DEVELOPMENT OF ULTRA REFRACTORY MATERIALS

Abstract

The study of solid solutions of TaC and ZrC was continued. The melting temperatures and calculated spectral emissivities showed a reversible change to occur on heating the pure carbides. This change is accompanied by a marked decrease in emissivity and resistivity. The measured melting temperatures are lower than the reported values. The cause of the low melting temperatures, due possibly to non-stoichiometry or failure to correct completely for emissivity, has not been resolved. A survey was started to determine whether radome materials with improved thermal shock resistance can be developed. A few zero expansion and low expansion ceramic bodies were prepared for testing.

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Document Details

Document Type
Technical Report
Publication Date
Aug 16, 1961
Accession Number
AD0261461

Entities

People

  • Peter T. Shaffer

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Carbides
  • Electrical Properties
  • Emissivity
  • Government Procurement
  • Materials
  • Materials Engineering
  • Ordnance Laboratories
  • Physical Properties
  • Refractory Materials
  • Resistance
  • Shock
  • Shock Resistance
  • Solid Solutions
  • Surface Temperature
  • Tantalum Carbides
  • Thermal Expansion
  • Thermal Shock

Fields of Study

  • Materials science

Readers

  • Plasma Physics.
  • Surface Engineering/Surface Coating Technology.