SURVEILLANCE STUDIES OF LMH-1
Abstract
Surveillance has continued on various samples of aluminum hydride including: unstabilized macrocrystalline, magnesium-doped, and magnesium doped, DPA (diphenylacetylene) treated AlH3-1451. These samples are providing valuable decomposition rate data both neat at -15, 25 and 40 C., and in propellant at 25, 40 and 60 C. Results of surveillance of neat aluminum hydride continue to indicate greater improvement in 25 C. stability than was observed with these samples at 60 C. Two samples which reached 1% decomposition in 18.8 and 25.5 days at 60 C. have decomposed only 0.05 and 0.019% respectively after 1 year at 25 C. Results of surveillance of aluminum hydride propellant are continuing to show decreasing gas generation rates with time. At 25 C., double base propellant containing unstabilized microcrystalline hydride decomposed approximately 0.28% and 0.09% during the first and second year respectively and samples containing stabilized aluminum hydride, decomposed only approximately 0. 10% during the first year. Small amounts of water in the environment which the aluminum hydride is subjected to have been found to prevent the typical autocatalytic shaped decomposition curve. Instead, an initial gassing period is observed followed by excellent stability. Treatments utilizing small amounts of hydrolysis to improve stability are being developed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1968
- Accession Number
- AD0389180
Entities
People
- E. J. Wilson
- K. Roberson