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Gelcasting compositions having improved drying characteristics and machinability

Patent ·
OSTI ID:873708
 [1];  [2]
  1. Knoxville, TN
  2. Oak Ridge, TN
+ Show Author Affiliations

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.

Research Organization:
LOCKHEED MARTIN ENERGY RES COR
DOE Contract Number:
AC05-96OR22464
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
US 6228299
OSTI ID:
873708
Country of Publication:
United States
Language:
English

References (10)

Gelcast Reaction Bonded Silicon Nitride Composites
  • 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 https://doi.org/10.1002/9780470313831.ch26
book January 1991
Gelcasting of silicon compositions for SRBSN report December 1995
Rheology of Zirconia-Alumina Gelcasting Slurries journal January 1992
Tensile Strength of Dried Gelcast Green Bodies
  • 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
book January 2008
Tailoring Suspension Flow for the Gelcasting of Oxide and Nonoxide Ceramics journal January 1994
Gelcasting of Alumina journal March 1991
Gelcasting: From laboratory development toward industrial production journal January 1997
Rheology and Microstructure of Concentrated Zirconia-Alumina Suspensions for Gelcasting Composites journal January 1992
Green Machining of Gelcast Ceramic Materlals
  • 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
book January 2008
Gelcasting of Sintered Reaction Bonded Silicon Nitride for Improved Mechanical Properties
  • 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
book January 1995

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Related Subjects

/264/419/524/
ability
added
aides
behavior
casting composition
characteristics
chipping
composition
compositions
conditions
control
cracking
disclosed
dispersants
dried
dry
drying
gelcast
gelcasting
humidity
imparts
improved
improved drying
initiator
inorganic
inorganic powder
life
machinability
machine
method
monomer
organic powder
plasticizer
polymerizing
powder
processing
properties
relative
relative humidity
samples
section
shelf
shelf life
slurry
soluble
solvent
store
thick
unfired
varying