Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1980-08-22
1982-01-05
McCarthy, Helen M.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
501 96, 501151, 501152, 501154, 331 945G, 428688, 264 85, 264 62, 264332, C04B 3550, C04B 3558
Patent
active
043094678
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.
REFERENCES:
patent: 4261753 (1981-04-01), Holcombe et al.
Holcombe Cressie E.
Kovach Louis
Besha Richard G.
Hamel Stephen D.
Larcher Earl L.
McCarthy Helen M.
The United States of America as represented by Department of Ene
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