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Title: Method of freeform fabrication by selective gelation of powder suspensions

The present invention is a novel method for freeform fabrication. Specifically, the method of solid freeform fabrication has the steps of: (a) preparing a slurry by mixing powder particles with a suspension medium and a gelling polysaccharide; (b) making a layer by depositing an amount of said powder slurry in a confined region; (c) hardening a selected portion of the layer by applying a gelling agent to the selected portion; and (d) repeating steps (b) and (c) to make successive layers and forming a layered object. In many applications, it is desirable to remove unhardened material followed by heating to remove gellable polysaccharide then sintering.
 [1];  [1]
  1. (Kennewick, WA)
Issue Date:
OSTI Identifier:
Battelle Memorial Institute (Richland, WA) PNNL
Patent Number(s):
US 5697043
Contract Number:
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA
Country of Publication:
United States
method; freeform; fabrication; selective; gelation; powder; suspensions; novel; specifically; solid; steps; preparing; slurry; mixing; particles; suspension; medium; gelling; polysaccharide; layer; depositing; amount; confined; region; hardening; selected; portion; applying; agent; repeating; successive; layers; forming; layered; applications; desirable; remove; unhardened; material; followed; heating; gellable; sintering; powder particles; novel method; successive layers; selected portion; successive layer; hardened material; freeform fabrication; repeating step; mixing powder; /264/419/