Accession Number:

ADA209425

Title:

New Structural Materials

Descriptive Note:

Final rept.

Corporate Author:

GENERAL SCIENCES INC PLYMOUTH MEETING PA

Personal Author(s):

Report Date:

1989-03-25

Pagination or Media Count:

23.0

Abstract:

New high temperature structures need to be developed that are based on intermetallic materials and ceramic composites. High density borides and carbides previously have been synthesized by self-propagating high temperature synthesis using reaction pressing techniques in the absence of external heating. Based on this technique, new materials dense reinforced structures were synthesized using titanium boride as a primary matrix, with second phase brittle components such as carbon particles, carbon cloths, silicon and silicon carbide filaments, as well as ductile second phase additions, such as several forms of nickel or chromium. The effects of the additions on the mechanical and physical properties of those materials were examined as a function of temperature and composition. The interaction of matrixreinforcement during the exothermic formation was studied. A new filler material also was used with high temperature resin to demonstrate composites with higher temperature capabilities and low observable properties. The resulting materials were expected to have improved toughness, oxidation resistance, and high temperature survivability.

Subject Categories:

  • Laminates and Composite Materials
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE