Using laser-driven flyer plates to study the shock initiation of nanoenergetic materials

18th APS-SCCM; 24th AIRAPT

Shaw, W.L.^1 ; Williams, R.A.^2 ; Dreizin, E.L.^2 ; Dlott, D.D.^1

School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana

IL

61801, United States^1

Newark College of Engineering, New Jersey Institute of Technology, University Heights, Newark

NJ

07102, United States^2

关键词: Arrested reactive milling;    Doppler velocimetry;    Fundamental mechanisms;    Initiation process;    Laser driven flyers;    Nanoenergetic materials;    Reactive materials;    Time-resolved emission spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/18/182010/pdf
DOI  :  10.1088/1742-6596/500/18/182010

来源: IOP

【 摘 要 】

A tabletop system has been developed to launch aluminium laser-driven flyer plates at speeds of up to 4 km/s. The flyers were used to initiate nanoenergetic reactive materials including aluminium/iron oxide and aluminium/molybdenum oxide thermites produced by arrested reactive milling. The flyer flight and impact was characterized by photon Doppler velocimetry and the initiation process by time-resolved emission spectroscopy. Impact initiation thresholds were determined for 50 μm thick flyer plates producing 10 ns shocks. The intensities, delays and durations of the emission bursts, and the effects of nanostructure and microstructure on them were used to investigate fundamental mechanisms of impact initiation.