Highly reactive energetic films by pre-stressing nano-aluminum particles.

ABSTRACT: Energetic films were synthesized using stress altered nano-aluminum particles (nAl). The nAl powder was pre-stressed to examine how modified mechanical properties of the fuel particles influenced film reactivity. Pre-stressing conditions varied by quenching rate. Slow and rapid quenching rates induced elevated dilatational strain within the nAl particles that was measured using synchrotron X-ray diffraction (XRD). An analytical model for stress and strain in a nAl core-Al₂O₃ shell particle that includes creep in the shell and delamination at the core-shell boundary, was developed and used for interpretation of strain measurements. Results show rapid quenching induced 81% delamination at the particle core-shell interface also observed with Transmission Electron Microsc

SUBMITTER: Bello MN 

PROVIDER: S-EPMC9076265 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature