Abstract: In order to study the properties of aluminum powder/polytetrafluoroethylene (Al/PTFE) mechanical activated energetic composites (MAECs), MAECs were prepared by high energy ball milling with different milling time. The micro morphology and surface element distribution of MAECs were analyzed. The phase structure and chemical structure of the materials were also characterized. Then the interaction between PTFE and different crystal surfaces of Al was studied by molecular dynamics. Research results showed that PTFE contact closely with Al to form a thin sheet with diameter of about 100 μm after a long period of strong mechanical energy. With ball milling more than 20 min, Al and PTFE dispersed uniformly, but there was a certain gap with the absolute dispersion. High energy ball milling brings only a change in the microstructure of Al/PTFE composites. The interaction between PTFE and different crystal surfaces of Al were dominated by Van der Waals’ force.
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2018, Vol. 32 
