Adhesion behavior of plasma sprayed thermal barrier coatings on Al-6061 and cast iron substrates

Abstract

In this work an investigation was carried out on adhesion strength and micro-hardness of plasma sprayed coatings on Al-6061 and cast iron substrate materials. For the adhesion test, ASTM C633, and for the micro hardness, ASTM E384 standards were used. From the results obtained it was found that the main failure locations were in the bond coat-substrate interface, which is considered as adhesion strength. The various parameters affecting adhesion strength are also discussed.

Key words： adhesion strength; micro-hardness plasma spraying; thermal barrier coating

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