Ceramic feedstock composition for the manufacture of prototype elements
First Claim
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1. A method of manufacture of a prototype element comprising the steps of:
- a) formulating a feedstock composition comprising;
i) a powder taken from the group consisting of silicon nitride, aluminum oxide, yttrium oxide and mixtures thereof, said powder comprising at least 50% by volume of the composition;
ii) an ethylene acrylate copolymer binder;
iii) wax;
iv) liquid plasticizer compatible with the binder taken from the group consisting of fatty acid esters, mineral oil and mixtures thereofb) extruding a ribbon or filament of said feedstock into a prototype element shape, andc) debinding the prototype element shape to excise the organic materials.
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Abstract
A ceramic or metal feedstock composition useful for manufacture of prototype elements using a filament or ribbon deposition apparatus, includes a ceramic or metal powder, a binder of ethylene/acrylate copolymer or homopolymer, a wax and liquid plasticizer mixed together in the form of a ribbon or rod which may then be used in a prototyping device.
13 Citations
2 Claims
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1. A method of manufacture of a prototype element comprising the steps of:
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a) formulating a feedstock composition comprising; i) a powder taken from the group consisting of silicon nitride, aluminum oxide, yttrium oxide and mixtures thereof, said powder comprising at least 50% by volume of the composition; ii) an ethylene acrylate copolymer binder; iii) wax; iv) liquid plasticizer compatible with the binder taken from the group consisting of fatty acid esters, mineral oil and mixtures thereof b) extruding a ribbon or filament of said feedstock into a prototype element shape, and c) debinding the prototype element shape to excise the organic materials. - View Dependent Claims (2)
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Specification
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Current AssigneeAdvanced Ceramics Research LLC
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Original AssigneeAdvanced Ceramics Research, Inc. (Rtx Corporation)
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InventorsHilmas, Gregory E., Lombardi, John L., Popovich, Dragan
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Primary Examiner(s)Michl, Paul R.
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Application NumberUS08/887,710Time in Patent Office782 DaysField of Search524/318, 524/413, 524/430, 524/443US Class Current524/318CPC Class CodesC08K 3/22 of metalsC08K 3/34 Silicon-containing compoundsC08K 5/0016 PlasticisersC08L 23/08 Copolymers of ethene C08L23...
