Preparation of and porosity measurements on oxidic APS spray coatings

Zirconium oxide coatings for application in the field of turbine construction have to exhibit certain properties in order to meet high temperature requirements. One of the most important properties is the porosity, for it provides a thermal insulation of the coated material. For this reason, the porosity is routinely determined as quality parameter for spray coatings which helps determining their suitability for a particular application. The following work summarizes the results of the round robin test ''Preparation of and Porosity Measurements on Oxidic APS Spray Coatings'' by the DGM working group ''Preparation''.