Oxidation-resistant Ti-90Al coatings with lotus effect surface morphology deposited on a γ-TiAl alloy

Research output: Contribution to journal › Research article › Contributed › peer-review

Contributors

  • P. Zhang - , Brandenburg University of Technology Cottbus-Senftenberg (Author)
  • A. Flores-Renteria - , Brandenburg University of Technology Cottbus-Senftenberg (Author)
  • E. Wild - , Technical University of Berlin (Author)
  • W. Reimers - , Technical University of Berlin (Author)
  • C. Leyens - , Chair of Materials Technology, Brandenburg University of Technology Cottbus-Senftenberg (Author)

Abstract

Ti-90Al (in at.%) coatings were deposited on Ti-45Al-8Nb alloy at two different temperatures, 300 and 540 °C. The coating sputtered at 300 °C consisted of Al and TiAl3 with columnar grain structure. The morphology, chemical composition and microstructure of the coating sputtered at 540 °C were strongly dependent on the substrate microstructure. The two coating variants formed oxidation-resistant Al2O3 scales during oxidation. The special morphological features of the coatings make them interesting for geometrically structuring the surfaces to provoke the lotus effect.

Details

Original languageEnglish
Pages (from-to)1156-1159
Number of pages4
JournalScripta materialia
Volume61
Issue number12
Publication statusPublished - Dec 2009
Peer-reviewedYes

Keywords

ASJC Scopus subject areas

Keywords

  • γ-TiAl alloy, Lotus effect, Oxidation-resistant coating, Sputtering, Ti-Al coating