| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thin Films and Coatings: Properties, Processing and Applications
|
| Presentation Title |
Linking Pt-Au Alloy Composition and Surface Mechanocatalytic Activity |
| Author(s) |
Filippo Mangolini, Camille E. Edwards, Tomas F. Babuska, John F. Curry, Frank W. DelRio, Jason P. Killgore, Hsu-Ming Lien, Brad L. Boyce, Michael T. Dugger |
| On-Site Speaker (Planned) |
Filippo Mangolini |
| Abstract Scope |
Nanocrystalline Pt-Au alloys have emerged as a promising class of hard and wear-resistant thin film materials for various applications, including electrical contacts and electromechanical devices. While the formation of carbonaceous surface layers on Pt-Au alloys has been reported to decrease friction in tribological tests carried out with different countersurface materials, remarkably little is still known about their chemistry/structure and the interrelationship between alloy composition and surface mechanocatalytic activity. Here, we employed four different Pt-Au alloys ([Au] from 0 at.% to 10 at.%) to perform contact pressure-dependent tribological experiments in nitrogen gas containing trace organics. The results of the multi-technique analytical characterization of the mechanocatalytically-formed, carbon-rich surface layers did not only shed light on their chemical composition and local atomic structure, but also revealed insights into the dependence of the mechanocatalytic activity of Pt-Au alloys on the Au content. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Characterization, Surface Modification and Coatings |