1960-01-01

REFRACTORY NONMETALS for use in hypersonic aircraft 600058

THIS PAPER describes screening tests by Bell Aircraft on ceramic and graphite materials for hot-spot areas. Results show that the best oxidation resistance at 2800 F was exhibited by a refractory body consisting of 90% silicon carbide and 10% boron carbide. Graphite coated with silicon carbide shows promise for applications at temperatures of at least 2800 F, and possibly 3700 F, for short periods.
The purpose of the tests was to determine the merits of:
  1. 1.
    Ceramic and graphite materials for hot-spot areas.
  2. 2.
    Refractory inorganic materials as thermal insulants.
The refractories were being considered for the wing leading edges and the nose of a proposed hypersonic aircraft. The insulants were for application between the outer skins and the interior structure.*

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