Suspension spraying allows to create special coatings, which were only possible with expensive vacuum technologies in the past:
- With a suitable choice of the coating parameters columnar growing and porous coatings can be made.
- These coatings are used as thermal barrier coatings for gas turbines and jet engines.
[Cross section of a thermal barrier coating: high porosity]
Source: A. Killinger,P. Müller and R. Gadow,
High Velocity Suspension Flame Spraying and Suspension Plasma Spraying of Oxide ceramics
in: Thermal Spray 2012: Proceedings of the International Thermal Spray Conference (May 21-24, 2012, Houston, Texas, USA),
Eds: Basil R. Marple, Arvind Agarwal, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and André McDonald,
ASM International, 2012
[Side view of a thermal barrier coating: columnar growth]
Forschungszentrum Jülich, N. Schlegel