How Hydrogen and Oxygen Vapor Affect the Tribochemistry of Silicon- and Oxygen-Containing Hydrogenated Amorphous Carbon under Low-Friction Conditions: A Study Combining X-ray Absorption Spectromicroscopy and Data Science Methods
| Autor: | Komlavi D. Koshigan, Mark Hilary Van Benthem, Robert W. Carpick, J. B. McClimon, James Hilbert, Filippo Mangolini, James Anthony Ohlhausen, Julien Fontaine |
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| Přispěvatelé: | The University of Texas at Austin, Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS), Sandia National Laboratories [Albuquerque] (SNL), Sandia National Laboratories - Corporation, Department of Mechanical Engineering and Applied Mechanics [University of Pennsylvania] (MEAM), School of Engineering and Applied Science [University of Pennsylvania], University of Pennsylvania [Philadelphia]-University of Pennsylvania [Philadelphia] |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Silicon Hydrogen chemistry.chemical_element [CHIM.MATE]Chemical Sciences/Material chemistry 02 engineering and technology Tribology 021001 nanoscience & nanotechnology Oxygen XANES [SPI.MAT]Engineering Sciences [physics]/Materials 020303 mechanical engineering & transports 0203 mechanical engineering X-ray photoelectron spectroscopy chemistry Amorphous carbon Chemical engineering [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] General Materials Science 0210 nano-technology Absorption (electromagnetic radiation) ComputingMilieux_MISCELLANEOUS |
| Zdroj: | ACS Applied Materials & Interfaces ACS Applied Materials & Interfaces, Washington, D.C. : American Chemical Society, 2021, 13 (10), pp.12610-12621. ⟨10.1021/acsami.1c00090⟩ |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c00090⟩ |
| Popis: | The incorporation of silicon and oxygen into hydrogenated amorphous carbon (a-C:H) is an effective approach to decrease the dependence of the tribological properties of a-C:H on the environment. Here, we evaluate the effect of hydrogen and oxygen partial pressures in vacuum on the tribological response of steel pins sliding against films consisting of silicon- and oxygen-containing a-C:H (a-C:H:Si:O). Experiments are conducted in the low-friction/low-wear regime, where sufficient gas pressure prevents steel from adhering to the a-C:H:Si:O, with the velocity accommodation mode being interfacial sliding between the tribotrack formed in the a-C:H:Si:O film and the carbonaceous tribofilm that is formed on the countersurface. The experiments indicated a decrease (increase) in friction and wear with the hydrogen (oxygen) pressure (hydrogen pressures between 50 and 2000 mbar; oxygen pressures between 10 and 1000 mbar). Characterization by X-ray photoelectron and absorption spectroscopies indicated the occurrence of tribologically induced rehybridization of carbon-carbon bonds from sp |
| Databáze: | OpenAIRE |
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