Application of thermal spray technologies in the field of energy conversion and aviation
Robert Vaßen, Forschungszentrum Jülich, Jülich, GermanyGeorg Mauer, Forschungszentrum Jülich, Jülich, GermanyDaniel Emil Mack, forschungszentrum Jülich , Jülich, GermanyOlivier Guillon, Forschungszentrum Jülich, Jülich, Germany
Thermal spray technologies are intensively used for the deposition of advanced coating systems in various fields. The talk will give a brief overview on developments in the energy and aviation sector made in Jülich. A major research topic both in the energy and aviation field is the development of advanced thermal barrier coatings including both improved coating microstructures as columnar or new materials beyond the standard zirconia as gadolinium zirconate.
Furthermore, the development of smart coatings including self-healing features or those with sensoric capability is addressed. Recently, also the development of so-called environmental barrier coatings (EBCs) is becoming a major research topic. Some examples of these protective coating systems for ceramic matrix composites (CMCs) will be presented. Thermal spray techniques are also used in solid oxide fuel cell stacks for the coating of interconnects as an efficient protection barrier against chrome evaporation.
Advanced kinetic, i.e., high velocity, methods such as cold gas spraying are applied as repair processes to restore damaged parts; examples from aviation industry will be given. As a final example, the development of graded tungsten/steel coatings deposited by vacuum plasma spraying will be shown. These coatings are promising structures for an application as first wall material in fusion reactors.