| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Complex Antiphase Boundaries As a Means to Two-phase Coexistence in Ordered Fe-Pd Alloys |
| Author(s) |
Adrian Savovici, Yongmei Jin, William Soffa, Jerrold A. Floro |
| On-Site Speaker (Planned) |
Jerrold A. Floro |
| Abstract Scope |
Fe-Pd exhibits L10 + L12 coexistence near 62 at% Pd, where exchange coupling between ferromagnetic phases is possible. L10 is a tetragonal ordered phase with high magnetocrystalline anisotropy and L12 is a cubic ordered phase. Aging of A1 in this composition range promotes complete transformation to L12, followed by formation of L10 polytwin structure. For relatively low Pd content, the L12 coexists as coherent layers wetting all polytwin and antiphase boundaries (APBs). At higher Pd content, a contiguous L12 matrix surrounds the L10 polytwin plates, but the internal wetting layers persist. The structure of the L10/L12 APB is complex, forming layered channels with multiple internal interfaces. The channels bridge the L10 twins bounding the central twin that contains the APB, and we show that channels can be ‘open’ or ‘closed’ depending on the relative translation vectors of the twins. National Science Foundation support through grant DMR-1709914 is gratefully acknowledged. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Magnetic Materials, Characterization |