Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition
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.
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- Dept. of Energy
- OSTI ID:
- 6627552
- Country of Publication:
- United States
- Language:
- English
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Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition
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Related Subjects
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