Thermal conductivity and thermal stability of zirconia and hafnia based thermal barrier coatings by EB-PVD for high temperature applications

Jogender Singh, Douglas Edward Wolfe, Robert Miller, Jeff Eldridge, Dong Ming Zhu

Research output: Contribution to journalConference article

6 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, and thermal conductivity by laser technique, hemispherical reflectance and thermal cyclic tests. The test results showed the tailored-microstructural TBC offered superior performance over the conventional thermal barrier coatings (ZrO 2 -8 wt.% Y 2O 3).

Original languageEnglish (US)
Pages (from-to)579-586
Number of pages8
JournalMaterials Science Forum
Volume455-456
StatePublished - Jul 28 2004

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Thermal barrier coatings
High temperature applications
Physical vapor deposition
zirconium oxides
Zirconia
Electron beams
Thermal conductivity
Thermodynamic stability
thermal stability
thermal conductivity
vapor deposition
electron beams
coatings
microporosity
Microporosity
reflectance
coating
Volume fraction
prototypes
zirconium oxide

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Thermal conductivity and thermal stability of zirconia and hafnia based thermal barrier coatings by EB-PVD for high temperature applications",
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, and thermal conductivity by laser technique, hemispherical reflectance and thermal cyclic tests. The test results showed the tailored-microstructural TBC offered superior performance over the conventional thermal barrier coatings (ZrO 2 -8 wt.{\%} Y 2O 3).",
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Thermal conductivity and thermal stability of zirconia and hafnia based thermal barrier coatings by EB-PVD for high temperature applications. / Singh, Jogender; Wolfe, Douglas Edward; Miller, Robert; Eldridge, Jeff; Zhu, Dong Ming.

In: Materials Science Forum, Vol. 455-456, 28.07.2004, p. 579-586.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Thermal conductivity and thermal stability of zirconia and hafnia based thermal barrier coatings by EB-PVD for high temperature applications

AU - Singh, Jogender

AU - Wolfe, Douglas Edward

AU - Miller, Robert

AU - Eldridge, Jeff

AU - Zhu, Dong Ming

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AB - 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, and thermal conductivity by laser technique, hemispherical reflectance and thermal cyclic tests. The test results showed the tailored-microstructural TBC offered superior performance over the conventional thermal barrier coatings (ZrO 2 -8 wt.% Y 2O 3).

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