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      Chemical effects on the sliding friction of Ag and Au(111)

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          Abstract

          We have investigated the sliding friction behavior of metallic couples with different enthalpy of mixing or reaction by friction force microscopy. Comparing the friction behavior of miscible and immiscible couples we find that in the first case friction is governed by adhesion while the shear strength is low ( τ = 3–6 MPa). In the latter case of immiscible couples, adhesion is found to be low and the shear strength is large ( τ ≈ 70 MPa). Statistical analysis of atomic stick-slip images recorded on an Au(111) surface with tips of different affinities with gold allows for a deeper understanding of our results. The periodicity of atomic stick-slip images corresponds to the interatomic distance of gold for immiscible counter-bodies. In contrast, for a reactive couple the periodicity of atomic stick-slip significantly differs from the gold interatomic distance and may correspond to the structural length of an ordered intermediate phase at the tip-surface interface.

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          Most cited references 23

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                Author and article information

                Affiliations
                KoreaTech–Korea University of Technology and Education, Chungnam Province 330-708, Republic of Korea
                Author notes
                * Corresponding author: A. CARON, E-mail: arnaud.caron@ 123456koreatech.ac.kr

                Arnaud CARON. He is a materials scientist with expertise in the multi-scale mechanical behavior of materials, surfaces and micro- components. Since 2015 Arnaud Caron is assistant professor in the School of Energy, Materials and Chemical Engineering at KoreaTech–Korea University of Technology and Education, Republic of Korea. Arnaud Caron obtained his engineering degree in materials science in 2004 from the University of Saarland, Germany and was awarded with the Schiebold Medal. In 2009 he earned his doctoral degree in materials science from the University of Saarland, Germany. From 2007 to 2015 Arnaud Caron worked as a research associate at the Institute of Micro- and Nanomaterials of the University of Ulm, Germany, the WPI-Advanced Institute of Materials Research, Japan and the Leibniz–Institute for New Materials, Germany.

                Hui Eun KO. She received her bachelor degree in material science and engineering in 2016 from KoreaTech—Korea University of Technology and Education, Cheonan, Republic of Korea. Since then, she has been studying for her master degree in material science and engineering at KoreaTech. Her research interests include nano-tribology and mechanical properties of metals and metallic glasses.

                Journal
                Tsinghua Science and Technology
                Friction
                Tsinghua University Press (Xueyuan Building, Tsinghua University, Beijing 100084, China )
                2223-7690
                05 March 2018
                : 06
                : 01
                : 84-97 (pp. )
                2223-7690-06-01-84
                10.1007/s40544-017-0167-5

                This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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                Figures: 8, Tables: 4, References: 34, Pages: 14
                Categories
                Research Article

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