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
- Patent Number(s):
- None
- OSTI ID:
- 6627552
- Country of Publication:
- United States
- Language:
- English
Similar Records
Composition for use in high-temperature hydrogen-fluorine environments and method for making the composition
Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments
Related Subjects
360601* -- Other Materials-- Preparation & Manufacture
BORIDES
BORON COMPOUNDS
ELEMENTS
FABRICATION
FLUORINE
HALOGENS
HOT PRESSING
LANTHANUM BORIDES
LANTHANUM COMPOUNDS
LASER MATERIALS
MATERIALS
MATERIALS WORKING
MOLYBDENUM BORIDES
MOLYBDENUM COMPOUNDS
MOLYBDENUM SILICIDES
NONMETALS
PRESSING
RARE EARTH COMPOUNDS
SILICIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS