This study evaluates a nondestructive method for determining the adhesion strength and porosity of thermally sprayed coatings. The method is based on ultrasonic surface echo measurements. Porosity is surmised by the impedance of the coating and adhesion by the transmission coefficient. Experimental results confirmed that the method is effective for its intended use.

adhesion, porosity, thermal sprayed coating, transmission coefficient, ultrasonic surface echo method
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Copyright © 1998 ASM International. All rights reserved.
1998
ASM International
Topics
Thermal spray coatings Bonding strength Pulse echo ultrasonic method
Issue Section:
Diagnostic of Jets and Coatings: Processes and Products Quality Control
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