Fabrication of TBC-armored rocket combustion chambers by EB-PVD methods and TLP assembling
| Autor: | Dirk Greuel, Manfred Peters, Uwe Schulz, Klaus Fritscher, Oskar J. Haidn |
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| Rok vydání: | 2005 |
| Předmět: |
business.product_category
Materials science Fabrication 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Thermal barrier coating Coating EB-PVD method General Materials Science Ceramic Composite material Yttria-stabilized zirconia Metallurgy 021001 nanoscience & nanotechnology 0104 chemical sciences Rocket rocket combustion chamber visual_art Physical vapor deposition engineering visual_art.visual_art_medium Combustion chamber 0210 nano-technology business |
| Popis: | A thermal barrier coating (TBC) system for rocket chambers made of Cu-based high strength alloys has been developed in a pilot project in line with EB-PVD (electron-beam physical vapor deposition) technology aiming at TBC application on Cu-based walls of real rocket combustion chambers. The TBC system consists of a metallic bond coating compatible with Cu-based material and an yttria partially stabilized zirconia TBC. The TBC overlayer is a distinctive ceramic structure designed for an exceptionally low Young's modulus to withstand the extreme mismatch stresses between the internally LN-cooled high thermal expansion Cu metal base and the low thermal expansion hot ceramic shell. The TBC system has been qualified under close-to-service conditions on cylindrical LH2-cooled combustion chamber segments, where they have performed superior.As EB-PVD technology is a line-of-sight process that is rather able to coat internal cavities, a transient liquid phase (TLP) joining technique for fully coated parts has been developed, that allows to assemble complete components out of vapor-accessible fully coated parts. It is capable, e.g. to incorporate sinuous cooling passages in the throat areas of combustion chambers, and/or to assemble oversized parts out of smaller components by maintaining parent metal properties. A manufacturing process is outlined for making internal TBC armored combustion chambers. |
| Databáze: | OpenAIRE |
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