Method of freeform fabrication by selective gelation of powder suspensions

Patent · Tue Dec 09 00:00:00 EST 1997

OSTI ID:563649

Baskaran, S; Graff, G L

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. 2 figs.

• Research Organization: Battelle Memorial Institute, Columbus, OH (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Inst., Richland, WA (United States)
• Patent Number(s): US 5,697,043/A/
• Application Number: PAN: 8-652,872
• OSTI ID: 563649
• Resource Relation: Other Information: PBD: 9 Dec 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
POWDERS
SOL-GEL PROCESS
POLYSACCHARIDES
SLURRIES
CURING
SHAPE
LAYERS
HEAT TREATMENTS