Accession Number : AD0263118

Title :   TUNGSTEN AND ROCKET MOTORS

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : BLOOM,DAVID S.

Report Date : 06 SEP 1961

Pagination or Media Count : 1

Abstract : Spraying of alumina particles at low levels in the plasma-jet rocket exhaust simulator is reported. The alumina was introduced through the hollow rear electrode at relatively high flow rates using Ar as the carrier gas. No melting of the alumina was observed under these conditions, however, partial melting of the alumina particles was achieved at higher power levels with approximately the same alumina flow rates. The following modifications in the thermal shock apparatus were made to obtain an initial heating rate more nearly simulating that of a rocket nozzle in an actual firing: (1) graphite heater elements were used in the thermal shock apparatus; and (2) test specimens were dropped over the heater elements after they reached a high temperature. A recrystallized alumina ring was covered with a crack network after a 2-sec shock test in the apparatus.

Descriptors :   *PLASMA JETS, *ROCKET NOZZLES, *ROCKET ENGINES, *SOLID ROCKET PROPELLANTS, ABLATION, ALUMINUM COMPOUNDS, EROSION, EXHAUST GASES, FLAME SPRAYING, MATERIALS, MELTING, OXIDES, PARTICLES, REFRACTORY MATERIALS, SIMULATION, THERMAL STRESSES, TUNGSTEN

Distribution Statement : APPROVED FOR PUBLIC RELEASE