Hertzian and Nanoindentations on EBPVD-Coated Gadolinium Zirconate Thermal Barrier Materials

Kyu Ick Jung; Sang Hyun Park; Jong Ho Kim; Do Kyung Kim; Ung Yu Paik; Kee Sung Lee

doi:10.4028/www.scientific.net/SSP.124-126.1349

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HomeSolid State PhenomenaSolid State Phenomena Vols. 124-126Hertzian and Nanoindentations on EBPVD-Coated...

Hertzian and Nanoindentations on EBPVD-Coated Gadolinium Zirconate Thermal Barrier Materials

Abstract:

New gadolinium-yttrium zirconate thermal barrier coating(TBC) material is deposited by electron beam PVD method, as an alternative to YSZ TBC layer for gas turbine blade applications. XRD analysis reveals that the new TBC material consists of thermally stable pyrochlore structure. Hertzian and nanoindentation evaluations reveal that gadolinium zirconate materials show superior properties as a TBC candidate material with high mechanical properties. The Y2O3 doping improved hardness and elastic modulus of TBC layers. The indentation stress-strain curves by Hertzian indentation and the load-penetration depth curves by nanoindentation indicate that the new TBC layer has higher damage resistance combined with superior thermal insulation properties rather than commercial YSZ coatings.

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Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

1349-1353

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.1349

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Online since:

June 2007

Authors:

Kyu Ick Jung, Sang Hyun Park, Jong Ho Kim, Do Kyung Kim, Ung Yu Paik, Kee Sung Lee

Keywords:

EB-PVD, Gadolinium, Hertzian/Nano Indentation, Thermal Barrier Coating (TBC), Zirconate Ceramics

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