High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay
High-temperature interaction of a sol-gel derived artificial volcanic ash (AVA) matching the bulk composition of the April 15, 2010 Eyjafjallajokull (Iceland) volcanic eruption with a standard 4 mol-% (7 wt-%) Y2O3-stabilized ZrO2 (YSZ) EB-PVD thermal barrier coating and a corresponding YSZ powder i...
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ftdlr:oai:elib.dlr.de:69295 2023-05-15T16:51:07+02:00 High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay Mechnich, Peter Braue, Wolfgang Schulz, Uwe 2011-03 http://elib.dlr.de/69295/ unknown Wiley Mechnich, Peter und Braue, Wolfgang und Schulz, Uwe (2011) High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay. Journal of the American Ceramic Society, 94 (3), Seiten 925-931. Wiley. DOI:10.1111/j.1551-2916.2010.04166.x Keramische Struktur- und Funktionswerkstoffe Zeitschriftenbeitrag PeerReviewed 2011 ftdlr https://doi.org/10.1111/j.1551-2916.2010.04166.x 2018-03-11T23:50:23Z High-temperature interaction of a sol-gel derived artificial volcanic ash (AVA) matching the bulk composition of the April 15, 2010 Eyjafjallajokull (Iceland) volcanic eruption with a standard 4 mol-% (7 wt-%) Y2O3-stabilized ZrO2 (YSZ) EB-PVD thermal barrier coating and a corresponding YSZ powder is investigated in order to access possible implications of similar volcanic ashes on the performance of coated turbine engine airfoils. Up to 900°C AVA deposits and EB-PVD YSZ do not show significant interaction. Viscous flow above the glass transition of AVA (Tg ~ 930 °C) yields proceeding wetting of EB-PVD YSZ coatings. At 1100 °C, the YSZ surface is covered by a dense glaze-like AVA overlay. At 1200 °C AVA is mostly infiltrating the coating, leaving a crystalline plagioclase- and hematite-type residue at the interface. Moreover, some ZrSiO4 is formed at the expense of YSZ. The overall thermochemical effects upon short-term exposure of the EB-PVD YSZ coating to a small AVA load were moderate, in particular prior to complete infiltration. On the other hand, AVA acts as a solvent for the stabilizing Y2O3 beyond 1000 °C and a progressive depletion of Y2O3 in the YSZ is observed at the AVA / YSZ interface. Detrimental effects on YSZ phase stability and hence coating lifetime cannot be ruled out for long-term exposure and higher AVA loads. Other Non-Article Part of Journal/Newspaper Iceland German Aerospace Center: elib - DLR electronic library Eyjafjallajokull ENVELOPE(-19.633,-19.633,63.631,63.631) Journal of the American Ceramic Society 94 3 925 931 |
institution |
Open Polar |
collection |
German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
unknown |
topic |
Keramische Struktur- und Funktionswerkstoffe |
spellingShingle |
Keramische Struktur- und Funktionswerkstoffe Mechnich, Peter Braue, Wolfgang Schulz, Uwe High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay |
topic_facet |
Keramische Struktur- und Funktionswerkstoffe |
description |
High-temperature interaction of a sol-gel derived artificial volcanic ash (AVA) matching the bulk composition of the April 15, 2010 Eyjafjallajokull (Iceland) volcanic eruption with a standard 4 mol-% (7 wt-%) Y2O3-stabilized ZrO2 (YSZ) EB-PVD thermal barrier coating and a corresponding YSZ powder is investigated in order to access possible implications of similar volcanic ashes on the performance of coated turbine engine airfoils. Up to 900°C AVA deposits and EB-PVD YSZ do not show significant interaction. Viscous flow above the glass transition of AVA (Tg ~ 930 °C) yields proceeding wetting of EB-PVD YSZ coatings. At 1100 °C, the YSZ surface is covered by a dense glaze-like AVA overlay. At 1200 °C AVA is mostly infiltrating the coating, leaving a crystalline plagioclase- and hematite-type residue at the interface. Moreover, some ZrSiO4 is formed at the expense of YSZ. The overall thermochemical effects upon short-term exposure of the EB-PVD YSZ coating to a small AVA load were moderate, in particular prior to complete infiltration. On the other hand, AVA acts as a solvent for the stabilizing Y2O3 beyond 1000 °C and a progressive depletion of Y2O3 in the YSZ is observed at the AVA / YSZ interface. Detrimental effects on YSZ phase stability and hence coating lifetime cannot be ruled out for long-term exposure and higher AVA loads. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Mechnich, Peter Braue, Wolfgang Schulz, Uwe |
author_facet |
Mechnich, Peter Braue, Wolfgang Schulz, Uwe |
author_sort |
Mechnich, Peter |
title |
High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay |
title_short |
High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay |
title_full |
High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay |
title_fullStr |
High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay |
title_full_unstemmed |
High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay |
title_sort |
high-temperature corrosion of eb-pvd yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay |
publisher |
Wiley |
publishDate |
2011 |
url |
http://elib.dlr.de/69295/ |
long_lat |
ENVELOPE(-19.633,-19.633,63.631,63.631) |
geographic |
Eyjafjallajokull |
geographic_facet |
Eyjafjallajokull |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
Mechnich, Peter und Braue, Wolfgang und Schulz, Uwe (2011) High-temperature corrosion of EB-PVD yttria partially stabilized zirconia thermal barrier coatings with an artificial volcanic ash overlay. Journal of the American Ceramic Society, 94 (3), Seiten 925-931. Wiley. DOI:10.1111/j.1551-2916.2010.04166.x |
op_doi |
https://doi.org/10.1111/j.1551-2916.2010.04166.x |
container_title |
Journal of the American Ceramic Society |
container_volume |
94 |
container_issue |
3 |
container_start_page |
925 |
op_container_end_page |
931 |
_version_ |
1766041238708944896 |