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Atomic scale mechanisms of friction reduction and wear protection by graphene

Klemenz, Andreas; Pastewka, Lars; Balakrishna, Soorali Ganeshamurthy; Caron, Arnaud; Bennewitz, Roland; Moseler, Michael

Abstract:
We study nanoindentation and scratching of graphene-covered Pt(111) surfaces in computer simulations and experiments. We find elastic response at low load, plastic deformation of Pt below the graphene at intermediate load, and eventual rupture of the graphene at high load. Friction remains low in the first two regimes, but jumps to values also found for bare Pt(111) surfaces upon graphene rupture. While graphene substantially enhances the load carrying capacity of the Pt substrate, the substrate's intrinsic hardness and friction are recovered upon graphene rupture.



Originalveröffentlichung
DOI: 10.1021/nl5037403
Scopus
Zitationen: 109
Web of Science
Zitationen: 106
Zugehörige Institution(en) am KIT Fakultät für Maschinenbau (MACH)
Institut für Angewandte Materialien - Computational Materials Science (IAM-CMS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2014
Sprache Englisch
Identifikator ISSN: 1530-6984
KITopen-ID: 1000050677
Erschienen in Nano Letters
Band 14
Heft 12
Seiten 7145-7152
Nachgewiesen in Web of Science
Scopus
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