RESEARCH OF PLASMA SPRAYING OF THE ZRO2 – Y2O3 ELECTROLYTE COATINGS / ZRO2 – Y2O3 ELEKTROLITINIŲ DANGŲ PLAZMINIO PURŠKIMO TYRIMAS
نویسندگان
چکیده
منابع مشابه
Mullite and Mullite/ZrO2-7wt.%Y2O3 Powders for Thermal Spraying of Environmental Barrier Coatings
Mullite and mullite/ZrO2-7wt.%Y2O3 coatings could be thought among the main protective layers for environment barrier coatings (EBCs) to protect Si-based substrates in future gas turbine engines. Considering that feedstock of the compound powder is not commercially available, two powder processing routes Spray Drying (SD) and Flame Spheroidization (FS) were implemented for both types of powders...
متن کاملCorrosion mechanisms of ZrO2-Y2O3 thermal barrier coatings in the presence of molten middle-east sand
The deposition of mineral debris in the turbine sections of various jet engines occurred after operation on Middle-East routes. Plasma sprayed Zr02-Yn03 thermal barrier coatings were aged with sand samples from several Middle-East locations at temperatures of 1200 to 1500 OC. At temperatures above 1400 OC, the molten sand formed glassy silicate debris that penetrated the ceramic coating complet...
متن کاملEnhanced oxygen diffusivity in interfaces of nanocrystalline ZrO2.Y2O3.
First measurements of oxygen grain boundary diffusion coefficients in nanocrystalline yttria-doped ZrO(2) (n-ZrO(2).6.9 mol % Y(2)O(3)) are presented. The (18)O diffusion profiles measured by secondary ion mass spectroscopy are much deeper in the nanocrystalline specimens than in single crystals. An oxygen diffusivity, D(B), in the grain boundaries can be deduced, which is approximately 3 order...
متن کاملThermal Conductivity, Phase Stability, and Oxidation Resistance of Y3Al5O12 (YAG)/Y2O3–ZrO2 (YSZ) Thermal-Barrier Coatings
This paper describes a new multilayer TBC that incorporates a 10 μm-thick oxygen barrier layer of yttrium–aluminum garnet (YAG) into a typical YSZ TBC system. The thermal conductivity of as-sprayed YAG/YSZ coatings was reduced due to excessive porosity and amorphous areas in the YAG layer. After long-term heat treatments, the conductivity of the multilayer was unaffected by the presence of YAG....
متن کاملIn Situ FT-IR Spectroscopic Study of CO2 and CO Adsorption on Y2O3, ZrO2, and Yttria-Stabilized ZrO2
In situ FT-IR spectroscopy was exploited to study the adsorption of CO2 and CO on commercially available yttria-stabilized ZrO2 (8 mol % Y, YSZ-8), Y2O3, and ZrO2. All three oxides were pretreated at high temperatures (1173 K) in air, which leads to effective dehydroxylation of pure ZrO2. Both Y2O3 and YSZ-8 show a much higher reactivity toward CO and CO2 adsorption than ZrO2 because of more fa...
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ژورنال
عنوان ژورنال: Mokslas – Lietuvos ateitis
سال: 2015
ISSN: 2029-2341,2029-2252
DOI: 10.3846/mla.2014.764