Dynamic spreading of re-melted volcanic ash bead on thermal barrier coatings

Yang, Shanjie; Song, Wenjia; Lavallee, Yan; Zhou, Xin; Dingwell, Donald B. und Guo, Hongbo (2020): Dynamic spreading of re-melted volcanic ash bead on thermal barrier coatings. In: Corrosion Science, Bd. 170, 108659

Abstract

Dynamic spreading of 1 mm diameter volcanic ash bead on thermal barrier coatings (TBCs) surfaces and the infiltration and subsurface lateral flow of these melts within TBCs were quantitatively investigated at 1200-1600 degrees C for 1-10000 min. The spreading areas, infiltration depths and lateral flow distances are controlled by melt viscosity, coating surface roughness and microstructures. The lateral flow along the inter-column of the coating was dramatically accelerated at higher temperature with a diffusion distance of more than 5.3 mm within 1 min at 1600 degrees C. These findings are critical for understanding the corrosion mechanism of TBC in contaminated environments.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• ISSN: 0010-938X
• Sprache: Englisch