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Age hardening in (Ti1-xAlx)B2+Delta thin films
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-3203-7935
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering. Max Planck Institute Eisenforsch GmbH, Germany.
Uppsala University, Sweden.
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2017 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 127, 122-126 p.Article in journal (Refereed) Published
Abstract [en]

Thin films of (Ti0.71Al0.29)B2+1.08 have been deposited by magnetron sputtering. Post-deposition annealing at 1000 degrees C for 1 h results in increased hardness and elastic modulus, from 32 to 37 GPa and from 436 to 461 GPa, respectively. In both as-deposited and annealed states the films adhere well to the substrate, indicating no considerable internal stress. The initial high hardness is attributed to a columnar microstructure consisting of crystalline (Ti,Al)B-2 columns separated by an amorphous B matrix. The observed age hardening corresponds to phase separation within the (Ti,Al)B-2 columns including the formation of Ti-deficient crystallites within the grain interior upon annealing. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 127, 122-126 p.
Keyword [en]
Titanium diboride; Thin films; Mechanical properties; Hardness
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-132648DOI: 10.1016/j.scriptamat.2016.09.021ISI: 000386407100028OAI: oai:DiVA.org:liu-132648DiVA: diva2:1048397
Note

Funding Agencies|European Research Council under the European Community Seventh Framework Program (FP7)/ERC [258509]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [200900971]; Swedish Research Council (VR) [621-2012-4425, 642-2013-8020, 621-2011-4417, 330-2014-6336, 622-2008-405, 621-2012-4359]; SSF synergy grant FUNCASE; Knut and Mice Wallenberg (KAW) Foundation [2015.0043]

Available from: 2016-11-21 Created: 2016-11-18 Last updated: 2016-11-21

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Mockuté, AurelijaPalisaitis, JustinasAlling, BjörnBroitman, EstebanNäslund, Lars-ÅkeNedfors, NilsLu, JunJensen, JensHultman, LarsPersson, Per O ARosén, Johanna
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Thin Film PhysicsFaculty of Science & EngineeringDepartment of Physics, Chemistry and Biology
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