Factors Affecting the Performance of Thermal Barrier Coatings in the Presence of V2O5 and Na2SO4
2016 (English)In: JOURNAL OF CERAMIC SCIENCE AND TECHNOLOGY, ISSN 2190-9385, Vol. 7, no 4, 409-415 p.Article in journal (Refereed) Published
This study investigates the influence of temperature, salt concentration and thickness on the corrosion resistance of seven YSZ thermal barrier coatings in the presence of V2O5 and Na2SO4. For this study, a thick, high-porosity APS coating (670 gm) using hollow spherical powder (HOSP) and a thin, low-porosity APS coating (300 pm) using agglomerated and sintered (Aamp;S) powder were fabricated. Corrosion tests were conducted at 750 degrees C and 900 degrees C with a mixture of Na2SO4 and V2O5 for four hours. At each temperature, salt concentrations of 4,10 and 20 mg/cm(2) were used. SEM and XRD investigations after the corrosion tests revealed that a combination of low temperature and high salt concentration resulted in higher corrosion-induced damage to the thin TBC coatings. With regard to the thick TBC coatings, all except one sample failed during the corrosion test. This suggests that thick TBC coatings with higher porosity may not be suitable in corrosive environments.
Place, publisher, year, edition, pages
GOLLER VERLAG GMBH , 2016. Vol. 7, no 4, 409-415 p.
HOSP; agglomerated and sintered YSZ; hot corrosion; TBC
IdentifiersURN: urn:nbn:se:liu:diva-134310DOI: 10.4416/JCST2016-00058ISI: 000391246300013OAI: oai:DiVA.org:liu-134310DiVA: diva2:1071682
Funding Agencies|Vinnova, Sweden2017-02-062017-02-032017-02-16Bibliographically approved