Robot-aided tailoring of flame spray coatings for high-temperature barrier application

Abstract

The flame spraying of refractory ceramics such as alumina is a promising technique for the modification of manifold substrate materials for high-temperature application. Its high potential for automation and feedstock design allows for swift adaption to variable demands. Consequentially, a tailoring of flame-sprayed barrier coatings can be realised in terms of the phase composition and the mechanical performance. In order to isolate the effects of the addition of zirconia and titania, as well as the coating thickness, the present study focused the biaxial flexure of self-supporting flame-sprayed alumina bodies, produced by a fully automated and robot-aided flame spray station (on the lab-scale).