Accession Number : AD0375936

Title :   STABILITY OF LMH-2 IN LIQUID CARRIERS.

Descriptive Note : Quarterly rept. no. 1, 6 Jan-31 Mar 66,

Corporate Author : ETHYL CORP BATON ROUGE LA RESEARCH AND DEVELOPMENT DEPT

Personal Author(s) : Frey,F. W. ; Marlett,E. M. ; Sanders,R. N.

Report Date : APR 1966

Pagination or Media Count : 16

Abstract : Long-term storage stability tests were made with slurries of beryllium hydride and organometallic liquid carriers at 90 F. Systems containing triethylaluminum, diethylaluminum hydride, diethylberyllium and triethylborane at 23% ullage evolve gas at 5-15 mm/month, or 0.6-0.00006 cc/lb-min. Systems containing trimethylaluminum and dimethylaluminum hydride produce gas at rates of 20-30 mm/month, or 8-19 cc/lb-min. The complex Be(Et3AlH)2 is completely stable but when slurried with beryllium hydride develops pressure at 10 mm/mo., or evolves gas at 0.00004 cc/lb-min. The Be(Et2Bh2)2 complex either alone or mixed with beryllium hydride evolves hydrogen at the rate of about 80 mm/mo., or 0.00044 cc/lb-min. The source of initial gassing was found to be gases (mostly nitrogen) adsorbed on the surface of the beryllium hydride. A vacuum bake at 130 C followed by treatment with helium largely eliminated initial gassing and improved the material handling properties. Synthesis of Be(B3H8)2 for evaluation as a liquid carrier was attempted unsuccessfully. Standard heats of formation for two compounds were calculated.

Descriptors :   (*METALS, *HYDRIDES), (*SLURRY FUELS, STABILITY), (*METALORGANIC COMPOUNDS), SYNTHESIS, HEAT OF FORMATION, PRESSURE, DECOMPOSITION (U) *LIQUID ROCKET PROPELLANTS, ALUMINUM, BERYLLIUM, METALORGANIC COMPOUNDS, BORANES, GELS, STORABLE ROCKET PROPELLANTS, COLLOIDS, HELIUM, NITROGEN

Subject Categories : Liquid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE