Observations of dislocations in Cu/Nb nanolayer composites after deformation

摘要: Dislocations have been observed in deformed Cu/Nb nanolayer composites of wavelength 17 and 7 nm. The dislocations thread through the interfaces even though there is a change Burgers vector. Conventional high resolution transmission electron microscopy studies show that in-plane bowing direction these Cu layers opposite to Nb layers, so appear zig-zag. These observations are explained by presence residual tensile stresses compressive Nb, which make bow directions alternating layers. {copyright} {ital 1997 Materials Research Society.}