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Effect of work function and cohesive energy of the constituent phases of Ti-50 at.% Al cathode during arc deposition of Ti-Al-N coatings
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering. Linköping University. (Nanostructured Materials)
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering. SECO Tools AB, Fagersta, Sweden.ORCID iD: 0000-0003-4577-0976
PLANSEE Composite Materials GmbH, Lechbruck am See, Germany.
PLANSEE Composite Materials GmbH, Lechbruck am See, Germany.
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2019 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 357, p. 393-401Article in journal (Refereed) Published
Abstract [en]

The differences in work function (W.F.) and cohesive energy (C.E.) of the phases constituting the cathode, plays an important role in the formation of the converted layer at its near-surface region during cathodic arc deposition. As a consequence, this also affects the deposition conditions for the coatings. In this study, we explore the effect of W.F. and C.E. of the constituent phases during arc evaporation by utilizing two kinds of customized Ti-50 at.% Al cathodes with different phase compositions. Our results show that during reactive arc evaporation the disparity in W.F. and C.E. among the constituent phases of Ti-50 at.% Al cathodes leads to preferential erosion of the phases with lower W.F. and C.E. The aforementioned preferential erosion begets higher surface roughness on the Ti-50 at.% Al cathode with a wider range of W.F. and C.E. disparity. It is also observed that the thermal conductivity of the Ti-50 at.% Al cathode plays a dominant role in the deposition rate of Ti-Al-N coating. This article also presents how the surface geometry of the cathode in the presence of arc guiding magnetic field significantly influences the microstructure of the deposited coatings.

Place, publisher, year, edition, pages
USA: Elsevier, 2019. Vol. 357, p. 393-401
Keywords [en]
Cathodic arc, TiAlN, Work function, Reactive hot isostatic pressing, Coatings
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-152247DOI: 10.1016/j.surfcoat.2018.10.027ISI: 000455691100060Scopus ID: 2-s2.0-85054904870OAI: oai:DiVA.org:liu-152247DiVA, id: diva2:1258079
Projects
FunMat-II
Funder
VINNOVA, 2016-05156
Note

Funding agencies: VINN Excelence Excellence Center in Research and Innovation on Functional Nanoscale Materials (FunMat-II) by the Swedish Governmental Agency for Innovation Systems [2016-05156]

Available from: 2018-10-23 Created: 2018-10-23 Last updated: 2019-01-29Bibliographically approved

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The full text will be freely available from 2020-10-15 12:50
Available from 2020-10-15 12:50

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Syed, BilalJöessar, Mats J.Odén, Magnus

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