Accession Number:

AD0261461

Title:

DEVELOPMENT OF ULTRA REFRACTORY MATERIALS

Descriptive Note:

Progress rept. no. 25, 1 May-31 Jul 1961

Corporate Author:

CARBORUNDUM CO NIAGARA FALLS NY

Personal Author(s):

Report Date:

1961-08-16

Pagination or Media Count:

23.0

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.

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE