ISIS Neutron and Muon Source Data Journal

Residual stress mapping in high yttria thermally sprayed zirconium oxide coatings

Abstract: Need for high thermal efficiency in aero and land-based turbine engines push the envelope for low conductivity and high strength thermal barrier coatings (TBC?s). Prominent approach towards achieving this is through high yttria content in zirconia to stabilize zirconia . High yttria content degrades the thermal shock resistance of the TBC system. The project therefore aims to explore the residual stress profile of 8YSZ (as sprayed) and 20YSZ (in as sprayed and thermal shock conditions). Mapping residual stresses will provide qualitative information on the thermal shock life of the TBC system thereby eliminating the need of expensive and time-consuming thermal shock studies on all the possible chemistries. Due to the heavy lattice distortion unleashed by the high atomic number rare earth elements, it is expected that neutron diffraction would be able to predict the residual stress and quantify the thermal shock. Neutron diffraction residual strain analysis is expected to expedite the selection of the best composition that would suit both the requirements of thermal shock resistance as well as low thermal conductivity. Reduced tensile residual stress are known to be beneficial to the fatigue life of coatings leading to enhanced thermal cycling behavior ? which demonstrates wider impact of this investigation.

Principal Investigator: Professor Saurav Goel
Experimenter: Dr Viswanathan Venkatachalapathy
Local Contact: Dr Tung Lik Lee
Experimenter: Professor Nadimul Faisal
Experimenter: Dr Jaya Verma
Experimenter: Miss Beth Irungu
Experimenter: Dr Seyed Nader Ameli Kalkhoran

DOI: 10.5286/ISIS.E.RB2310001

ISIS Experiment Number: RB2310001

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Saurav Goel et al; (2024): Residual stress mapping in high yttria thermally sprayed zirconium oxide coatings, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2310001

Data is released under the CC-BY-4.0 license.