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Title: Gelcasting compositions having improved drying characteristics and machinability

Abstract

A gelcasting composition has improved drying behavior, machinability and shelf life in the dried and unfired state. The composition includes an inorganic powder, solvent, monomer system soluble in the solvent, an initiator system for polymerizing the monomer system, and a plasticizer soluble in the solvent. Dispersants and other processing aides to control slurry properties can be added. The plasticizer imparts an ability to dry thick section parts, to store samples in the dried state without cracking under conditions of varying relative humidity, and to machine dry gelcast parts without cracking or chipping. A method of making gelcast parts is also disclosed.

Inventors:
 [1];  [2]
+ Show Inventor Affiliations
  1. Knoxville, TN
  2. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
873708
Patent Number(s):
6228299
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
gelcasting; compositions; improved; drying; characteristics; machinability; composition; behavior; shelf; life; dried; unfired; inorganic; powder; solvent; monomer; soluble; initiator; polymerizing; plasticizer; dispersants; processing; aides; control; slurry; properties; added; imparts; ability; dry; thick; section; store; samples; cracking; conditions; varying; relative; humidity; machine; gelcast; chipping; method; disclosed; relative humidity; shelf life; organic powder; inorganic powder; improved drying; casting composition; /264/419/524/

Citation Formats

Janney, Mark A, and Walls, Claudia A. H. Gelcasting compositions having improved drying characteristics and machinability. United States: N. p., 2001. Web.
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Janney, Mark A, & Walls, Claudia A. H. Gelcasting compositions having improved drying characteristics and machinability. United States.
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Janney, Mark A, and Walls, Claudia A. H. Mon . "Gelcasting compositions having improved drying characteristics and machinability". United States. https://www.osti.gov/servlets/purl/873708.
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@article{osti_873708,
title = {Gelcasting compositions having improved drying characteristics and machinability},
author = {Janney, Mark A and Walls, Claudia A. H.},
abstractNote = {A gelcasting composition has improved drying behavior, machinability and shelf life in the dried and unfired state. The composition includes an inorganic powder, solvent, monomer system soluble in the solvent, an initiator system for polymerizing the monomer system, and a plasticizer soluble in the solvent. Dispersants and other processing aides to control slurry properties can be added. The plasticizer imparts an ability to dry thick section parts, to store samples in the dried state without cracking under conditions of varying relative humidity, and to machine dry gelcast parts without cracking or chipping. A method of making gelcast parts is also disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}
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Works referenced in this record:

Gelcasting of Sintered Reaction Bonded Silicon Nitride for Improved Mechanical Properties
book, January 1995

  • Maria, J. -P.; Kiggans, J. O.; Tiegs, T. N.
  • Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures—B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5
  • https://doi.org/10.1002/9780470314784.ch51

Gelcast Reaction Bonded Silicon Nitride Composites
book, January 1991

  • Omatete, O. O.; Tiegs, T. N.; Young, A. C.
  • Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8
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Gelcasting of silicon compositions for SRBSN
report, December 1995

Tailoring Suspension Flow for the Gelcasting of Oxide and Nonoxide Ceramics
journal, January 1994

Tensile Strength of Dried Gelcast Green Bodies
book, January 2008

  • Nunn, Stephen D.; Omatete, Ogbemi O.; Walls, Claudia A.
  • Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials—A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4
  • https://doi.org/10.1002/9780470314500.ch55

Green Machining of Gelcast Ceramic Materlals
book, January 2008

  • Nunn, Stephen D.; Kirby, Glen H.
  • Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures—A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3
  • https://doi.org/10.1002/9780470314821.ch24

Rheology of Zirconia-Alumina Gelcasting Slurries
journal, January 1992

Gelcasting: From laboratory development toward industrial production
journal, January 1997

Gelcasting of Alumina
journal, March 1991

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