DEVELOPMENT OF ULTRA REFRACTORY MATERIALS
Progress rept. no. 25, 1 May-31 Jul 1961
CARBORUNDUM CO NIAGARA FALLS NY
Pagination or Media Count:
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.
- Ceramics, Refractories and Glass