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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 use 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/sup 0/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:
;
Issue Date:
OSTI Identifier:
6627552
Assignee:
Dept. of Energy TIC; ERA-06-019007; EDB-81-057752
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LANTHANUM BORIDES; HOT PRESSING; LASER MATERIALS; MOLYBDENUM SILICIDES; FLUORINE; MOLYBDENUM BORIDES; BORIDES; BORON COMPOUNDS; ELEMENTS; FABRICATION; HALOGENS; LANTHANUM COMPOUNDS; MATERIALS; MATERIALS WORKING; MOLYBDENUM COMPOUNDS; NONMETALS; PRESSING; RARE EARTH COMPOUNDS; SILICIDES; SILICON COMPOUNDS; TRANSITION ELEMENT COMPOUNDS 360601* -- Other Materials-- Preparation & Manufacture

Citation Formats

Kovach, L., and Holcombe, C.E. Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition. United States: N. p., 1980. Web.
Kovach, L., & Holcombe, C.E. Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition. United States.
Kovach, L., and Holcombe, C.E. Fri . "Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition". United States.
@article{osti_6627552,
title = {Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition},
author = {Kovach, L. and Holcombe, C.E.},
abstractNote = {The present invention relates to a composition particularly suitable for use 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/sup 0/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 = {1980},
month = {8}
}