Evaluation of Plasma Deposited Alumina-Titania Ceramic Composite Coatings

Plasma sprayed ceramic composites are being used in a growing number of applications despite requiring post-treatment to obtain desired properties. This paper evaluates plasma sprayed alumina-titania coatings both as-deposited and after microwave processing. In each case, the physical (porosity), mechanical (hardness and adhesive tensile strength), and functional (wear resistance) properties are measured. It is shown that the evaluation techniques can be used to determine the quality of the layers at any stage of production. The experimental procedures are briefly described and the results discussed using multiple illustrations. Paper includes a German-language abstract.