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Tailorable shielded compliance of thermal barrier coatings through laser texturing and microstructural modification: microfeature design and validation

Bogatyrev, Artem; Liao, Zhirong; Axinte, Dragos; Norton, Andy

Tailorable shielded compliance of thermal barrier coatings through laser texturing and microstructural modification: microfeature design and validation Thumbnail


Authors

Artem Bogatyrev

DRAGOS AXINTE dragos.axinte@nottingham.ac.uk
Professor of Manufacturing Engineering

Andy Norton



Abstract

Thermal barrier coatings (TBCs) are widely used for protecting components from an aggressive environment and excessive temperatures. However, the top coat can lack thermal compliance and environmental resistance, promoting premature failure. This study provides an approach to design, produce, and evaluate the novel shielded-compliant TBCs to address these challenges. Top coat laser grooving can lower thermal mismatch levels and hinder crack propagation, whereas laser glazing can enhance strength and anti-corrosion performance. Material analysis for the glazed layer revealed large columnar grains alongside a stress-free structure compared to the as-sprayed coating. The digital image correlation (DIC) in-situ heating test showed vertical cracks after glazing already to be effective stress relief features, with the controlled grooves showing the most prominent compliance, as suggested by finite element analysis (FEA). Such a concept may be applied to any coating where increased thermal compliance or environmental protection is needed, making it a highly versatile tool.

Citation

Bogatyrev, A., Liao, Z., Axinte, D., & Norton, A. (2023). Tailorable shielded compliance of thermal barrier coatings through laser texturing and microstructural modification: microfeature design and validation. Journal of the European Ceramic Society, 43(8), 3704-3726. https://doi.org/10.1016/j.jeurceramsoc.2023.02.035

Journal Article Type Article
Acceptance Date Feb 13, 2023
Online Publication Date Mar 13, 2023
Publication Date 2023-07
Deposit Date May 9, 2023
Publicly Available Date Mar 28, 2024
Journal Journal of the European Ceramic Society
Print ISSN 0955-2219
Publisher Elsevier BV
Peer Reviewed Peer Reviewed
Volume 43
Issue 8
Pages 3704-3726
DOI https://doi.org/10.1016/j.jeurceramsoc.2023.02.035
Keywords Thermal barrier coating; Thermal compliance; Laser treatment; Top coat glazing; Digital image correlation
Public URL https://nottingham-repository.worktribe.com/output/17386549
Publisher URL https://www.sciencedirect.com/science/article/pii/S0955221923001255
Additional Information This article is maintained by: Elsevier; Article Title: Tailorable Shielded Compliance of Thermal Barrier Coatings through Laser Texturing and Microstructural Modification: Microfeature Design and Validation; Journal Title: Journal of the European Ceramic Society; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.jeurceramsoc.2023.02.035; Content Type: article; Copyright: © 2023 The Authors. Published by Elsevier Ltd.

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