Self-healing thermal barrier coating systems fabricated by spark plasma sintering

Franck Nozahic, Claude Estournès*, Alexandra Lucia Carabat, Willem G. Sloof, Sybrand van der Zwaag, Daniel Monceau

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

29 Citations (Scopus)
3 Downloads (Pure)

Abstract

The present paper focuses on the Spark Plasma Sintering (SPS) manufacturing of a new type of self-healing thermal barrier coating (TBC) and a study of its thermal cycling behaviour. The ceramic coating consists on an Yttria Partially Stabilized Zirconia (YPSZ) matrix into which healing agents made of MoSi2-Al2O3 core-shell particles are dispersed prior to sintering. The protocol used to sinter self-healing TBCs on MCrAlY (M: Ni or NiCo) pre-coated Ni-based superalloys is described and the reaction between the particles and the MCrAlY bond coating as well as the preventive solutions are determined. Thermal cycling experiments are performed on this complete multilayer system to study the crack healing behaviour. Post-mortem observations highlighted local healing of cracks due to the formation of silica and the subsequent conversion to zircon at the rims of the cracks.

Original languageEnglish
Pages (from-to)204-213
JournalMaterials & Design
Volume143
DOIs
Publication statusPublished - 2018

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Ceramic matrix composites
  • High-temperature cyclic oxidation
  • Intermetallic particles
  • Multi-layer materials
  • Self-healing thermal barrier coatings
  • Spark plasma sintering

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