  We report on the fabrication of fractal dendrites by laser induced melting of
aluminum alloys. We target boron carbide (B4C) that is one of the most
effective radiation-absorbing materials which is characterised by a low
coefficient of thermal expansion. Due to the high fragility of B4C crystals we
were able to introduce its nanoparticles into a stabilization aluminum matrix
of AA385.0. The high intensity laser field action led to the formation of
composite dendrite structures under the effect of local surface melting. The
modelling of the dendrite cluster growth confirms its fractal nature and sheds
light on the pattern behavior of the resulting quasicrystal structure.
