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  4. Microstructural investigations of polycrystalline Ti2AlN prepared by physical vapor deposition of Ti-AlN multilayers
 
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2018
Journal Article
Titel

Microstructural investigations of polycrystalline Ti2AlN prepared by physical vapor deposition of Ti-AlN multilayers

Abstract
Ti2AlN is a prominent ternary nitride and belongs to the class of nanolaminated Mn + 1AXn phase materials which combine metallic and ceramic properties. In this work we report on the successful synthesis of polycrystalline Ti2AlN thin films with a preferential (000l) orientation on a polycrystalline Al2O3 substrate by depositing multiple Ti-AlN double layers and applying a subsequent annealing step. Investigations with scanning electron microscopy (SEM), X-ray diffraction (XRD), electron back scatter diffraction (EBSD) and Raman spectroscopy reveal a successful transformation of the multilayer system into a polycrystalline and dense Ti2AlN coating with a thickness of 2.7 mm. The observed grains are plate-like shaped with an in-plane size of about 100 to 300 nm and a thickness of 30 to 60 nm. Furthermore EBSD measurements proof that these macroscopic grains have a preferred orientation in the [000l] direction. We believe that a (000l)-textured microstructure will lead to new applications for protective coatings on polycrystalline substrates.
Author(s)
Gröner, Lukas
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Kirste, Lutz
Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Oeser, Sabine
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Fromm, Alexander
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Wirth, Marco
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Meyer, Frank
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Burmeister, Frank
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Eberl, Chris
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Zeitschrift
Surface and coatings technology
DOI
10.1016/j.surfcoat.2017.09.042
File(s)
N-470833.pdf (1.63 MB)
Language
English
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Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Tags
  • MAX phase

  • Ti2AlN

  • PVD

  • multilayer deposition...

  • microstructure

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