HIGH ENERGY PROPELLANT INGREDIENT RESEARCH AND DEVELOPMENT.
Abstract
Studies on the preparation and properties of AlH3-1451 continued. Magnesium has been incorporated into product made by the continuous crystallization technique; improved thermal stability is observed in product from the larger scale unit. Teflon FEP shows excellent promise as a material of construction; a larger scale crystallizer has been fabricated from FEP stock items. Structure studies of AlH3-1451 show the decomposition mechanism involves loss of hydrogen and formation of aluminum nuclei and anion vacancies. Density measurements of Mg-doped AlH3-1451 show that magnesium forms a substitutional solid solution. The degree of improvement in thermal stability of 'aged', Mg-doped batch samples of AlH3-1451 correlates with initial gassing observed at 60 C on a Taliani apparatus. Water, identified as a major component of the gas, may play a major role in the aging process. Heat treatment and storing under hydrogen increased the thermal stability of some AlH3-1451 samples. Double base propellant containing Mg-doped and Mg-doped, in situ DPA-treated AlH3-1451 shows a twofold improvement in stability over standard hydride at 25 and 40 C Mg-doped, in situ DPA-treated and Mg-doped, 'aged' AlH3-1451 are very stable at 60 C. Propellant containing 'aged', Mg-doped AlH3-1451 decomposed 0.57% after 146 days. Mg-doped, in situ DPA-treated AlH3-1451 reach 1% decomposition in double base propellant in 173 days; in composite propellant it reached 0.84% decomposition in 91 days.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 15, 1966
- Accession Number
- AD0376769
Entities
People
- Charles B. Roberts
- Edwin J. Wilson
- John A. Snover
- Norman F. Matzek
- Roger D. Daniels