Progress on development of Al2O3-SiO2 Ceramic MEMS-based monopropellant micropropulsion systemm

Kean How Cheah, Kai Seng Koh, Choon Lai Chiang, Jit Kai Chin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011
DOIs
Publication statusPublished - 1 Dec 2011
Externally publishedYes
Event47th 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 20113 Aug 2011
Conference number: 47

Conference

Conference47th 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
CountryUnited States
CitySan Diego
Period31/07/113/08/11

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