A new Cu-W bionic shell pearl multilayer structure

Different microstructure Cu-W films can satisfy various properties requirements. In this current work, a new CuW bionic shell pearl multilayer structure films were prepared by the DC dual-target magnetron co-deposition method. The connections between the multilayer films are formed by the regular zigzag weaving of slender filamentary structures in the Cu-W bionic shell pearl structure. We discovered that the influence of atomic diffusion resulted in the construction of a bionic shell pearl multilayer structure under the combined effect of W content and uphill diffusion of Cu. The Cu-10.7 at.%W films with this structure consist mainly of the face center cubic(fcc) structure of Cu and a small amount of stacking faults, but its mechanical properties are better than those of the same composition film prepared by other methods. This method can be extended to a general strategy for manufacturing other immiscible systems.