  Uniform macroscopic samples of nanoporous metal with high deformability have
so far been limited to precious metals such as Au, Pd and Pt. Here we propose
nanoporous Copper-Nickel (npCN) as a nanoporous base metal that can be made
with mm dimensions and exhibits significant deformability. NpCN forms a uniform
bicontinous network structure with feature sizes that can be controlled from 13
to 40 nm by thermal annealing. Continuous compression tests confirm ductile
deformation behavior accompanied with a high strength compared to macroporous
Cu- and Ni-foams with similar solid fraction.
