Abstract
In the present work; nanocrystalline porous aluminum samples are manufactured using reactive spray atomization following an efficient procedure. The samples showed the best specific energy absorption density value in compression for aluminum on densification close to 0.06 MJ kg−1 at quasistatic loading, which is the best-recorded value for a bulk material according to authors knowledge. The reasons for such high compression plastic properties are due to a nano-sized intermetallic phase Al2Cu and nano stringers Al2O3 located on the walls of elliptical shape thick wall pores. The aforementioned structural features increased the strength for these samples and enabled absorption of high energy more than other materials. The high performance of the prepared samples and the cheapness of the present method can open new horizons for aerospace and automotive aluminum industries.
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