STUDY OF THE MECHANISM OF FAILURE OF ROCKET MATERIALS AND MATERIALS RESEARCH

Abstract

Rocket failure mechanisms in conjunction with the development of nozzle materials for solid propellant motors is discussed. Testing graphite in an oxy-acetylene torch and the effects of purity, density, orientation, and microstructure on erosion-resistance were evaluated. Erosion decreased with greater purity. New graphite materials were developed and evaluated including hot pressed compositions and impregnated bodies. Suitability of ZrC as a nozzle material was evaluated. Incorporation of Ta and W fibers in ZrC results in considerable improvement in resistance to thermal spalling although not sufficient to prevent cracking. Thoria-base bodies reinforced with W fibers were studied. Ten promising materials were fabricated into rocket nozzles and tested in static motor stands. Erosion performance is presented along with analysis of failure mechanisms.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1962
Accession Number
AD0281794

Entities

People

  • D. C. Schell
  • W. K. Sumida
  • Y. Baskin

Organizations

  • IIT Research Institute

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Ceramic Materials
  • Chemistry
  • Dynamic Tests
  • Erosion Resistance
  • Fabrication
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Modulus Of Elasticity
  • Refractory Metals
  • Solid Propellants
  • Surface Temperature

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Rocket Propulsion.