Improved fracture resistance of Cu/Mo bilayers with thickness tailoring

Megan J. Cordill, Tanja Jörg, Daniel Többens, Christian Mitterer

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2 Citations (Scopus)


The fracture toughness of Mo in Cu/Mo bilayers on polyimide was assessed with in situ X-ray diffraction during uniaxial tensile straining. The fracture resistance of Mo acting as an adhesion layer greatly depends on the thickness of the Cu layer exhibiting a toughening effect with increasing Cu layer thickness. In contrast, the presence of the Mo interlayer greatly decreases the apparent K Ic of the Cu layers. The quantification of K Ic for Mo with a Cu top layer provides further evidence that when brittle layers are used, a thicker ductile layer is advantageous to create fracture resistant stretchable systems.

Original languageEnglish
Article number113994
Number of pages5
JournalScripta materialia
Issue numberSeptember
Early online date24 May 2021
Publication statusPublished - Sept 2021

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