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Journal of Materials Science
Published in: Journal of Materials Science 12/2019

18-03-2019 | Metals

Effect of cooling rate on the structure and nanotribology of Ag–Cu nano-eutectic alloys

Authors: S. K. Kwon, H. D. Kim, X. Q. Pei, H. E. Ko, H. W. Park, R. Bennewitz, A. Caron

Published in: Journal of Materials Science | Issue 12/2019

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Abstract

Wear mechanisms of three Ag–Cu eutectic alloy samples cooled at different rates from the melt have been investigated by friction force microscopy. The eutectic phase exhibits a lamellar structure where the interlamellar thickness decreases with increasing cooling rate. The hardness of the samples decreases with decreasing thickness of the lamellae. In the low normal force regime (Fn ≤ 1000 nN) friction is governed by shearing and the relevant contact area can be well described by the Johnson–Kendal–Roberts model. At higher normal force values, the surface is worn, and friction can be described by the ploughing friction coefficient. A ploughing friction coefficient is determined, which is positively correlated with the hardness of the Ag–Cu eutectic alloy samples cooled at different rates, while the wear volume negatively correlates with the hardness.
previous article Interfacial microstructure evolution and deformation mechanism in an explosively welded Al/Mg alloy plate
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Metadata
Title
Effect of cooling rate on the structure and nanotribology of Ag–Cu nano-eutectic alloys
Authors
S. K. Kwon
H. D. Kim
X. Q. Pei
H. E. Ko
H. W. Park
R. Bennewitz
A. Caron
Publication date
18-03-2019
Publisher
Springer US
Published in
Journal of Materials Science / Issue 12/2019
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-019-03533-5

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