Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets
Patent
·
OSTI ID:866470
- Manteca, CA
- Livermore, CA
A chemical pretreatment method is used to produce boron carbide-, boron-, and boride-reactive metal composites by an infiltration process. The boron carbide or other starting constituents, in powder form, are immersed in various alcohols, or other chemical agents, to change the surface chemistry of the starting constituents. The chemically treated starting constituents are consolidated into a porous ceramic precursor which is then infiltrated by molten aluminum or other metal by heating to wetting conditions. Chemical treatment of the starting constituents allows infiltration to full density. The infiltrated precursor is further heat treated to produce a tailorable microstructure. The process at low cost produces composites with improved characteristics, including increased toughness, strength.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Regents of University of California (Berkeley, CA)
- Patent Number(s):
- US 4718941
- OSTI ID:
- 866470
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/75/419/
active metal
agents
alcohols
allows
aluminum
boride-reactive
boride-reactive metal
boron
boron carbide
boron carbide-
boron-
carbide
carbide-
ceramic
ceramic precursor
cermets
change
characteristics
chemical
chemical agent
chemical agents
chemical treatment
chemically
chemistry
composites
conditions
consolidated
constituents
cost
density
form
heat
heat treated
heating
immersed
improved
improved characteristics
including
increased
increased toughness
infiltrated
infiltration
infiltration process
metal
metal cermet
metal cermets
metal composite
metal composites
method
microstructure
molten
molten aluminum
porous
porous ceramic
powder
powder form
precursor
pretreatment
process
processing
produce
produces
reactive metal
starting
strength
surface
surface chemistry
tailorable
toughness
treated
treatment
treatment method
various
wetting
active metal
agents
alcohols
allows
aluminum
boride-reactive
boride-reactive metal
boron
boron carbide
boron carbide-
boron-
carbide
carbide-
ceramic
ceramic precursor
cermets
change
characteristics
chemical
chemical agent
chemical agents
chemical treatment
chemically
chemistry
composites
conditions
consolidated
constituents
cost
density
form
heat
heat treated
heating
immersed
improved
improved characteristics
including
increased
increased toughness
infiltrated
infiltration
infiltration process
metal
metal cermet
metal cermets
metal composite
metal composites
method
microstructure
molten
molten aluminum
porous
porous ceramic
powder
powder form
precursor
pretreatment
process
processing
produce
produces
reactive metal
starting
strength
surface
surface chemistry
tailorable
toughness
treated
treatment
treatment method
various
wetting