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

Abstract

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.

Inventors:
 [1];  [1]
  1. Kennewick, WA
Issue Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
871272
Patent Number(s):
5697043
Assignee:
Battelle Memorial Institute (Richland, WA)
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Baskaran, Suresh, and Graff, Gordon L. Method of freeform fabrication by selective gelation of powder suspensions. United States: N. p., 1997. Web.
Baskaran, Suresh, & Graff, Gordon L. Method of freeform fabrication by selective gelation of powder suspensions. United States.
Baskaran, Suresh, and Graff, Gordon L. Wed . "Method of freeform fabrication by selective gelation of powder suspensions". United States. https://www.osti.gov/servlets/purl/871272.
@article{osti_871272,
title = {Method of freeform fabrication by selective gelation of powder suspensions},
author = {Baskaran, Suresh and Graff, Gordon L},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}

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