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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Krywka, C.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Ion irradiation-induced localized stress relaxation in W thin film revealed by cross-sectional X-ray nanodiffractioncitations
- 2020Indentation-Induced Structural Changes in Vitreous Silica Probed by in-situ Small-Angle X-Ray Scatteringcitations
- 2019Strain and stress analyses on thermally annealed Ti-Al-N/Mo-Si-B multilayer coatings by synchrotron X-ray diffractioncitations
- 2016Cross-sectional structure-property relationship in a graded nanocrystalline Ti1-xAlxN thin filmcitations
- 2016Cross-sectional structure-property relationship in a graded nanocrystalline Ti1−xAlxN thin filmcitations
- 2016Cross-sectional structure-property relationship in a graded nanocrystalline $mathrm{Ti_{1−x}Al_{x}N}$ thin filmcitations
- 2016Mapping strain fields induced in Zr-based bulk metallic glasses during in-situ nanoindentation by X-ray nanodiffractioncitations
- 2007Erratum: The small-angle and wide-angle X-ray scattering set-up at beamline BL9 of DELTA (Journal of Synchrotron Radiation (2007) 14 (244-251))citations
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article
Cross-sectional structure-property relationship in a graded nanocrystalline Ti1-xAlxN thin film
Abstract
<p>The influence of simultaneously occurring gradients of crystalline phases, microstructure, chemical composition and strains on overall as well as local mechanical properties of nanocrystalline thin films is challenging to understand. In this work, cross-sectional structure-property relationships in a graded nanocrystalline 2 μm thick Ti<sub>1-x</sub>Al<sub>x</sub>N film were analyzed using in-situ bending tests on micro-cantilevers in transmission electron microscope, synchrotron X-ray nanodiffraction and nanoindentation. The results document that sub-micron depth variations of fracture stresses, hardness and elastic moduli depend on phases, crystallite sizes, crystallographic texture, Ti/Al ratio and residual strain. The local mechanical properties are primarily influenced by cross-sectional occurrence of binary and ternary phases and their intrinsic properties. Secondly, the hardness and fracture stress gradients depend on cross-sectional microstructure, especially on the local crystallite sizes and shapes as well as fiber textures. Two nucleation regions of cubic TiN and hexagonal Ti<sub>1-x</sub>Al<sub>x</sub>N phases with globular shaped crystal sizes in the nm range and relatively large in-plane residuals strains result in significantly higher hardness and fracture stresses in comparison with a coarse-grained region consisting of columnar cubic Ti<sub>1-x</sub>Al<sub>x</sub>N crystallites. The fracture behavior of cantilevers with ∼0.5 × 0.5 μm<sup>2</sup> cross-section depends also on the apparent grain size whereby the nucleation regions exhibit linear-elastic fracture in contrast to partly ductile response of the region with elongated nanocrystals. Finally, the experimental data indicate the possibility of mechanical optimization of nanocrystalline thin films through cross-sectional nanoscale design.</p>