| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Aging and Compatibility: Experimental and Computational Approaches to Enable Lifetime Predictions
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| Presentation Title |
Characterization of localized oxidation in tantalum and cracking susceptibility at high temperatures using Auger Electron Spectroscopy |
| Author(s) |
Mila Nhu Lam |
| On-Site Speaker (Planned) |
Mila Nhu Lam |
| Abstract Scope |
Tantalum is broadly used due to its superior corrosion and temperature resistance, workability, and ductility. Oxygen exposure at high temperatures causes cracking in Ta and Ta alloys, resulting in mechanical failure. However, the mechanisms of oxidation and cracking are not well understood. Here, Auger electron spectroscopy (AES) is performed to characterize local oxidation behavior of tantalum to elucidate fundamental mechanisms of oxygen-based aging and damage. AES is a powerful quantitative technique for chemical surface analysis with high spatial resolution (<10nm lateral/depth) enabling the selective removal of the thin native surface oxide and quantification of local oxygen content. AES is conducted on Ta and Ta-10W for various temperatures along with complementary X-ray photoelectron spectroscopy (XPS) to understand specific oxidation states. These results improve understanding of the relationship between cracking susceptibility and oxygen content during accelerated thermal aging.
Sandia National Laboratories is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, |