Properties of nanocrystalline CuAg foil prepared via electrodeposition

[摘要] In this study, we fabricated nanocrystalline CuAg foils with a thickness of 40 mu m using an electrodeposition method, and evaluated its structure and properties. Using an appropriate combination of organic additives and a continuous Ag+ supply system, compact and bright nanocrystalline CuAg foils were obtained. The as-deposited CuAg foil consisted of supersaturated CuAg crystals with a mean diameter of similar to 13 nm, and exhibited high ultimate tensile strength (993 MPa), high electrical conductivity (66.7% IACS), and moderate ductility. With mild annealing at 100 degrees C, both the strength and the conductivity were improved further (1043 MPa and 68% IACS, respectively), achieving properties comparable to those of the state-of-the-art deformed CuAg of greater thicknesses. Upon annealing at similar to 200 degrees C, Ag atoms that segregated at the grain boundary began to precipitate and grow, thereby destabilizing the Cu nanograins. This resulted in grain growth, decreased strength, and increased conductivity. (C) 2021 The Author(s). Published by Elsevier B.V.

[发布日期] 2021-11-10

[关键词] CuAg alloy;Electrodeposition;Nanocrystalline material;Stability;Tensile property