Reactivity of mechanoactivated Ni-Al blends

Abstract

Mechanoactivation (MA) of Ni-Al blends was found to result in formation of nanosized diffraction-silent particulates whose content increased with increasing MA duration (τ). Upon MA, the ignition temperature for the blends under study was found to decrease by a value of 300–350°C. The main reaction stages were elucidated by time-resolved XRD. An increase in the reactivity of mechanically activated powder blends was associated with formation of nanosized diffraction-silent phases and solid solutions.