NDI of interfaces in coating systems using digital interferometry

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

Authors

Mário A. P. Vaz (Author) FEUP; Jaime Monteiro (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

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences

Other information

Authenticus ID: P-000-YBW

DOI: 10.1016/s0167-6636(00)00050-8

Abstract (EN): This payer 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 Binge pattern is modified 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 definition 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