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Title: 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 TIC; ERA-06-005179; EDB-81-005696
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, C.E. Jr., Kovach, L., and Taylor, A.J. Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments. United States: N. p., 1980. Web.
Holcombe, C.E. Jr., Kovach, L., & Taylor, A.J. Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments. United States.
Holcombe, C.E. Jr., 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, C.E. Jr. 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}
}