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  Effect of composition and nanostructure on the mechanical properties and thermal stability of Zr100-xCux thin film metallic glasses

Brognara, A., Best, J. P., Djemia, P., Faurie, D., Dehm, G., & Ghidelli, M. (2022). Effect of composition and nanostructure on the mechanical properties and thermal stability of Zr100-xCux thin film metallic glasses. Materials & Design, 219: 110752. doi:10.1016/j.matdes.2022.110752.

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1-s2.0-S0264127522003744-main.pdf (Publisher version), 4MB
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1-s2.0-S0264127522003744-main.pdf
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2022
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The Authors. Published by Elsevier Ltd.

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 Creators:
Brognara, Andrea1, Author           
Best, James P.1, 2, Author           
Djemia, Philippe3, Author           
Faurie, Damien3, Author           
Dehm, Gerhard4, Author           
Ghidelli, Matteo1, 5, Author           
Affiliations:
1Thin Films and Nanostructured Materials, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3274276              
2Nano-/ Micromechanics of Materials, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863401              
3LSPM, (UPR 3407 CNRS), Université Paris 13, Institut Galilée, 99 avenue Jean-Baptiste Clément, Villetaneuse, France, ou_persistent22              
4Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863398              
5Laboratoire des Sciences des Procédés et des Matériaux (LSPM), CNRS, Université Sorbonne Paris Nord, 93430 Villetaneuse, France, ou_persistent22              

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Free keywords: Thin film metallic glasses, Nanocolumnar films, Thermal stability, Local atomic order, Serration behavior, Tensile test on flexible substrate
 Abstract: Thin film metallic glasses (TFMGs) are a novel class of materials showing a mutual combination of large plastic deformation in tension (>10% strain) and superior yield strength up to ∼3.5 GPa, which make them ideal candidates for applications such as flexible electronics. Nevertheless, a clear relationship between the atomic structure and mechanical properties of TFMGs has not yet been achieved. In particular, the role of composition in determining a different local atomic order and the effect of nanostructure on TFMGs properties, must be further investigated. In this work, mechanical properties and thermal stability of several amorphous Zr100-xCux TFMGs with either compact or fine columnar nanostructure were studied. The mediating role of composition in controlling crystallization temperature and hardness is here reported, which was found to increase from 4.6 to 7.7 GPa with increasing Cu content from 26 to 76 at.%. Moreover, plastic behavior and fracture resistance are shown to be highly dependent on both composition and nanostructure, with the Cu-rich and homogeneous film able to withstand elongation up to 2% strain before crack initiation. These results underline how atomic structure changes induced by composition can effectively influence TFMG properties, while demonstrating an approach to tune their behavior for various technological applications.

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Language(s): eng - English
 Dates: 2022-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.matdes.2022.110752
 Degree: -

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Title: Materials & Design
Source Genre: Journal
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Publ. Info: Elsevier Ltd.
Pages: 11 Volume / Issue: 219 Sequence Number: 110752 Start / End Page: - Identifier: ISSN: 0264-1275
CoNE: https://pure.mpg.de/cone/journals/resource/0264-1275