RESEARCH ON PHYSICAL AND CHEMICAL PRINCIPLES AFFECTING HIGH TEMPERATURE MATERIALS FOR ROCKET NOZZLES
Abstract
Reactions of several new materials (HfB2, HfC and solid solutions of TiC/ZrC and ZrC/Nb with possible rocket exhaust components) were studied. Only HfC is oxidizing atmospheres appeared to have attractive qualities. Preliminary kinetic studies were conducted with TiC and ZTA graphite in mixtures of CO2-CO-Ar. Corrosion of both materials depended linearly upon the CO2 partial pressure; the graphite corroded nearly linearly with time. New phases were observed in corroded carbide and boride samples. Vaporization studies were made to calculate the heat of formation of ZrB2; results thus far indicate a value near -45 kcal/mole. Thermal expansion data on ZrC, TiC and W are in good agreement with literature sources. Studies of the compatibility of TiB2 with W, Ta and Mo showed that Ta and W did not react significantly with TiB2 up to 2100 deg C but Mo did.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1962
- Accession Number
- AD0274186
Entities
People
- Robert Lowrie