Nanoindentation of strong and ductile Al2O3/Al hybrid nanolaminates
(2024) EMMC19 - 19th European Mechanics of Materials Conference — Location: Madrid, Spain (29.May.2024)
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- Abstract
- Protective coatings are required to endure severe mechanical stresses, with their durability directly affecting that of the underlying device or system. These layers must therefore exhibit high mechanical performance, ideally maximizing all the components of the well-known strength-ductility-toughness triptych. In this work, we employed a “nanolamination” strategy to design a coating system that meets this complex portfolio of properties. It consists of a multilayered stack alternating amorphous Al2O3 thin films as hard brittle constituents and crystalline Al thin films as softer “gluing” and/or “crack arrestor” constituents, with individual thicknesses below 100 nm. Thanks to an in-depth study combining micro- nanomechanical tests (nanoindentation, lab-on-chip, microscratch, push-to-pull), electron microscopy (SEM, TEM) and numerical simulations (FEM), an optimal nanolaminate system was identified. This optimization methodology will be presented through the eye of the nanoindentation investigations.
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Rusinowicz, M., Baral, P., Jaddi, S., Orekhov, A., Wang, H., Favache, A., Van Loock, F., Coulombier, M., Idrissi, H., & Pardoen, T. (2024). Nanoindentation of strong and ductile Al2O3/Al hybrid nanolaminates. EMMC19 - 19th European Mechanics of Materials Conference, Madrid, Spain. https://hdl.handle.net/2078.5/238807