Thermal barrier coatings deposited by laser CVD

Takashi Goto

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

The ceramic coating is a key issue for thermal barrier coatings (TBCs) in gas turbine technology. Atmospheric plasma spray (APS) and electron-beam physical vapor deposition (EBPVD) are commonly employed in practical applications. An alternative route, chemical vapor deposition (CVD), is a candidate process for TBCs. Although CVD has been understood to be too slow to obtain thick coatings, a laser CVD process has achieved an extremely high deposition rate (660 μm/h) for yttria-stabilized zirconia (YSZ) coatings. The high deposition rates have caused a large number of nano-pores in grains leading to a significantly smaller thermal conductivity of 0.7 W/mK. This paper briefly reviews the process for TBCs, and introduces laser CVD for thick oxide coatings.

Original languageEnglish
Pages (from-to)367-371
Number of pages5
JournalSurface and Coatings Technology
Volume198
Issue number1-3 SPEC. ISS.
DOIs
Publication statusPublished - 2005 Aug 1

Keywords

  • Laser
  • Photolaser CVD
  • Thermal barrier
  • Yttrium oxide
  • Zirconium oxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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