Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments
Patent
·
OSTI ID:863855
- Knoxville, TN
- Oak Ridge, TN
- Ten Mile, TN
The present invention relates to a structural composition useful in corrosive hydrogen-fluorine environments at temperatures in excess of 1400.degree. K. The composition is formed of a isostatically pressed and sintered or a hot-pressed mixture of lanthanum hexaboride particles and about 10-30 vol. % carbon. The lanthanum-hexaboride reacts with the high-temperature fluorine-containing bases to form an adherent layer of corrosion-inhibiting lanthanum trifluoride on exposed surfaces of the composition. The carbon in the composite significantly strengthens the composite, enhances thermal shock resistance, and significantly facilitates the machining of the composition.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4261753
- OSTI ID:
- 863855
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
lanthanum-hexaboride
carbon
composition
corrosive
hydrogen-fluorine
environments
relates
structural
useful
temperatures
excess
1400
degree
formed
isostatically
pressed
sintered
hot-pressed
mixture
lanthanum
hexaboride
particles
10-30
vol
reacts
high-temperature
fluorine-containing
bases
form
adherent
layer
corrosion-inhibiting
trifluoride
exposed
surfaces
composite
significantly
strengthens
enhances
thermal
shock
resistance
facilitates
machining
shock resistance
thermal shock
exposed surface
composition useful
lanthanum hexaboride
isostatically pressed
exposed surfaces
containing base
hydrogen-fluorine environments
carbon composition
corrosive hydrogen-fluorine
/501/
carbon
composition
corrosive
hydrogen-fluorine
environments
relates
structural
useful
temperatures
excess
1400
degree
formed
isostatically
pressed
sintered
hot-pressed
mixture
lanthanum
hexaboride
particles
10-30
vol
reacts
high-temperature
fluorine-containing
bases
form
adherent
layer
corrosion-inhibiting
trifluoride
exposed
surfaces
composite
significantly
strengthens
enhances
thermal
shock
resistance
facilitates
machining
shock resistance
thermal shock
exposed surface
composition useful
lanthanum hexaboride
isostatically pressed
exposed surfaces
containing base
hydrogen-fluorine environments
carbon composition
corrosive hydrogen-fluorine
/501/