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Browsing by Author "Chalk, Christine"

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Estimation of thermal barrier coating fracture toughness using integrated computational materials engineering

Geng, Xibo; Wellman, Richard; Arrom, Luis Isern; Chalk, Christine; Castelluccio, Gustavo M. (Elsevier, 2023-05-15)

The fracture toughness of thermal barrier coatings (TBC) is a critical mechanical property that governs damage resistance. Catastrophic delamination of TBC under erosion conditions occurs in TBC with low toughness. Prior ...
Modelling evaporation in electron‑beam physical vapour deposition of thermal barrier coatings

Chevallier, Julie; Isern, Luis; Almandoz Forcen, Koldo; Chalk, Christine; Nicholls, John R. (Springer, 2021-08-18)

This work presents computational models of ingot evaporation for electron-beam physical vapour deposition (EB-PVD) that can be applied to the deposition and development of thermal barrier coatings (TBCs). TBCs are insulating ...
Non-destructive thickness measurement of thermal barrier coatings using terahertz radiation

Isern, Luis; Waddie, Andrew J.; Chalk, Christine; Moore, Andrew J.; Nicholls, John R. (Springer, 2021-08-06)

A non-destructive thickness measurement technique based on terahertz (THz) reflectivity was successfully deployed to interrogate 7 wt.% yttria-stabilised zirconia thermal barrier coatings (TBCs) produced by electron-beam ...
Strain tolerance evolution of EB-PVD TBCs after thermal exposure or CMAS attack

Gao, Zhaohe; Zhang, Xun; Chen, Ying; Chalk, Christine; Nicholls, John; Brewster, Gyaneshwara; Xiao, Ping (Elsevier, 2023-08-28)

The microstructural evolution and Young’s modulus evolution of EB-PVD TBCs upon thermal exposure and separately after CaO-MgO-Al2O3-SiO2 (CMAS) attack have been compared and investigated. Moduli measured by four methods ...
A study of pulsed thermography for life assessment of thin EB-PVD TBCs undergoing oxidation ageing

Tinsley, Lawrence; Chalk, Christine; Nicholls, John R.; Mehnen, Jorn; Roy, Rajkumar (Elsevier, 2017-08-03)

This paper presents an assessment of ageing for thin Thermal Barrier Coatings (TBC) using active thermography. As TBCs undergo ageing during their service life, sintering changes the porosity, elements migrate from the ...
Terahertz optical thickness and birefringence measurement for thermal barrier coating defect location

Waddie, Andrew J.; Schemmel, Peter J.; Chalk, Christine; Isern, Luis; Nicholls, John R.; Moore, Andrew J. (Optical Society of America, 2020-10-06)

We present a normal incidence terahertz reflectivity technique to determine the optical thickness and birefringence of yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs). Initial verification of the method ...
Thermal insulation of YSZ and erbia-doped yttria-stabilised zirconia EB-PVD thermal barrier coating systems after CMAS attack

Boissonnet, Germain; Chalk, Christine; Nicholls, John R.; Bonnet, Gilles; Pedraza, Fernando (MDPI, 2020-10-01)

The impact of small deposits of calcium–magnesium–aluminium silicates (CMAS) on the top of thermal barrier coatings (TBCs) made of yttria-stabilised zirconia (YSZ) produced via electron-beam physical vapour deposition ...

Browsing by Author "Chalk, Christine"

Browsing by Author "Chalk, Christine"

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