ULTRA LOW DENSITY ALUMINIUM-BASED CLOSED
|ULTRA LOW DENSITY ALUMINIUM-BASED
CLOSED CELL FOAMS
Cast aluminium foams demonstrate an interesting combination of properties
including ultra low density, high structural stiffness per unit mass, high
capacity for energy absorption compared to polymer foams, and high fire
DRDO has designed and developed a set up to produce
aluminium foams. Foam samples of approximately 90 mm dia and up to 450 mm
length have been produced. The cell structure across the section is uniform.
The relative density of foam is low. Compression tests to evaluate
properties like 'yield strength', Young's modulus and energy absorption were
carried out on 80 mm dia specimens. The properties of the foams are
comparable to those of a Japanese commercial product 'Alporas'.
Typical foam samples Cell structure
across foam section