Journal
MATERIALS LETTERS
Volume 252, Issue -, Pages 207-210Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2019.05.101
Keywords
Metallic composite; Cu-Ag composite; Sc doping; Hardness; Electrical properties; Precipitation
Funding
- National Key R&D Program of China [2017YFE0107900]
- 111 Project of China [B07015]
- US National Science Foundation [NSF DMR-1157490, NSF DMR-1644779]
- State of Florida
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The microstructure and properties of Cu-Ag can be tuned by doping with Sc. To strengthen Cu-Ag while keeping cost low and electrical conductivity high, we lowered Ag content and added Sc. After aging treatment, our doped Cu-3 wt%Ag-0.3 wt% Sc contained exclusively continuous Ag precipitates, as opposed to exclusively discontinuous Ag precipitates in non-doped Cu-3 wt%Ag. After deformation at a low level of strain, electrical conductivity was almost the same in doped and non-doped samples, but Sc doping significantly improved hardness by suppressing formation of discontinuous Ag precipitates. (C) 2019 Elsevier B.V. All rights reserved.
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