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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
Title

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 für Werkstoffmechanik IWM  
Kirste, Lutz  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Oeser, Sabine  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Fromm, Alexander  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Wirth, Marco  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Meyer, Frank  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Burmeister, Frank  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Eberl, Chris
Fraunhofer-Institut für Werkstoffmechanik IWM  
Journal
Surface and coatings technology  
Open Access
File(s)
Download (1.63 MB)
DOI
10.24406/publica-r-250345
10.1016/j.surfcoat.2017.09.042
Language
English
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Keyword(s)
  • MAX phase

  • Ti2AlN

  • PVD

  • multilayer deposition

  • microstructure

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