TY - JOUR

T1 - Improved fracture resistance of Cu/Mo bilayers with thickness tailoring

AU - Cordill, Megan J.

AU - Jörg, Tanja

AU - Többens, Daniel

AU - Mitterer, Christian

N1 - Publisher Copyright: © 2021

PY - 2021/9

Y1 - 2021/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85106936971&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2021.113994

DO - 10.1016/j.scriptamat.2021.113994

M3 - Article

VL - 202.2021

JO - Scripta materialia

JF - Scripta materialia

SN - 1359-6462

IS - September

M1 - 113994

ER -