Publications Details
Shock-induced reaction synthesis of aluminides and silicides
Shock-induced reaction synthesis (SRS) is used for solid state processing of Ni-Al, Ni-Si, and Nb-Si type compounds, starting with elemental powder mixtures. The constituent elemental powders are blended in different stoichiometries and packed at 65% density in stainless steel capsules. A steel flyer plate, accelerated by the detonation of an explosive, impacts the powder containing capsules embedded in a steel recovery fixture backed by a momentum trap. The shock wave generated upon impact triggers a self-sustaining, exothermic reaction between the elemental powder constituents, thereby synthesizing the compound and at the same time consolidating the porous mass into 12mm diameter by 5mm thick compacts. The characteristics of the SRS technique and the structural features of the shock synthesized products will be discussed. 18 refs., 11 figs.