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Internally Cooled Monolithic Silicon Nitride Aerospace ComponentsA set of rapid prototyping (RP) processes have been combined with gelcasting to make ceramic aerospace components that contain internal cooling geometry. A mold and core combination is made using a MM6Pro (Sanders Prototyping, Inc.) and SLA-250/40 (3Dsystems, Inc.). The MM6Pro produces cores from ProtoBuild (trademarked) wax that are dissolved in room temperature ethanol following gelcasting. The SLA-250/40 yields epoxy/acrylate reusable molds. Parts produced by this method include two types of specimens containing a high density of thin long cooling channels, thin-walled cylinders and plates, as well as a model hollow airfoil shape that can be used for burner rig evaluation of coatings. Both uncoated and mullite-coated hollow airfoils has been tested in a Mach 0.3 burner rig with cooling air demonstrating internal cooling and confirming the effectiveness of mullite coatings.
Document ID
20010061357
Document Type
Preprint (Draft being sent to journal)
Authors
Best, Jonathan E. (Case Western Reserve Univ. Cleveland, OH United States)
Cawley, James D. (Case Western Reserve Univ. Cleveland, OH United States)
Bhatt, Ramakrishna T. (Army Research Lab. United States)
Fox, Dennis S. (NASA Glenn Research Center Cleveland, OH United States)
Lang, Jerry
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Aircraft Design, Testing and Performance
Meeting Information
Ceramic Materials and Components for Engineers 7th International Symposium(Goslar)
Funding Number(s)
CONTRACT_GRANT: NAS3-404
CONTRACT_GRANT: NCC3-714
PROJECT: RTOP 523-31-13
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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