Accession Number:

AD0509735

Title:

Thermal Stability and Kinetic Studies of LMH-1

Descriptive Note:

Final technical summary rept. 1 Nov 1967-31 Dec 1969,

Corporate Author:

DOW CHEMICAL CO MIDLAND MI PRODUCT DEPT LABS

Report Date:

1970-03-01

Pagination or Media Count:

95.0

Abstract:

The thermal stability of magnesium-doped aluminum hydride can be increased seven- to tenfold by controlled hydrolysis treatments compatibility with propellant ingredients is also greatly improved. A 5-day n-butylamine 2 H2O treatment at 80 C. is recommended for future use. Scanning electron photomicrographs reveal the surface characteristics of aluminum hydride crystals and show a thin coating, probably AlOH3, generated by hydrolysis treatments. Metallographic studies show that decomposition occurs throughout the crystal, particularly at discontinuities such as voids, cracks, and grain boundaries. Ion probe mass spectrometry shows a higher lithium content near the surface than in the interior of the crystals. Lithium aluminum hydride was extracted from AlH3- 1451 and is believed to be responsible for nucleation sites which result in the decomposition of AlH3. Pound quantities of stabilized AlH3 have been successfully used in high energy propellant formulations.

Subject Categories:

  • Inorganic Chemistry
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE