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  Revealing the relationships between chemistry, topology and stiffness of ultrastrong Co-based metallic glass thin films: A combinatorial approach

Schnabel, V., Köhler, M., Evertz, S., Gamcova, J., Bednarcik, J., Mušić, D., et al. (2016). Revealing the relationships between chemistry, topology and stiffness of ultrastrong Co-based metallic glass thin films: A combinatorial approach. Acta Materialia, 107, 213-219. doi:10.1016/j.actamat.2016.01.060.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-B8F6-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-B8F8-8
Genre: Journal Article

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 Creators:
Schnabel, Volker1, Author              
Köhler, Mathias2, Author              
Evertz, Simon3, Author              
Gamcova, Jana4, 5, Author              
Bednarcik, Jozef6, Author              
Mušić, Denis7, Author              
Raabe, Dierk8, Author              
Schneider, Jochen Michael9, Author              
Affiliations:
1Materials Chemistry, RWTH Aachen University, Kopernikusstr. 10, Aachen, Germany, ou_persistent22              
2Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
3Materials Chemistry, RWTH Aachen University, Kopernikusstr. 10, Aachen, Germany, persistent22              
4Deutsches Elektronen Synchrotron DESY, FS-PE Group, Notkestrasse 85, Hamburg, Germany, persistent22              
5Pavol Jozef Šafárik University, Department of Condensed Matter Physics, Park Angelinum 9, Košice, Slovakia, persistent22              
6Deutsches Elektronen Synchrotron DESY,FS-PE group, Notkestrasse 85, D-22607 Hamburg, Germany, persistent22              
7Materials Chemistry, RWTH Aachen University, D-52056 Aachen, Germany, ou_persistent22              
8Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
9Materials Chemistry, RWTH Aachen and Max-Planck-Fellow Group, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society Düsseldorf, persistent13              

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Free keywords: Amorphous materials; Chemical bonds; Cobalt; Combinatorial mathematics; Glass; Mechanical properties; Metallic glass; Metals; Stiffness; Topology; X ray diffraction, Combinatorial approach; Combinatorics; Concentration gradients; High energy x-ray diffraction; Hybridization; Mechanical property measurements; Metallic glass thin films; Short-range order analysis, Thin films
 Abstract: An efficient way to study the relationship between chemical composition and mechanical properties of thin films is to utilize the combinatorial approach, where spatially resolved mechanical property measurements are conducted along a concentration gradient. However, for thin film glasses many properties including the mechanical response are affected by chemical topology. Here a novel method is introduced which enables spatially resolved short range order analysis along concentration gradients of combinatorially synthesized metallic glass thin films. For this purpose a CoZrTaB metallic glass film of 3 μm thickness is deposited on a polyimide foil, which is investigated by high energy X-ray diffraction in transmission mode. Through the correlative chemistry-topology-stiffness investigation, we observe that an increase in metalloid concentration from 26.4 to 32.7 at and the associated formation of localized (hybridized) metal - metalloid bonds induce a 10 increase in stiffness. Concomitantly, along the same composition gradient, a metalloid-concentration-induced increase in first order metal - metal bond distances of 1 is observed, which infers itinerant (metallic) bond weakening. Hence, the metalloid concentration induced increase in hybridized bonding dominates the corresponding weakening of metallic bonds. © 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2016-04-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.actamat.2016.01.060
BibTex Citekey: Schnabel2016213
 Degree: -

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Title: Acta Materialia
  Abbreviation : Acta Mater.
Source Genre: Journal
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Affiliations:
Publ. Info: Kidlington : Elsevier Science
Pages: - Volume / Issue: 107 Sequence Number: - Start / End Page: 213 - 219 Identifier: ISSN: 1359-6454
CoNE: /journals/resource/954928603100