| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2021
|
| Presentation Title |
In Situ Study of High Temperature Oxidation of Alloys Using Ambient Pressure X-ray Photoelectron Spectroscopy |
| Author(s) |
Richard P. Oleksak, John P. Baltrus, Tao Liu, Rafik Addou, J Trey Diulus, Gregory S. Herman, Bharat Gwalani, Arun Devaraj, Ömer N. Doğan |
| On-Site Speaker (Planned) |
Richard P. Oleksak |
| Abstract Scope |
Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) is a relatively new technique that enables analysis of the composition and chemical environment of a material surface under relatively high gas pressures (>1 mbar). When combined with a heating stage, this allows for study of high-temperature surface reactions in situ. While AP-XPS has been applied extensively to study many types of functional materials, it has received little attention for what appears to be an obvious application in the realm of structural materials: high-temperature oxidation of alloys. Herein we present AP-XPS results of chromia-forming model alloys exposed to O2, low-purity CO2, and high-purity CO2 at 1 mbar and temperatures up to 530 °C. Post-exposure TEM and APT were also used to provide complementary analysis of the oxidized surfaces at the near-atomic scale. The results are discussed with emphasis on the oxidation mechanisms revealed by AP-XPS that were inaccessible by other existing characterization techniques. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Thin Films and Interfaces, Characterization |