Fabrication of Polytetrafluoroethylene Coated Micron Aluminium with Enhanced Oxidation.

ABSTRACT: Aluminium (Al) powders of micron size are widely applied to energetic materials as a high energy fuel. However, its energy conversion efficiency is generally low due to low oxidation activity. In this paper, a polytetrafluoroethylene (PTFE) coating layer with both protection and activation action was successfully introduced onto the surface of Al via adsorption and following heat treatment. The preparation conditions were optimized and the thermal activity of this core-shell composite material was studied. The potential enhancement mechanism for Al oxidation was proposed. The results showed that PTFE powders deformed into membrane on the surface of Al after the sintering process. This polymer shell could act as an effective passivation layer protecting internal Al from oxidation during agi

SUBMITTER: Zhao B 

PROVIDER: S-EPMC7435380 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature