| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics and Kinetics of Alloys III
|
| Presentation Title |
Mechanisms of tribolayer breakdown during frictional ignition in high-pressure oxygen |
| Author(s) |
Andres Garcia Jimenez, Zachary C. Cordero |
| On-Site Speaker (Planned) |
Andres Garcia Jimenez |
| Abstract Scope |
Frictional heating at metallic sliding contacts in high-pressure oxygen can result in catastrophic metal fires. This phenomenon, termed frictional ignition, has been linked to breakdown of an oxide tribolayer that forms in situ at sliding surfaces. This talk summarizes our recent investigation on the mechanisms of tribolayer breakdown and its role in frictional ignition. Through high-speed sliding experiments, ex situ characterization of the tribolayers, and physics-based modeling of the thermodynamics and kinetics of oxidational wear, we determined two distinct mechanisms of tribolayer breakdown: Melt-driven tribolayer breakdown due to melting of either the underlying metal or the oxide, and mechanically-driven tribolayer breakdown. The dominant mechanism depends on test conditions. We use our insights to develop an ignition model that predicts the conditions under which each mechanism dominates, revealing the effects of material chemistry, operating conditions, and component geometry on ignition behaviors. These results suggest guidelines for selecting and designing ignition-resistant systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Characterization, Modeling and Simulation |