YSZ-Polyester Abradable Coatings Manufactured by APS
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JTTEE5 25:252–263 DOI: 10.1007/s11666-015-0358-4 1059-9630/$19.00 ASM International
YSZ-Polyester Abradable Coatings Manufactured by APS Delphine Aussavy, Rodolphe Bolot, Ghislain Montavon, Franc¸ois Peyraut, Gregory Szyndelman, Julien Gurt-Santanach, and Serge Selezneff (Submitted May 20, 2015; in revised form November 10, 2015) Abradable seals are used in aircraft engine compressor and turbine to decrease fuel consumption. Their role is to minimize the clearance between the rotating blades of an engine rotor and the casing to reduce air leakages (compressor) or air-fuel combustion product leakages (turbine). Operating temperatures in turbines (up to 1800 °C) can induce a thermal expansion of the blades and give rise to contacts providing damages to the blades or casing. Thus, in case of contact, the blade should remove the abradable seals applied to the casing without being damaged. Besides, the seal must be resistant to the turbine environment. Direct relationships have been observed between plasma spray operating parameters and abradable coating performances. The aim of this study is to determine those relationships for YSZPolyester abradable composite coatings. This study is conducted within the framework of the 7FP European project E-BREAK to reach the environmental objectives of the European Advisory Council for Aviation Research and innovation.
Keywords
abradable coating, atmospheric plasma spray (APS), composites, image analysis, modeling of properties, yttria-stabilized zirconia (YSZ)
1. Introduction Compliance with environmental regulations is a major driving force for innovations and breakthroughs in all technological sectors. In the European aeronautic/aerospace industry, the objectives related to technological innovations are defined by the Horizon 2020 program released by the Advisory Council for Aviation Research and innovation in Europe (ACARE). These objectives are mostly related to decreases in the specific fuel consumption, carbon dioxide (50%), and nitrogen dioxide emissions (80%) (Ref 1). In 1990, several European companies manufacturing aero engines created the Engine Industry Management Group (EIMG), in order to implement collaborative projects to reach the ACARE objectives. The present study takes place in the frame of one of those projects, named E-BREAK (Engine Breakthrough components and subsystems), a 7th Framework This article is an invited paper selected from presentations at the 2015 International Thermal Spray Conference, held May 11-14, 2015, in Long Beach, California, USA, and has been expanded from the original presentation. Delphine Aussavy, Rodolphe Bolot, Ghislain Montavon, and Franc¸ois Peyraut, UBFC, IRTES-LERMPS, UTBM, Belfort, France; Gregory Szyndelman, Oerlikon Metco, Wohlen, Switzerland; Julien Gurt-Santanach, Safran Turbomeca, Bordes, France; and Serge Selezneff, Safran Snecma, Moissy-Cramayel, France. Contact e-mail: [email protected].
252—Volume 25(1-2) January 2016
program involving 41 companies and research institutions throughout Europe (Ref 2). S
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