PDF Publication Title:
Text from PDF Page: 133
PROCEEDINGS OF ASME TURBO EXPO 2004 ASME TURBO EXPO 2004: POWER FOR LAND, SEA, AND AIR JUNE, 2004; VIENNA, AUSTRIA GT2004-54092 Development and Evaluation of Environmental Barrier Coatings for Si-based Ceramics Tania Bhatia, Venkat Vedula, Harry Eaton, Ellen Sun, John Holowczak and Gary Linsey United Technologies Research Center East Hartford, CT, USA. ABSTRACT Environmental barrier coatings (EBCs) are being developed for silicon carbide (SiC) based composites and monolithic silicon nitride (Si3N4) to protect against the accelerated oxidation and subsequent silica volatilization in high temperature, high-pressure steam environments encountered in gas turbine engines. While EBCs for silicon carbide (EBCSiC) have been demonstrated in combustor liner applications, efforts are ongoing in the development of EBC systems for silicon nitride (EBCSiN). The challenges of adapting EBCSiC to monolithic Si3N4 are discussed in this paper. Progress in the area of EBCSiN including development and performance during field tests and tests simulating engine conditions are reviewed. INTRODUCTION Silicon-based monolithic ceramics (Silicon Carbide and Silicon Nitride) and ceramic-matrix composites (CMCs) are attractive materials for use in gas turbine engine hot sections due to their high temperature mechanical and physical properties as well as lower density than metals. Potential gas turbine ceramic components include combustor liners, vanes, rotors and shrouds. One of the key material requirements for these components is that they withstand high temperatures and pressures for extremely long duration under steam-rich environments. Steam- stability has been shown to be a problem in SiO2 forming ceramics (SiC and Si3N4) [1-5] due to the accelerated oxidation and recession of silicon carbide and silicon nitride owing to the formation of volatile Si(OH)4 species in high temperature exposure to steam. Environmental Barrier Coatings (EBCs) have been developed for SiC/SiC CMCs and are key to realizing the potential of Si-based materials for high temperature gas turbine applications [6]. EBCs developed for SiC CMCs have been successfully deployed for protection of CMC combustor liners in Solar Centaur 50S engines and have accumulated over 50,000 hours of engine tests at temperatures in the 1150°C- 1200°C (2100-2200F) range [6-9]. Results on the environmental protectiveness of EBCSiC when applied to Si3N4 have been discussed by Sun et. al [10] and More et. al [11]. This paper discusses some important challenges that affect the direct application of the EBCSiC to Si3N4 based both on experimental results and finite element analysis on coated components. 132 Copyright © 2004 by ASMEPDF Image | ADVANCED MICROTURBINE SYSTEMS Final Report for Tasks 1 Through 4 and Task 6
PDF Search Title:
ADVANCED MICROTURBINE SYSTEMS Final Report for Tasks 1 Through 4 and Task 6Original File Name Searched:
AdvancedMicroturbineSystems_924484.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |