Quantitative infrared thermographic nondestructive testing of thermal barrier coatings

S. Marinetti, V. Vavilov, P. G. Bison, E. Grinzato, F. Cernuschi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In power production and aviation, thermal barrier coatings are widely used to improve performance of turbine blades. During deposition of plasma sprayed coatings, some discontinuities might appear to affect the ability of turbine blades to withstand high temperatures and protect primary parts. Thermal testing systems are increasingly used in the testing of thermal barrier coatings due to large surface, rapid and noncontact testing capabilities. In this work, the features of the thermal nondestructive testing (NDT) of thermal barrier coatings are summarized and current problems, such as residual heating, spurious reflections and coating transparency, are addressed. The experimental data are presented along with advanced processing results obtained by using pulse phase thermography and principal component analysis. The comparison of the processing techniques is done in the detection of delaminations between the coating and substrate. The problem of the discrimination between the coating thickness variations and delaminations, as well as the sensitivity of thermal NDT, is discussed.

Original languageEnglish
Pages (from-to)773-780
Number of pages8
JournalMaterials Evaluation
Volume61
Issue number6
Publication statusPublished - Jun 2003

Fingerprint

Thermal barrier coatings
Nondestructive examination
Infrared radiation
Delamination
Coatings
Turbomachine blades
Testing
Turbines
Sprayed coatings
Processing
Principal component analysis
Transparency
Aviation
Plasmas
Heating
Substrates
Hot Temperature
Temperature

Keywords

  • Delamination
  • Infrared thermographic NDT
  • Thermal barrier coating

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

Cite this

Marinetti, S., Vavilov, V., Bison, P. G., Grinzato, E., & Cernuschi, F. (2003). Quantitative infrared thermographic nondestructive testing of thermal barrier coatings. Materials Evaluation, 61(6), 773-780.

Quantitative infrared thermographic nondestructive testing of thermal barrier coatings. / Marinetti, S.; Vavilov, V.; Bison, P. G.; Grinzato, E.; Cernuschi, F.

In: Materials Evaluation, Vol. 61, No. 6, 06.2003, p. 773-780.

Research output: Contribution to journalArticle

Marinetti, S, Vavilov, V, Bison, PG, Grinzato, E & Cernuschi, F 2003, 'Quantitative infrared thermographic nondestructive testing of thermal barrier coatings', Materials Evaluation, vol. 61, no. 6, pp. 773-780.
Marinetti, S. ; Vavilov, V. ; Bison, P. G. ; Grinzato, E. ; Cernuschi, F. / Quantitative infrared thermographic nondestructive testing of thermal barrier coatings. In: Materials Evaluation. 2003 ; Vol. 61, No. 6. pp. 773-780.
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