Nanophase partially stabilized zirconia intermediate layer for strain accommodation in a multi-layer thermal barrier coating

D. N. Guru, M. Palacio, W. Mook, M. Chambers, J. Heberlein, William W Gerberich, O. Racek, C. C. Berndt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Applying an environmental barrier coating (EBC) and a thermal barrier coating (TBC) on the next generation gas turbine structural materials such as silicon carbide matrix composites will lead to large stresses due to thermal expansion mismatch; thereby limiting the coating's effectiveness and lifetime. Nanostructured materials possess a large volume fraction of grain boundaries and are conjectured to partially relieve the strain in the coating structure. A Triple Torch Plasma Reactor (TTPR) was used to spray multi-layered TBCs consisting of a mullite EBC deposited either on a silicon carbide or a mullite substrate, a nano-phase partially stabilized zirconia coating (n-PSZ), and a yttria stabilized zirconia coating (YSZ) as the TBC. The nanostructure of the n-PSZ could be maintained during the deposition process. The coatings were heat treated at 1300°C and the change in microstructure and mechanical properties were analyzed using scanning electron microscopy (SEM), micro-indentation and scratch testing applied to the coating cross section. While a change in the microstructure was observed, in particular grain growth, the hardness and elastic modulus appeared to be little affected by the heat treatment giving a preliminary validation of the multilayer concept.

Original languageEnglish (US)
Title of host publicationProceedings of the International Thermal Spray Conference
Pages861-865
Number of pages5
StatePublished - Dec 27 2004
EventProceedings of the International Thermal Spray Conference - Osaka, Japan
Duration: May 10 2004May 12 2004

Publication series

NameProceedings of the International Thermal Spray Conference

Other

OtherProceedings of the International Thermal Spray Conference
CountryJapan
CityOsaka
Period5/10/045/12/04

Fingerprint

Thermal barrier coatings
accommodation
zirconium oxides
Zirconia
coatings
Coatings
Mullite
Silicon carbide
silicon carbides
Plasma torches
zirconium oxide
Microstructure
Yttria stabilized zirconia
plasma torches
microstructure
Grain growth
Indentation
Nanostructured materials
gas turbines
Thermal expansion

Cite this

Guru, D. N., Palacio, M., Mook, W., Chambers, M., Heberlein, J., Gerberich, W. W., ... Berndt, C. C. (2004). Nanophase partially stabilized zirconia intermediate layer for strain accommodation in a multi-layer thermal barrier coating. In Proceedings of the International Thermal Spray Conference (pp. 861-865). (Proceedings of the International Thermal Spray Conference).

Nanophase partially stabilized zirconia intermediate layer for strain accommodation in a multi-layer thermal barrier coating. / Guru, D. N.; Palacio, M.; Mook, W.; Chambers, M.; Heberlein, J.; Gerberich, William W; Racek, O.; Berndt, C. C.

Proceedings of the International Thermal Spray Conference. 2004. p. 861-865 (Proceedings of the International Thermal Spray Conference).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Guru, DN, Palacio, M, Mook, W, Chambers, M, Heberlein, J, Gerberich, WW, Racek, O & Berndt, CC 2004, Nanophase partially stabilized zirconia intermediate layer for strain accommodation in a multi-layer thermal barrier coating. in Proceedings of the International Thermal Spray Conference. Proceedings of the International Thermal Spray Conference, pp. 861-865, Proceedings of the International Thermal Spray Conference, Osaka, Japan, 5/10/04.
Guru DN, Palacio M, Mook W, Chambers M, Heberlein J, Gerberich WW et al. Nanophase partially stabilized zirconia intermediate layer for strain accommodation in a multi-layer thermal barrier coating. In Proceedings of the International Thermal Spray Conference. 2004. p. 861-865. (Proceedings of the International Thermal Spray Conference).
Guru, D. N. ; Palacio, M. ; Mook, W. ; Chambers, M. ; Heberlein, J. ; Gerberich, William W ; Racek, O. ; Berndt, C. C. / Nanophase partially stabilized zirconia intermediate layer for strain accommodation in a multi-layer thermal barrier coating. Proceedings of the International Thermal Spray Conference. 2004. pp. 861-865 (Proceedings of the International Thermal Spray Conference).
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