Abstract
Temperature conditions for initiation of thermal explosion (volume reaction) in multilayer Ti/Al nanofoils were explored both experimentally and by numerical simulation. It is shown that there exists a critical heating rate below which thermal explosion of foil is not observed. Upon heating at rates above the critical value, the initiation temperature of thermal explosion (Tig) was found to decrease with increasing heating rate (Vh). A non-monotonous dependence of Tig on Vh was associated with formation of an intermetallic interlayer at the interface between Ti and Al layers in the solid-state reaction thermally induced during heating. Numerical simulation has shown that the interlayer gets thicker with decreasing heating rate, thus promoting an increase in Tig.
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