Influence of alloying on the tensile strength and electrical resistivity of silver nanowire: copper composites macroscop
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Influence of alloying on the tensile strength and electrical resistivity of silver nanowire: copper composites macroscopic wires Simon Tardieu1,2, David Mesguich1, Antoine Lonjon1, Florence Lecouturier-Dupouy2, Nelson Ferreira2, Geoffroy Chevallier1,3, Arnaud Proietti4, Claude Estourne`s1,3, and Christophe Laurent1,* 1
CIRIMAT, CNRS-INPT-UPS, Université Toulouse 3 Paul-Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France Laboratoire National Des Champs Magnétiques Intenses, EMFL, CNRS-INSA-UGA-UPS, Grenoble, Toulouse, France 3 Plateforme Nationale CNRS de Frittage Flash, PNF2, Université Toulouse 3 Paul-Sabatier, 118 route de Narbonne, Toulouse Cedex 9, MHT 31062, France 4 Centre de Microcaractérisation Raimond Castaing, Université de Toulouse, UMS 3623, Espace Clément Ader, 3 rue Caroline Aigle, Toulouse 31400, France 2
Received: 7 July 2020
ABSTRACT
Accepted: 9 November 2020
Composite powders made up of 1 vol. %Ag nanowires (NW) dispersed in Cu were prepared and consolidated into cylinders by spark plasma sintering. One cylinder was sintered at only 400 °C resulting in a nanocomposite sample with no dissolution of the Ag NW into the Cu matrix. The second cylinder was sintered at 600 °C and the Ag NW are dissolved forming Ag/Cu alloy NW. The cylinders served as starting materials for room temperature wire-drawing, enabling the preparation of wires of decreasing diameters. The microstructure of the cylinders and the wires was investigated by electron microscopy and associated techniques. The tensile strength and electrical resistivity were measured at 293 K and 77 K. The nanocomposite and alloy wires show similar UTS values (1100 MPa at 77 K), but alloying, although spatially limited, provoked a significant increase in electrical resistivity (0.56 lX cm at 77 K) compared to the nanocomposite wires (0.49 lX cm at 77 K).
Published online: 23 November 2020
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: P. Nash.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05556-9
4885
J Mater Sci (2021) 56:4884–4895
GRAPHICAL ABSTRACT 1200
SPS at 400°C
WD Cu
Ag NW
Composite cylinder Composite wire Cu Ag/Cu NW
Powder SPS at 600°C
WD
Ultimate Tensile Strength (MPa)
Ag NW
1100
This work
1000 900 800 700
Composites
77 K
Cu
500
Alloy cylinder
0,2 Alloy wire
Introduction Mechanically stronger electrically conducting wires are required in various domains such as record (100 T) pulsed magnetic fields, power and aerospace engineering. The requirements on electrical conductivity impose a material with a composition as close as possible to pure copper (Cu), therefore ruling out using metallic alloys [1]. Earlier studies have shown that nanocomposite Cu-matrix wires designed and prepared with a combination of ultrafine microstructure and one-dimensional (1D) reinforcement, such as carbon nanotubes (CNT) [2, 3] and silver nanowires (Ag NW) [4], show both a high ultimate tensile strength (UTS) and a low electrical res
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