FREEZE-FORM EXTRUSION FABRICATION OF FUNCTIONALLY GRAIDENT COMPOSITE PARTS
- Detailed Technology Description
- None
- Others
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- *Abstract
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This invention is about a freeze-form extrusion fabrication process for fabricating three-dimensional functionally gradient composite parts by extruding and mixing multiple aqueous pastes and then depositing and freezing the mixed paste layer by layer using a computer controlled multi-extruder machine. In this process various aqueous pastes with low organic binder contents are first prepared. The extrusion of each of the different pastes is coordinated through a computer controlled multi-extruder machine which mixes these pastes in any desired proportions. After mixing, these pastes are extruded through a nozzle and deposited according to a pre-programmed deposition path for each layer, and the mixed paste is frozen in a freezing chamber (with its temperature below 0oC) after deposition. A heating jacket is used to prevent the pastes inside this chamber from freezing before exiting the deposition nozzle. The layer-by-layer fabrication process continues until the entire part has been fabricated.
- *Principal Investigator
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Name: Ming Leu, Professor
Department:
Name: Greg Hilmas, Professor of Ceramic Engineer
Department:
Name: Catalin Roman
Department:
- Country/Region
- USA
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