Cuvillier Verlag

35 Jahre Kompetenz im wissenschaftlichen Publizieren
Internationaler Fachverlag für Wissenschaft und Wirtschaft

Cuvillier Verlag

De En Es
In situ generated ß-Yb₂Si₂O₇ environmental barrier coatings to protect non-oxide silicon-based ceramics in gas turbines

Printausgabe
EUR 41,88

E-Book
EUR 29,88

In situ generated ß-Yb₂Si₂O₇ environmental barrier coatings to protect non-oxide silicon-based ceramics in gas turbines (Band 16)

Mateus Lenz Leite (Autor)

Vorschau

Leseprobe, PDF (250 KB)
Inhaltsverzeichnis, PDF (78 KB)

ISBN-13 (Printausgabe) 9783736975828
ISBN-13 (E-Book) 9783736965829
Sprache Englisch
Seitenanzahl 130
Umschlagkaschierung matt
Auflage 1.
Buchreihe Schriftenreihe Keramische Werkstoffe
Band 16
Erscheinungsort Göttingen
Promotionsort Bayreuth
Erscheinungsdatum 25.02.2022
Allgemeine Einordnung Dissertation
Fachbereiche Technische Chemie und Chemieingenieurwesen
Allgemeine Ingenieurwissenschaften
Technische Mechanik, Strömungsmechanik, Thermodynamik
Fertigungs- und Produktionstechnik
Fahrzeugtechnik
Luft- und Raumfahrttechnik
Umwelttechnik
Schlagwörter Ammoniak, Beschichtung, Erdgas, Fossile Brennstoffe, Gasturbinen, Heißgaskorrosion, Keramik, Korrosion, Monolith, Nicht-oxidische, Nickelbasissuperlegierung, Oberflächentechnik, Oxidation, Physikalische Gasphasenabscheidung, Plasmaspritzen, Polymerabgeleitete Keramik, Pyrolyse, Schlicker, Seltene Erden, Seltene Erdensilikat, Si3N4, SiC, SiC/SiC, Silazan, Silicium, Siliciumcarbid, Siliciumdioxid, Siliciumnitrid, SiO2, Treibhausgasemissionen, Umweltschutzschichten, Verbrennungsvorgang, Wärmedämmschicht, Wasserdampf, Wasserstoff, Yb2Si2O7, Ytterbiumdisilikat, Ytterbiummonosilikat, Ytterbiumoxid, Yttrium-stabiliziertes Zirconiumoxid, Ammonia, Coating, Natural gas, Fossil fuels, Gas Turbines, Hot gas corrosion, Ceramics, Corrosion, Monolith, Non-oxide, Nickel-based superalloy, Surface technology, Oxidation, Physical vapor deposition, Plasmaspray, Polymer derived ceramics, Pyrolysis, Slurry, Rare-earth, Rare-earth silicates, Si3N4, SiC, SiC/SiC, Silazane, Silicon, Silicon carbide, Silica, Silicon nitride, SiO2, Greenhouse gas emissions, Environmental barrier coatings, Combustion, Thermal Barrier Coatings, Watervapor, Hydrogen, Yb2Si2O7, Ytterbium disilicate, Ytterbium monosilicate, Ytterbium oxide, Yttria stabilized zirconia, keramische Matrix, ceramic matrix, thermische Ausdehnung, thermal expansion, Weibull-Modul, Wasserdampfpartialdruck, water vapor partial pressure, Biegefestigkeit, flexural strength, environmental barrier coatings, Umweltbarrierebeschichtungen, Plasmaspritzen, plasma spraying
URL zu externer Homepage https://www.cme-keramik.uni-bayreuth.de/de/index.html
Beschreibung

In face of an accelerating climate change, the reduction and substitution of fossil fuels is crucial to decarbonize energy production. Gas turbines can operate with versatile fuel sources like natural gas and future fuels such as hydrogen and ammonia. In a next future, thermal efficiencies above 65% are expected to be achieved by implementing non-oxide silicon-based (i.e. Si₃N₄, SiC and SiC/SiC) ceramic components. However, water vapor is one of the main combustion products, which leads to rapid corrosion due to the volatilization of the protective SiO₂ layer above 1200 °C. Hence, an in situ generated Yb₂Si₂O₇ double layered environmental barrier coating system composed of silazanes and the active fillers Yb2O3 and Si was processed at 1415 °C for 5 h in air to protect Si3N4, SiC and SiC/SiC from corrosion. The easy to apply coating system exhibits a dense microstructure with a thickness of up to 150 µm, besides an excellent adhesion strength (36.9 ± 6.2 MPa), hardness (6.9 ± 1.6 GPa) and scratch resistance (28 N). It remarkably overcomes over 15 thermal cycles between 1200 and 20 °C and shows almost no mass loss after harsh hot gas corrosion at 1200 °C for 200 h (pH2O = 0.15 atm, v = 100 m s⁻¹).