Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments
Abstract
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.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7062084
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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)
Citation Formats
Holcombe, Jr, C E, Kovach, L, and Taylor, A J. Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments. United States: N. p., 1980.
Web.
Holcombe, Jr, C E, Kovach, L, & Taylor, A J. Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments. United States.
Holcombe, Jr, C E, Kovach, L, and Taylor, A J. Tue .
"Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments". United States.
@article{osti_7062084,
title = {Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments},
author = {Holcombe, Jr, C E and Kovach, L and Taylor, A J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}
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