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Title: Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition

Abstract

The present invention relates to a composition particularly suitable for as structural components subject to high-temperature environments containing gaseous hydrogen and fluorine. The composition of the present invention consists essentially of lanthanum hexaboride-molybdenum diboride with dispersed silicon. The composition is formed by hot pressing a powder mixture of lanthanum hexaboride as the major constituent and molybdenum disilicide. This composition exhibits substantial resistance to thermal shock and corrosion in environments containing hydrogen and fluorine gases at material surface temperatures up to about 1850.degree. K. Upon exposure of the hot-pressed composition to high-temperature environments containing fluorine gases, a highly protective layer of lanthanum trifluoride containing dispersed molybdenum is formed on exposed surfaces of the composition.

Inventors:
 [1];  [2]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
864098
Patent Number(s):
4309467
Assignee:
United States of America as represented by Department of Energy (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
composition; high-temperature; hydrogen-fluorine; environments; method; relates; particularly; suitable; structural; components; subject; containing; gaseous; hydrogen; fluorine; consists; essentially; lanthanum; hexaboride-molybdenum; diboride; dispersed; silicon; formed; hot; pressing; powder; mixture; hexaboride; major; constituent; molybdenum; disilicide; exhibits; substantial; resistance; thermal; shock; corrosion; gases; material; surface; temperatures; 1850; degree; exposure; hot-pressed; highly; protective; layer; trifluoride; exposed; surfaces; structural components; containing hydrogen; gaseous hydrogen; protective layer; thermal shock; exposed surface; particularly suitable; hot pressing; containing gas; material surface; consists essentially; molybdenum disilicide; temperature environments; lanthanum hexaboride; surface temperature; powder mixture; exposed surfaces; surface temperatures; temperature environment; environments containing; hot press; fluorine gas; hydrogen-fluorine environments; high-temperature environment; structural component; major constituent; containing gaseous; /428/264/501/

Citation Formats

Kovach, Louis, and Holcombe, Cressie E. Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition. United States: N. p., 1982. Web.
Kovach, Louis, & Holcombe, Cressie E. Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition. United States.
Kovach, Louis, and Holcombe, Cressie E. Fri . "Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition". United States. https://www.osti.gov/servlets/purl/864098.
@article{osti_864098,
title = {Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition},
author = {Kovach, Louis and Holcombe, Cressie E.},
abstractNote = {The present invention relates to a composition particularly suitable for as structural components subject to high-temperature environments containing gaseous hydrogen and fluorine. The composition of the present invention consists essentially of lanthanum hexaboride-molybdenum diboride with dispersed silicon. The composition is formed by hot pressing a powder mixture of lanthanum hexaboride as the major constituent and molybdenum disilicide. This composition exhibits substantial resistance to thermal shock and corrosion in environments containing hydrogen and fluorine gases at material surface temperatures up to about 1850.degree. K. Upon exposure of the hot-pressed composition to high-temperature environments containing fluorine gases, a highly protective layer of lanthanum trifluoride containing dispersed molybdenum is formed on exposed surfaces of the composition.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

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