My understanding of this is that when coated with a layer of aluminum oxide it can withstand impressive loads.
begin quote from wikipedia:
Aluminum polymer composite
From Wikipedia, the free encyclopedia
Aluminum foamSpherical aluminum foam pieces bonded by polymers produced foams that were 80-95% metal. Such foams were test=manufactured on an automated assembly line and are under consideration as automobile parts.
Thermal conductivityExperimentally determined thermal conductivity of specific APCs matched both the Agari and Bruggeman models provide a good estimation for thermal conductivity. The experimental values of both thermal conductivity and diffusivity have shown a better heat transport for the composite filled with large particles.
- Clark, Joel P. (October 1998). "Future of Automotive Body Materials: Steel, Aluminum & Polymer Composites" (PDF). Retrieved February 2014. Check date values in: