Tailored microstructure of zirconia and hafnia-based thermal barrier coatings with low thermal conductivity and high hemispherical reflectance by EB-PVD

Jogender Singh, Douglas Edward Wolfe, R. A. Miller, J. I. Eldridge, Dong Ming Zhu

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Zirconia and hafnia based thermal barrier coating materials were produced by industrial prototype electron beam-physical vapor deposition (EB-PVD). Columnar microstructure of the thermal barrier coatings were modified with controlled microporosity and diffuse sub-interfaces resulting in lower thermal conductivity (20-30% depending up on microporosity volume fraction), higher thermal reflectance (15-20%) and more strain tolerance as compared with standard thermal barrier coatings (TBC). The novel processed coating systems were examined by various techniques including scanning electron microscopy (SEM), X-ray diffraction, thermal conductivity by laser technique, and hemispherical reflectance.

Original languageEnglish (US)
Pages (from-to)1975-1985
Number of pages11
JournalJournal of Materials Science
Volume39
Issue number6
DOIs
StatePublished - Mar 15 2004

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Thermal barrier coatings
Physical vapor deposition
Zirconia
Electron beams
Thermal conductivity
Microporosity
Microstructure
Volume fraction
X ray diffraction
Coatings
Scanning electron microscopy
Lasers
zirconium oxide

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "Zirconia and hafnia based thermal barrier coating materials were produced by industrial prototype electron beam-physical vapor deposition (EB-PVD). Columnar microstructure of the thermal barrier coatings were modified with controlled microporosity and diffuse sub-interfaces resulting in lower thermal conductivity (20-30{\%} depending up on microporosity volume fraction), higher thermal reflectance (15-20{\%}) and more strain tolerance as compared with standard thermal barrier coatings (TBC). The novel processed coating systems were examined by various techniques including scanning electron microscopy (SEM), X-ray diffraction, thermal conductivity by laser technique, and hemispherical reflectance.",
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Tailored microstructure of zirconia and hafnia-based thermal barrier coatings with low thermal conductivity and high hemispherical reflectance by EB-PVD. / Singh, Jogender; Wolfe, Douglas Edward; Miller, R. A.; Eldridge, J. I.; Zhu, Dong Ming.

In: Journal of Materials Science, Vol. 39, No. 6, 15.03.2004, p. 1975-1985.

Research output: Contribution to journalArticle

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