About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
New Frontiers in Physical Metallurgy of Steels
|
| Presentation Title |
Influence of Final Annealing Atmosphere on Surface Microstructure and Core Loss in Non-Oriented Fe-Si Alloy |
| Author(s) |
Jiheon Jeon, So-Hyeon Lee, Seonghyeon Yoo, Yongkeun Ahn, ChunGu Kang, Ju-Young Kim |
| On-Site Speaker (Planned) |
Jiheon Jeon |
| Abstract Scope |
Reducing core loss in Fe–Si alloys is essential for improving electric motor efficiency. While bulk microstructural factors such as texture and grain size are well known to influence core loss, the role of surface microstructures formed during final annealing has received less attention. The annealing atmosphere induces surface reactions that affect microstructure formation, and non-uniform surface features can hinder domain wall motion and increase core loss.
In this study, the effect of annealing atmosphere on surface microstructure evolution was investigated by controlling the H₂/N₂ gas ratio. Surface morphology and chemistry were analyzed using SEM, TEM, EBSD, and XPS. Core loss was measured using a Single Sheet Tester (SST). The results reveal a direct correlation between annealing atmosphere and surface microstructure, demonstrating that atmosphere control is an effective strategy for reducing core loss. |