Chemically Vapor Deposited Yttria-stabilized Zirconia (ysz) for Thermal and Environmental Barrier Coating
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Chemically Vapor Deposited Ysz for Thermal Amd Environmental Barrier Coatings
Yttria-stabilized zirconia (YSZ) has been used as a thermal/environmental barrier coating for gas turbine engine blades. Current methods of fabrication include air plasma spraying (APS) and electron-beam physical vapor deposition (EB-PVD). The APS technique results in a coating that loses effectiveness with thermal cycling. The EB-PVD technique deposits a columnar microstructure which accommoda...
متن کاملModeling of Chemical Vapor Deposited Zirconia for Thermal Barrier and Environmental Barrier Coatings
Thermal and environmental barrier coatings are important components of current and future energy systems. Such coatings – applied to hot, metallic surfaces in combustors, heat exchanger and turbines – increase the allowable operating temperature and increase the efficiency of the energy system. Because of its low thermal conductivity and high thermal expansion yttria-stabilized zirconia (YSZ) i...
متن کاملThe Vapor Deposition and Oxidation of Platinum- and Yttria-Stabilized Zirconia Multilayers
Attempts to increase the gas temperature within gas turbine engines are driving the development of thermal barrier coatings that reduce superalloy component oxidation rates by disrupting thermal transport processes. Novel metal–ceramic multilayer’s combining thin metal layers with low thermal conductivity oxide ceramics offer a potential approach for impeding both the radiative and conductive t...
متن کاملIn situ Particle Generation and Splat Formation During Solution Precursor Plasma Spraying of YttriaStabilized Zirconia Coatings
Thermal barrier coatings (TBCs) based on Yttria-stabilized Zirconia (YSZ) deposited by the solution precursor plasma spray (SPPS) technique have been claimed to exhibit superior durability compared to conventional plasma spraying and even electron-beam physical vapor deposition. This has been attributed to the interesting features, like vertical cracks, nanosized pores, and fine splats that are...
متن کاملKinetic Monte Carlo Simulation of Oxygen and Cation Diffusion in Yttria-stabilized Zirconia
Yttria-stabilized zirconia (YSZ) is of interest to the aerospace community, notably for its application as a thermal barrier coating for turbine engine components. In such an application, diffusion of both oxygen ions and cations is of concern. Oxygen diffusion can lead to deterioration of a coated part, and often necessitates an environmental barrier coating. Cation diffusion in YSZ is much sl...
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