Fig. 7: Illustration of a fracture process in superlattice thin films.
From: Mechanistic study of superlattice-enabled high toughness and hardness in MoN/TaN coatings
Schematics of the coherency strains and their consequential stresses influencing crack propagation across the interface. Here, the compressive residual stresses, pictured by arrows in the fracture process zone, impede crack growth across the interface.
