About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Applications
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Presentation Title |
Additive Manufacturing of Si-SiC Cermets for Combustion Device Applications |
Author(s) |
Patryk Pawel Radyjowski, David L Bourell, Desiderio Kovar, Janet L Ellzey |
On-Site Speaker (Planned) |
Patryk Pawel Radyjowski |
Abstract Scope |
Traditional manufacturing methods for high-temperature devices are time intensive and limited to simple shapes. Additive manufacturing (AM) reduces lead times and opens the design space to more complex geometries. Indirect laser sintering of siliconized silicon carbide (Si-SiC) cermet was evaluated for creating devices compatible with combustion environments. Heat recirculating combustors especially benefit from geometric flexibility. Si-SiC process improvements are presented for the prodution of ceramic combustors. The effect of flame on the material was studied by direct exposure of samples to hot combustion products at 1000°C and 1260°C for 10 hours. Subsequently, three experimental Si-SiC combustors were manufactured and fired to evaluate the practical aspects of cermet applications. Each device was operated for 70 hours under excess-air, methane flames with solid temperatures up to 1405°C. The surface oxidation and phase changes were assessed. Operating temperatures between 1200°C and 1350°C reduce damage to the material and provide promise of long-term, high-temperature operation. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |