Acoustic Microscopy: Pictures to Ponder

Briggs, G. A. D.; Gundle, R; Lawrence, Charles Wilson; Rodríguez-Rey, A.; Scruby, C. B.

doi:10.1007/978-3-642-84810-0_10

Cited by 18 publications

(26 citation statements)

References 11 publications

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“…The ultra-short ultrasonic pulse method is specified mostly for in-depth examinations of materials [2][3][4]. The input signal is a single narrow pulse and the returning signal is generally a succession of the echoes.…”

Section: Methodsmentioning

confidence: 99%

“…Distortion of the ultrasonic beam will take place if the interface is curved within the ultrasonic beam width. This distorts the geometry of the displayed structure, smears the resolution, and in the extreme case, can rise to duplicate image artifacts [4]. In the inspection of objects with a curved surface, the pulse interacts with complicated environments, the pulse spectral decomposition and synthesis is inapplicable because of difficulties associated with the response to each spectral component.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thickness Measurements of Curved Multi-Layered Polymer System Using Ultrasonic Pulse-Echo Method

Maev

Shao

Maeva

1998

Review of Progress in Quantitative Nondestructive Evaluation

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thickness Measurements of Curved Multi-Layered Polymer System Using Ultrasonic Pulse-Echo Method

Maev

Shao

Maeva

1998

Review of Progress in Quantitative Nondestructive Evaluation

View full text Add to dashboard Cite

“…The ultra-short ultrasonic pulse method is designed mainly for in-depth examinations of materials [2][3][4]. The input signal is a single narrow pulse and the returning signal is generally a succession of the echoes.…”

Section: Methodsmentioning

confidence: 99%

Imaging of Deep Internal Layers in Layered Polymer Systems Using the Ultra-Short Pulse Acoustic Microscope

Maev

Pyshnyi

Maeva

et al. 1997

Review of Progress in Quantitative Nondestructive Evaluation

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“…More advanced methods, based on electrical potential, electrical impedance or acoustic properties of the coating are Scanning Kelvin Probe (SKP) [25 -27], Electrochemical Impedance Spectroscopy (EIS) [6,27,28] and Scanning Acoustic Microscopy (SAM) [25,26,29], respectively. However, a combination of different methods can provide complementary information [13,30,31].…”

Section: Introductionmentioning

confidence: 99%

Investigation of delamination mechanisms in polymer coatings by scanning acoustic microscopy

Alig¹,

Bargmann²,

Oehler³

et al. 2010

J. Phys. D: Appl. Phys.

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Scanning acoustic microscopy (SAM) was used to investigate disbonding, delamination and blister formation in polymer coatings for different layer structures and initial defect depths during exposure to a corrosive environment. The time evolution of disbonding and blister initiation and their growth was investigated by analysing the SAM images exposure to an electrolyte solution (Harrison solution). From investigations of a model system of coatings on steel substrates, it was possible to differentiate between water and/or ion transport (i) through the coating and (ii) along the coating-steel interface. For samples without clear coat randomly distributed blisters appeared at the coating-steel interface after exposure to the electrolyte solution, irrespective of the location of initial defects. The random distribution of growing blisters is related to diffusion of water and/or ions through the coating and "nucleation" at weak points of the substrate or within the polymer. For samples with clear coat a propagating migration front along the coating-steel interface of 3-4 µm height -starting from initial defects -was detected. The linear propagation of this front cannot be explained by Fickian diffusion. Therefore, it is discussed in terms of an accelerated diffusion or crack growth kinetics. Since blistering starts only at sites, where the migration front has passed, the presence of a thin water layer at the coating-steel interface, the loss of adhesion and the following corrosive processes are prerequisites for the nucleation of blisters. The blister growth shows a square-root time dependence which was related to a diffusion controlled transport mechanism.

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Acoustic Microscopy: Pictures to Ponder

Cited by 18 publications

References 11 publications

Thickness Measurements of Curved Multi-Layered Polymer System Using Ultrasonic Pulse-Echo Method

Thickness Measurements of Curved Multi-Layered Polymer System Using Ultrasonic Pulse-Echo Method

Imaging of Deep Internal Layers in Layered Polymer Systems Using the Ultra-Short Pulse Acoustic Microscope

Investigation of delamination mechanisms in polymer coatings by scanning acoustic microscopy

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