Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments

Patent · Tue Jan 22 00:00:00 EST 1980

OSTI ID:7062084

Holcombe, Jr, C E; Kovach, L; Taylor, A J

The present invention relates to a structural composition useful in corrosive hydrogen-fluorine environments at temperatures in excess of 1400/sup 0/K. The composition is formed of a isostatically pressed and sintered or a hot-pressed mixture of lanthanum hexaboride particles and about 10 to 30 vol% carbon. The lanthanum-hexaboride reacts with the high-temperature fluorine-containing gases 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.

• DOE Contract Number: W-7405-ENG-26
• Assignee: Dept. of Energy
• OSTI ID: 7062084
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
GAS LASERS
CORROSION INHIBITORS
MATERIALS
CARBON
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COMBUSTION CHAMBERS
CONTROLLED ATMOSPHERES
CORROSIVE EFFECTS
DESIGN
FABRICATION
HYDROFLUORIC ACID
LANTHANUM BORIDES
LANTHANUM FLUORIDES
MIXTURES
NOZZLES
THERMAL SHOCK
ATMOSPHERES
BORIDES
BORON COMPOUNDS
DISPERSIONS
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LANTHANUM COMPOUNDS
LASERS
NONMETALS
RARE EARTH COMPOUNDS
420300* - Engineering- Lasers- (-1989)