An Al2O3-SiO2 ceramic MEMS-based micropropulsion system was designed and fabricated using new fabrication route. The micropropulsion system consists of five major components: propellant reservoir, injector, electrodes, combustion chamber, and micronozzle; all integrated into a single volume of 20 mm × 20 mm × 5 mm. 85-15 wt% of HAN-water mixture was self-prepared and used as propellant along with electrolytic mechanism for ignition. Performance of the system was predicted numerically. The system was fabricated by microcasting the well-dispersed suspension of submicron Al2O3 powder and PSZ preceramic resin into a lithography-prepared PDMS soft mold and sintering at 1200°C to form the ceramic composite. Shrinkage of about 20% was noticed after sintering. TGA analysis reveals good thermal stability of the composite as weight loss at temperature of 1000°C is as small as 1.3wt%. SEM-EDX analysis verifies the formation of Al2O3-SiO2 composite as only elements of Al, O, and Si exist with a negligible amount of residual carbon. Current fabrication route hold the promise to fabricate MEMS micropropulsion system using different ceramic composite materials to meet different design requirements.
|Title of host publication||47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011|
|Publication status||Published - 1 Dec 2011|
|Event||47th American Institute of Aeronautics and Astronautics, American Society of Mechanical Engineers, Society of Automotive Engineers & American Society for Engineering Education Joint Propulsion Conference and Exhibit - San Diego, United States|
Duration: 31 Jul 2011 → 3 Aug 2011
Conference number: 47
|Conference||47th American Institute of Aeronautics and Astronautics, American Society of Mechanical Engineers, Society of Automotive Engineers & American Society for Engineering Education Joint Propulsion Conference and Exhibit|
|Period||31/07/11 → 3/08/11|