Novel thermal barrier coatings with hexagonal boron nitride additives resistant to molten volcanic ash wetting

Lokachari, Siddharth, Song, Wenjia, Fukumoto, Masahiro, Lavallée, Yan ORCID: 0000-0003-4766-5758, Guo, Hongbo, You, Yancheng and Dingwell, Donald B (2020) Novel thermal barrier coatings with hexagonal boron nitride additives resistant to molten volcanic ash wetting. Corrosion Science, 168. p. 108587.

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Official URL: http://dx.doi.org/10.1016/j.corsci.2020.108587

Abstract

Yttria-stabilized zirconia thermal barrier coatings (YSZ TBCs) are prone to degradation by atmospheric contaminants such as volcanic ash, posing a serious threat to their durability. Here we demonstrate that hexagonal boron nitride (h-BN) additives to YSZ coatings (h-BN YSZ), exhibit resistance against volcanic ash interaction at 1250 °C. In preliminary tests performed under vacuum, h-BN YSZ coatings demonstrate greatly inhibited wetting against molten volcanic ash drops. Under oxidizing conditions, h-BN YSZ provide enhanced wetting and chemical resistance over conventional coatings. This study lays groundwork for the development of novel additives which are physico-chemically resilient against molten volcanic ash wetting.

Item Type:	Article
Uncontrolled Keywords:	Thermal barrier coatings, Hexagonal boron nitride, Volcanic ash, Non-wetting, Silica-phobicity
Depositing User:	Symplectic Admin
Date Deposited:	23 Mar 2020 09:49
Last Modified:	18 Jan 2023 23:57
DOI:	10.1016/j.corsci.2020.108587
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3080209