High density crystalline boron prepared by hot isostatic pressing in refractory metal containers

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:868904

Hoenig, Clarence L ^[1]

---

1. Livermore, CA

Boron powder is hot isostatically pressed in a refractory metal container to produce a solid boron monolith with a bulk density at least 2.22 g/cc and up to or greater than 2.34 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 or chemical vapor deposited onto a powder compact. Hot isostatic pressing at 1800.degree. C. and 30 KSI (206.8 MPa) argon pressure for four hours produces a bulk density of 2.34 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: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5240691
• OSTI ID: 868904
• Country of Publication: United States
• Language: English

Related Subjects

density
crystalline
boron
prepared
hot
isostatic
pressing
refractory
metal
containers
powder
isostatically
pressed
container
produce
solid
monolith
bulk
22
cc
34
formed
tantalum
niobium
tungsten
molybdenum
alloys
form
canister
alternatively
plasma
sprayed
chemical
vapor
deposited
compact
1800
degree
30
ksi
206
mpa
argon
pressure
hours
produces
complex
shapes
powder compact
hot isostatically
bulk density
plasma spray
vapor deposited
refractory metal
chemical vapor
hot isostatic
isostatic pressing
isostatically pressed
boron powder
plasma sprayed
metal container
argon pressure
metal containers
alternatively plasma
crystalline boron
density crystalline
complex shapes
solid boron
hours produces
complex shape
/423/264/419/