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Solid state formation of Ti4AlN3 in cathodic arc deposited (Ti1-xAlx)N-y alloys
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering. Saarland University, Germany.
Saarland University, Germany.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering. SECO Tools AB, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-1785-0864
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2017 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 129, 268-277 p.Article in journal (Refereed) Published
Abstract [en]

Reactive cathodic arc deposition was used to grow substoichiometric solid solution cubic c-(Ti1-xAlx)N-y thin films. The films were removed from the substrate and then heated in an argon environment to 1400 degrees C. Via solid state reactions, formation of MAX phase Ti4AlN3 was obtained. Additional phases such as Ti2AlN, c-TiN, w-AIN, Al5Ti2 and Al3Ti were also present during the solid state reaction. Ti4AlN3 formation was observed in samples with an Al metal fraction x amp;lt; 0.63 and a nitrogen content 0.4 amp;lt; y amp;lt; 0.6. Regardless of the initial composition, formation of Ti4AlN3 started in Ti2AlN crystal plates in the temperature range between 1200 and 1400 degrees C. Accompanying the onset of Ti4AlN3 was the presence of an intermediate structure identified as Ti6Al2N4, consisting of alternating layers of intergrown Ti2AlN and Ti4AlN3 phases with a half-unit-cell stacking. We suggest that the formation of Ti4AlN3 occurred via intercalation of aluminum and nitrogen along the basal plane accompanied by a simultaneous detwinning process. In addition we propose that this formation mechanism can be used to obtain MAX phases of high n order. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 129, 268-277 p.
Keyword [en]
MAX phase; Intergrown phase; Thin films; Solid state reaction; Intercalation
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-137593DOI: 10.1016/j.actamat.2017.03.001ISI: 000400033900026OAI: oai:DiVA.org:liu-137593DiVA: diva2:1097444
Note

Funding Agencies|European Unions Erasmus Mundus doctoral program DocMASE; Swedish Research Council [621-2012-4401]; Swedish government strategic research area grant AFM SFO MatLiU [2009-00971]; VINNOVA (M - Era.net project MC2) [2013-02355]; European Research Council under the European Communitys Seventh Framework Program (FP) [335383]; DFG; federal state government of Saarland [INST 256/298-1 FUGG, INST 256/431-1 FUGG]; European Regional Development Fund [AME-Lab C/4-EFRE-13/2009/Br]

Available from: 2017-05-22 Created: 2017-05-22 Last updated: 2017-06-14

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Schramm, IsabellaJohansson Jöesaar, Mats PEklund, PerOdén, Magnus
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