“…It is revealing to note that the systems reported to undergo shock-induced chemical reaction, e.g., Ni+Ti; Ti+Si; Nb+Si; and Ni+Si (shown centre-filled), are clustered near the origin, where the impedance and yield strength differences are least. 33,36,38,39,87,100 On the other hand, those systems that remain inert, Ni+Al; Mo+Si; Ti+Al (shown centre-crossed), are far removed from the origin, and are associated with large differences in intrinsic properties. 85,92,103,132 From the distribution of data, it appears that shock-induced reaction will be suppressed above impedance and strength differences of ~175% and ~200%, respectively.…”