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Title: Method of making a functionally graded material

Abstract

A gelcasting method of making an internally graded article alternatively includes the steps of: preparing a slurry including a least two different phases suspended in a gelcasting solution, the phases characterized by having different settling characteristics; casting the slurry into a mold having a selected shape; allowing the slurry to stand for a sufficient period of time to permit desired gravitational fractionation in order to achieve a vertical compositional gradient in the molded slurry; gelling the slurry to form a solid gel while preserving the vertical compositional gradient in the molded slurry; drying the gel to form a dried green body; and sintering the dry green body to form a solid object, at least one property thereof varying along the vertical direction because of the compositional gradient in the molded slurry.

Inventors:
 [1];  [2];  [1];  [3]
  1. Oak Ridge, TN
  2. Clinton, TN
  3. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
874364
Patent Number(s):
6375877
Assignee:
UT Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B28 - WORKING CEMENT, CLAY, OR STONE B28B - SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; functionally; graded; material; gelcasting; internally; article; alternatively; steps; preparing; slurry; including; phases; suspended; solution; characterized; settling; characteristics; casting; mold; selected; shape; allowing; stand; sufficient; period; time; permit; gravitational; fractionation; achieve; vertical; compositional; gradient; molded; gelling; form; solid; preserving; drying; dried; green; sintering; dry; property; varying; direction; sufficient period; casting solution; slurry including; casting method; /264/

Citation Formats

Lauf, Robert J, Menchhofer, Paul A, Walls, Claudia A, and Moorhead, Arthur J. Method of making a functionally graded material. United States: N. p., 2002. Web.
Lauf, Robert J, Menchhofer, Paul A, Walls, Claudia A, & Moorhead, Arthur J. Method of making a functionally graded material. United States.
Lauf, Robert J, Menchhofer, Paul A, Walls, Claudia A, and Moorhead, Arthur J. Tue . "Method of making a functionally graded material". United States. https://www.osti.gov/servlets/purl/874364.
@article{osti_874364,
title = {Method of making a functionally graded material},
author = {Lauf, Robert J and Menchhofer, Paul A and Walls, Claudia A and Moorhead, Arthur J},
abstractNote = {A gelcasting method of making an internally graded article alternatively includes the steps of: preparing a slurry including a least two different phases suspended in a gelcasting solution, the phases characterized by having different settling characteristics; casting the slurry into a mold having a selected shape; allowing the slurry to stand for a sufficient period of time to permit desired gravitational fractionation in order to achieve a vertical compositional gradient in the molded slurry; gelling the slurry to form a solid gel while preserving the vertical compositional gradient in the molded slurry; drying the gel to form a dried green body; and sintering the dry green body to form a solid object, at least one property thereof varying along the vertical direction because of the compositional gradient in the molded slurry.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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