope |
The partial crystallization of amorphous Co(78-x)Fe2MnxB14Si2Nb¬4 (x = 0.5 and 6.0%) alloys have promise for use in high-power electronic systems. The chemical partitioning behavior of the various species is critical to the overall magnetic response. Using TEM and atom probe, this partitioning is quantified through a series of annealing treatments at 400 deg. C from 10 minutes up to 6 hours. Annealing up to 2 hours reveal the continuous precipitation of Co-rich nanocrystallites (≈ 3 – 5 nm), with little change in crystal structure, morphology, and chemical partitioning behavior as a function of either anneal time or alloy content. Short range ordering reveals a modification of the second nearest neighbor bonding in these crystallites that is explained by the metastable incorporation of Fe in these precipitates. For the Mn 0.5% and Mn 6.0% alloy at 3 hours and 6 hours, respectively, secondary precipitation of Mn3(Co10B3)2 was found. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Magnetic Materials, Phase Transformations |