The photoacoustic detection of subsurface defects in metallic plasma coatings on metallic
substrates has been achieved. The investigation is performed with samples that contain well …

Measurements were made of the attenuation in thin samples of plasma-sprayed
molybdenum, nickel aluminide and aluminium in the frequency range 2.5–15 MHz. It was …

Ultrasonic methods are developed for characterizing plasma-sprayed coatings. First,
ultrasonic spectroscopy is used to determine the acoustic properties of various plasma …

Multichannel acoustic emission (AE) measurements by four laser interferometers were
developed and applied during a plasma-spray coating process that is known as being a …

Thermally sprayed coating are usually tested destructively, ie metallo-graphically or by
applying various strength tests. In most cases the results of non-destructive testing NDT …

Acoustic emission techniques have recently been used in a number of studies to investigate
the performance and failure behavior of plasma-sprayed thermal barrier coatings. Failure of …

Résumé Les résultats expérimentaux présentés montrent que les techniques
photothermiques peuvent être utilisées avec profit pour l'évaluation de la qualité d'un …

Numerous cracks can be observed in the top coat of thermal barrier coatings (TBCs)
deposited by the atmospheric plasma spraying (APS) method. These cracks can be …

A study examining the application of ultrasonic testing to plasma sprayed coatings is
presented. It is shown that bonding defects in aluminium and molybdenum coated samples …

Scanning acoustic microscopy (SAM) is a relatively new non-destructive technique, which
uses sound to create visual images of variations in the mechanical properties of samples …