Suspension plasma spray TBC applied on gas turbine components
June 24-29, 2018
The great industrial interest in improving the performances of thermal barrier coatings (TBC) results in new investigations and insights on Suspension Plasma Spray (SPS) technology.
The main feature of SPS is that powder feedstock is suspended within a solvent such as water or ethanol. The solvent acts as a carrier medium, enabling fine powder to be transported and injected into the plasma stream for processing. The fine scale of the powder particles used in SPS allows for a great range of coating microstructures to be produced.
The aim of the present work was to test and compare different type of microstructures applied by SPS using an ethanol-based suspension. In particular, this investigation focused on micro-porous and columnar TBCs.
Spraying parameters have been developed to increase the standoff distance and the process stability, which are the main limits of SPS so far.
SPS TBCs were characterized by means of microstructural investigation, x-ray diffraction, bond strength and thermal cycling test.
Please click Additional Files below to see the full abstract.
Francesco Bozza, Simone Bursich, Nelso Antolotti, and Omar Ligabue, "Suspension plasma spray TBC applied on gas turbine components" in "Thermal Barrier Coatings V", Prof. Dr. Robert Vaßen, Forschungszentrum Jülich GmbH, Germany Brian Hazel, Pratt & Whitney, USA Prof. Dr. Uwe Schulz, German Aerospace Center, Germany Dr. Michael J. Maloney, Pratt & Whitney, USA Dr. Ram Darolia, GE Aviation (Retired), USA Eds, ECI Symposium Series, (2018). http://dc.engconfintl.org/tbcv/91