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

Nondestructive methods previously developed for the detection of flaws, such as
delaminations, or for the evaluation of the elastic properties of materials, could be judiciously …

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 …

A round-robin test was implemented where nine European research institutions and
universities applied different thermal, ultrasonic, and magnetic methods for measuring the …

Porosity is an important factor in plasma-sprayed coatings, especially ceramic coatings.
Excessive poros-ity can adversely affect the performance of the coated component in …

A thermal wave technique for the non-destructive examination of plasma-sprayed coatings is
described. Measurements of molybdenum NiAl and aluminium coatings are presented to …

The heterogeneous nature of plasma-sprayed coatings plays a major role in their
mechanical properties. The fundamental deformation modes are usually classified as …

An ultrasonic, nondestructive contact measurement technique was employed to detect and
characterize the elastic anisotropy of a free-standing, plasma-sprayed alumina coating …

Over the past two decades, thermal spraying of metallic, ceramic and composite coatings
has emerged as a powerful tool for surface engineering, with many new applications and …

A study was made of the amplitude distributions of acoustic emission (AE) from several kinds
of plasma-sprayed coatings during four-point bending. A method is described whereby the …