Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866470

Halverson, Danny C ^[1]; Landingham, Richard L ^[2]

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1. Manteca, CA
2. 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 (United States)
• 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

Related Subjects

infiltration
processing
boron
carbide-
boron-
boride-reactive
metal
cermets
chemical
pretreatment
method
produce
composites
process
carbide
starting
constituents
powder
form
immersed
various
alcohols
agents
change
surface
chemistry
chemically
treated
consolidated
porous
ceramic
precursor
infiltrated
molten
aluminum
heating
wetting
conditions
treatment
allows
density
heat
tailorable
microstructure
cost
produces
improved
characteristics
including
increased
toughness
strength
metal composites
treatment method
improved characteristics
chemical agent
chemical agents
active metal
boron carbide
heat treated
reactive metal
porous ceramic
ceramic precursor
powder form
metal composite
molten aluminum
chemical treatment
metal cermet
metal cermets
infiltration process
surface chemistry
increased toughness
boride-reactive metal
boron carbide-
/75/419/