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

Yang, Shanjie, Song, Wenjia, Lavallee, Yan ORCID: 0000-0003-4766-5758, Zhou, Xin, Dingwell, Donald B and Guo, Hongbo (2020) Dynamic spreading of re-melted volcanic ash bead on thermal barrier coatings. CORROSION SCIENCE, 170. p. 108659.

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Official URL: http://dx.doi.org/10.1016/j.corsci.2020.108659

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 °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 °C. These findings are critical for understanding the corrosion mechanism of TBC in contaminated environments.

Item Type:	Article
Uncontrolled Keywords:	Thermal barrier coatings (TBC), Volcanic ash, Spreading, Infiltration, Subsurface lateral flow
Depositing User:	Symplectic Admin
Date Deposited:	01 Jul 2020 09:14
Last Modified:	18 Jan 2023 23:47
DOI:	10.1016/j.corsci.2020.108659
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3092264