TUNGSTEN AND ROCKET MOTORS.
STANFORD RESEARCH INST MENLO PARK CALIF
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The erosion and thermal shock characteristics of tungsten were studied under conditions that simulated the exhaust of an aluminized rocket propellant. The erosion research consisted of two phases a static chemical reaction study, and a dynamic erosion study employing a plasma torch. The thermal shock study employed a specially constructed test apparatus using hollow cylindrical specimens to experimentally characterize the relative resistance of various types of tungsten. Of the materials studied, silver- and copperinfiltrated tungsten were found to have the best thermal shock resistance, and 80 dense pressed and sintered tungsten the poorest. Two thermal shock sensitivity parameters were de eloped to allow direct calculation of relative shock resistance from materials property data. The effects of specimen size, and of metallurgical and environmental parameters were also investigated. Author