Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/94698
Author(s): J. F. Silva Gomes
J. M. Monteiro
M. A. P. Vaz
Title: NDI of Interfaces in Coating Systems Using Digital Interferometry
Issue Date: 2000
Abstract: 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. Debondingis detected by properly exciting the surface of the object under inspection in such a way that the interferencefringe pattern is modi®ed rendering the disbond readily visible. The fringe patterns resulting from the associated imageswere captured using electronic speckle pattern interferometry (ESPI) and shearography. Image processing techniquesare applied to enhance the detection and better de®nition of the debonded layer. Some results and discussions arepresented to illustrate the applicability of these two optical techniques to thermal barrier coatings.
Subject: Engenharia mecânica
Mechanical engineering
URI: https://repositorio-aberto.up.pt/handle/10216/94698
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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