NDI of Interfaces in Coating Systems Using Digital Interferometry

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Joaquim F. Silva Gomes (Author) FEUP; J. M. Monteiro (Author) Other; Mário A. P. Vaz (Author) FEUP

Journal

Title: Mechanics of Materials

Vol. 32 No. 12

Pages: 837-843

ISSN: 0167-6636

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 9 Citations

ISI Web of Science

Scopus - 16 Citations

INSPEC

COMPENDEX

Scientific classification

CORDIS: Technological sciences > Engineering > Mechanical engineering

Other information

Authenticus ID: P-000-YBW

DOI: 10.1016/S0167-6636(00)00050-8

Abstract (EN): This paper describes a new application of two laser interferometry techniques to the non-destructive inspection (NDI) of coated surfaces. The purpose is to detect interfacial disbond between the coating and the substrate. Debonding is detected by properly exciting the surface of the object under inspection in such a way that the interference fringe pattern is modi®ed rendering the disbond readily visible. The fringe patterns resulting from the associated images were captured using electronic speckle pattern interferometry (ESPI) and shearography. Image processing techniques are applied to enhance the detection and better de®nition of the debonded layer. Some results and discussions are presented to illustrate the applicability of these two optical techniques to thermal barrier coatings.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7