Title
The Role Of The Surface Morphology And Segmented Cracks On The Damage Forms Of Laser Re-Melted Thermal Barrier Coatings In Presence Of A Molten Salt (Na2So4 + V2O5)
Keywords
A. Ceramic; A. Molten salts; C. High temperature corrosion; C. Intergranular corrosion; C. Oxidation
Abstract
Hot corrosion behaviour of yttria-stabilized zirconia thermal barrier coatings (TBCs) with various segmented cracks and surface morphologies, obtained using ultrasonic-assisted laser re-melting, was investigated during exposure to Na2SO4 + V2O5salt at 1100 °C. It is demonstrated, that the damage types of TBCs were significantly affected by segmented cracks and surface morphology. Four main damage mechanisms: (i) chemical reaction, (ii) Coefficient thermal mismatch stress, (iii) oxidation of bond coating and (iv) intergranular corrosion, based on the observed transport behaviour of oxygen and molten salt, stress-tolerance and self-healing of various segmented cracks, were discussed to account for the failure behaviour.
Publication Date
2-1-2017
Publication Title
Corrosion Science
Volume
115
Number of Pages
56-67
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1016/j.corsci.2016.11.011
Copyright Status
Unknown
Socpus ID
85006810370 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/85006810370
STARS Citation
Fan, Zhengjie; Wang, Kedian; Dong, Xia; Wang, Rujia; and Duan, Wenqiang, "The Role Of The Surface Morphology And Segmented Cracks On The Damage Forms Of Laser Re-Melted Thermal Barrier Coatings In Presence Of A Molten Salt (Na2So4 + V2O5)" (2017). Scopus Export 2015-2019. 6011.
https://stars.library.ucf.edu/scopus2015/6011