In this work, micropillar compression testing has been used to obtain stress-strain curves for sputter-deposited Cu-Nb nanolaminate composites with nominal bilayer thickness of 10 nm. In addition to the extremely high flow strength of 2.4 GPa, the 5 nm Cu/5 nm Nb nanolaminate exhibits significant ductility, in excess of 25% true strain.
Bibliographical noteFunding Information:
The authors gratefully acknowledge fruitful discussions with Professor John P. Hirth, Michael D. Uchic, Michael J. Demkowicz, and J. Greg Swadener. This research is supported by the Department of Energy, Office of Science, Office of Basic Energy Sciences.