Thermal Stability and Kinetic Studies of LMH-1
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 Al(OH)3, 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0509735
Entities
People
- Charles B. Roberts
- Edwin J. Wilson