High-speed deposition of nano-pore dispersed zirconia by CVD and improvement of thermal barrier performance

Takashi Goto, Teiichi Kimura, Kong Tu

Research output: Contribution to journalReview articlepeer-review

3 Citations (Scopus)

Abstract

Zirconia is commonly used for thermal barrier coatings (TBCs) because of excellent mechanical and thermal properties. While practical high-speed deposition processes such as atmospheric plasma spray (APS) and electron-beam physical vapor deposition (EB-PVD) have been employed in TBCs, chemical vapor deposition (CVD) has been regarded to be inappropriate due to low deposition rates. However, we have successfully achieved highest deposition rates of 108 and 660μm h-1 with conventional MOCVD and newly developed laser CVD, respectively. The high-speed CVDs are significantly effective to improve the thermal barrier characteristics by the formation of nanopores in columnar zirconia grains. The laser CVD is also applicable for the extremely high-speed deposition of other oxides, such as Y2O3, TiO2 and Al2O3, at deposition rates around 2 to 3 mm h -1.

Original languageEnglish
Pages (from-to)821-828
Number of pages8
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume51
Issue number11
DOIs
Publication statusPublished - 2004 Nov

Keywords

  • Alumina
  • High-speed deposition
  • Laser chemical vapor deposition
  • Nanopore
  • Thermal barrier coating
  • Thermal conductivity
  • Titania
  • Yttria
  • Zirconia

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'High-speed deposition of nano-pore dispersed zirconia by CVD and improvement of thermal barrier performance'. Together they form a unique fingerprint.

Cite this