About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Effect of Alloying Elements on Surface Oxidation Behavior of Gas-Atomized Ni-Based Powders |
| Author(s) |
Dae-Hyeon Kim, May Likha Lwin, Geon-woo Baek, Hyunjoong Kim, Jaehyeok Sim, Jiwoon Lee, Ho Jin Ryu, Soon-Jik Hong |
| On-Site Speaker (Planned) |
Dae-Hyeon Kim |
| Abstract Scope |
This study examines the influence of alloying elements on the surface oxidation behavior of gas-atomized Ni-Cr-Al and Ni-Cr-Al-Fe (Haynes 214 grade) powders, with relevance to powder metallurgy and additive manufacturing. Surface analyses via X-ray Photoelectron Spectroscopy (XPS) and Auger Electron Spectroscopy (AES) revealed that Fe addition significantly modifies the oxidation mechanism by suppressing Al₂O₃ formation and stabilizing a thin, uniform Ni–Cr-rich oxide layer. In contrast, the Fe-free Ni-Cr-Al powders showed rougher surfaces with localized Al₂O₃ particulates (~2 nm), indicating uneven oxidation. High-temperature oxidation (~1150 °C) resulted in protective Cr₂O₃ and spinel layers in both powders, but Al diffusion and oxide thickening were more pronounced in Ni-Cr-Al. The results underscore the synergistic role of Cr and Al in forming protective oxides, while highlighting Fe’s role in enhancing surface stability. These findings offer insight into alloy design for improving oxidation resistance and thermal performance in Ni-based powder systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, High-Temperature Materials, Powder Materials |