Publication :


Title:

Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing

Authors: E. Copin, T. Sentenac, Y. Le Maoult, F. Blas, F. Ansart, V. Vidal and P. Lours
Year: 2014
Journal: Surface and Coatings Technology.
Volume: 260, Pages: 90-96

DOI: 10.1016/j.surfcoat.2014.08.077
Référencé ISI Web Of Science
Référencé Scopus

Abstract:
This paper investigates the feasibility of manufacturing sol-gel multilayer thermal barrier coatings (TBC) functionalized with different lanthanide ions Ln3+ having distinct photo-luminescence emission wavelengths (Ln = Sm, Eu, Dy, Er, Tm) for future applications in temperature gradient sensing. Ln3+ doped 9.75 mol% yttria stabilized zirconia (YSZ) powders were produced to study the effect of activator concentration on luminescence intensity and host matrix crystal structure. Self-quenching was found to limit the maximum signal-to-noise ratio achievable with Sm3+, Dy3+, Er3+ and Tm3+ activators,which was not the case for Eu3+ in the 1–10mol% range. The increase in activator was found to affect the crystal structure of YSZ. A solution was proposed that suppressed this effect while significantly increasing the luminescence intensity of all activators. Finally a TBC sensor prototype integrating Eu3+, Er3+ and Dy3+ doped layers distributed throughout the thickness was successfully deposited by a dip-coating sol-gel process and showed promising through-thickness luminescence sensing capabilities.

Bibtex citation :
@article{Copin2014,
Author={Copin, E. and Sentenac, T. and Le Maoult, Y. and Blas, F. and Ansart, F. and Vidal, V. and Lours, P.},
Title={Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing},
Journal={Surface and Coatings Technology},
Volume={260},
Number={},
Pages={90-96},
Year={2014}}


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