Interface structure and radiation damage resistance in Cu-Nb multilayer nanocomposites.
We use atomistic simulations to show that upon removal or insertion of atoms, misfit dislocations in Cu-Nb interfaces shift between two adjacent planes, forming pairs of extended jogs. Different jog combinations give rise to interface structures with unlike densities but nearly degenerate energies, making Cu-Nb interfaces virtually inexhaustible sinks for radiation-induced point defects and catalysts for efficient Frenkel pair recombination.
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. demkowicz@lanl.gov
M J
MJ
Demkowicz
R G
RG
Hoagland
J P
JP
Hirth