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Open AccessArticle

Scratching Cu|Au Nanolaminates

by Adrien Gola 1,2 and Lars Pastewka 1,3,4,*
Department of Microsystems Engineering, University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
Institute for Applied Materials, Karlsruhe Institute of Technology, Straße am Forum 4, 76131 Karlsruhe, Germany
Freiburg Materials Research Center, University of Freiburg, 79104 Freiburg, Germany
Cluster of Excellence livMatS @ FIT—Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
Author to whom correspondence should be addressed.
Lubricants 2019, 7(5), 44;
Received: 15 March 2019 / Revised: 3 May 2019 / Accepted: 13 May 2019 / Published: 21 May 2019
(This article belongs to the Special Issue Friction Mechanisms)
We used molecular dynamics simulations to study the scratching of Cu|Au nanolaminates of 5 nm layer thickness with a nanoscale indenter of 15 nm radius at normal forces between 0.5 μ N and 2 μ N. Our simulations show that Au layers wear quickly while Cu layers are more resistant to wear. Plowing was accompanied by the roughening of the Cu|Au heterointerface that lead to the folding of the nanolaminate structure at the edge of the wear track. Our explorative simulations hint at the complex deformation processes occurring in nanolaminates under tribological load. View Full-Text
Keywords: metals; multilayers; nanolaminates; tribology; scratching; molecular dynamics simulations metals; multilayers; nanolaminates; tribology; scratching; molecular dynamics simulations
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Gola, A.; Pastewka, L. Scratching Cu|Au Nanolaminates. Lubricants 2019, 7, 44.

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