Nondestructive measurement of porosity in thermal barrier coatings

Porosity is an integral part of thermal barrier coatings (TBC) and is required to provide thermal insulation and to accommodate operational thermal stresses. The effective use of TBC in hot-section components of aircraft engines requires nondestructive testing (NDT) methods to detect porosity variat...

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Published in:Journal of thermal spray technology 2003-12, Vol.12 (4), p.530-535
Main Authors: ROGE, B, FAHR, A, GIGUERE, J. S. R, MCRAE, K. I
Format: Article
Language:English
Subjects:
Aircraft components
Capacitance
Coating
Cross-disciplinary physics: materials science
rheology
Eddy current testing
Exact sciences and technology
Materials science
Materials testing
Nondestructive testing
Nondestructive testing: electromagnetic testing, eddy-current testing
Physics
Porosity
Risk
Risk reduction
Thermal barrier coatings
Thermal insulation
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container_end_page 535
container_issue 4
container_start_page 530
container_title Journal of thermal spray technology
container_volume 12
creator ROGE, B
FAHR, A
GIGUERE, J. S. R
MCRAE, K. I
description Porosity is an integral part of thermal barrier coatings (TBC) and is required to provide thermal insulation and to accommodate operational thermal stresses. The effective use of TBC in hot-section components of aircraft engines requires nondestructive testing (NDT) methods to detect porosity variations and measure thickness changes to reduce the risk of damage to the coating due to such variations. The eddy current method has been used to measure the thickness of a plasma-sprayed TBC coating and either ultrasonic or capacitance techniques have been applied to assess porosity content based on thickness values obtained using the eddy current tests. The porosity values estimated by the NDT methods have been confirmed by destructive testing, which included metallography and vacuum volumetric measurement using nitrogen absorption.[PUBLICATION ABSTRACT]
doi_str_mv 10.1361/105996303772082279
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source Springer Nature
subjects Aircraft components
Capacitance
Coating
Cross-disciplinary physics: materials science
rheology
Eddy current testing
Exact sciences and technology
Materials science
Materials testing
Nondestructive testing
Nondestructive testing: electromagnetic testing, eddy-current testing
Physics
Porosity
Risk
Risk reduction
Thermal barrier coatings
Thermal insulation
title Nondestructive measurement of porosity in thermal barrier coatings
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