Structural metal-clad polymer article

A metal-clad polymer article comprising:

• (i) a polymeric material which at room temperature in at least one direction has a minimum coefficient of linear thermal expansion of 30×10−6 K−1;
• and
• (ii) a metallic material having a microstructure which is fine-grained with an average grain size between 2 and 5,000 nm and/or an amorphous microstructure, said metallic material forming a metallic layer and said metallic material having a maximum coefficient of linear thermal expansion at room temperature in all directions of 25×10−6 K−1, wherein said metallic material consists essentially of a metal selected from the group consisting of Ag, Al, Au, Co, Cr, Cu, Fe, Ni, Mo, Pb, Pd, Pt, Rh, Ru, Sn, Ti, W, Zn and Zr or comprises an alloy containing at least one metal selected from the group consisting of Ag, Al, Au, Co, Cr, Cu, Fe, Ni, Mo, Pb, Pd, Pt, Rh, Ru, Sn, Ti, W, Zn and Zr;
• (iii) with or without at least one intermediate layer between the polymeric material and the metallic material layer;
• (iv) an interface formed between any of (i), (ii) and (iii) containing an anchoring structure comprising recesses and/or protrusions to increase the interface surface area;
• and
• (v) wherein said metal-clad polymer article exhibits a pull-off strength between the polymeric material and the metallic material exceeding 200 psi as determined by ASTM D4541-02 Method A-E.