RESEARCH ON PHYSICAL AND CHEMICAL PRINCIPLES AFFECTING HIGH TEMPERATURE MATERIALS FOR ROCKET NOZZZLES.
Abstract
Data were obtained on the corrosion of W by CO2/Ar mixtures with CO2 stagnation partial pressures of 40, 81, 122, 192, and 340 torr at 2325-3000 K and 340-torr total stagnation pressure. The reaction rate is linear with time. At the lower temperatures log rate is nearly linear with reciprocal temperature for all CO2 partial pressures, and near 3000 K the rates approach those calculated for diffusion control. These data on the CO2-W reaction have been analyzed in terms of an approximate forward rate expression for the surface controlled region, a mass-transfer treatment, and an assumed reverse reaction. The calculated curves agree well with the experimental data, although some questions remain to be resolved; measurements have been made of the corrosion rates of tungsten in mixtures of CO2, CO, and Ar to help clarify these points. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1964
- Accession Number
- AD0448483
Entities
People
- Robert Lowrie