High density-high purity graphite prepared by hot isostatic pressing in refractory metal containers

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869437

Hoenig, Clarence L ^[1]

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1. Livermore, CA

Porous graphite in solid form is hot isostatically pressed in a refractory metal container to produce a solid graphite monolith with a bulk density greater than or equal to 2.10 g/cc. The refractory metal container is formed of tantalum, niobium, tungsten, molybdenum or alloys thereof in the form of a canister or alternatively plasma sprayed, chemically vapor deposited, or coated by some other suitable means onto graphite. Hot isostatic pressing at 2200.degree. C. and 30 KSI (206.8 MPa) argon pressure for two hours produces a bulk density of 2.10 g/cc. Complex shapes can be made.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5336520
• OSTI ID: 869437
• Country of Publication: United States
• Language: English

Related Subjects

density-high
purity
graphite
prepared
hot
isostatic
pressing
refractory
metal
containers
porous
solid
form
isostatically
pressed
container
produce
monolith
bulk
density
equal
10
cc
formed
tantalum
niobium
tungsten
molybdenum
alloys
canister
alternatively
plasma
sprayed
chemically
vapor
deposited
coated
suitable
means
2200
degree
30
ksi
206
mpa
argon
pressure
hours
produces
complex
shapes
suitable means
hot isostatically
solid form
bulk density
plasma spray
vapor deposited
refractory metal
hot isostatic
isostatic pressing
isostatically pressed
plasma sprayed
metal container
solid graphite
argon pressure
porous graphite
metal containers
alternatively plasma
complex shapes
chemically vapor
hours produces
complex shape
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