Functionalized carbon fibers assembly with Al/Bi2O3: A new strategy for high-reliability ignition.

• CFO/Al/Bi 2 O 3 is formed by long-range electrostatic force and covalent interactions. • CFO/Al/Bi 2 O 3 used as energetic electric-thermal conversion component. • Replacement of the Ni-Cr or SCB to solve the problems caused by film interfaces. • To detonate RDX reliably without other bridges. Carbon fiber is used to construct an energy conversion component with the purpose of high reliability, safety and potential application in micro size. The carbon fiber oxidant (CFO) is endowed as the carrier for the assembly of CFO/Al/Bi 2 O 3 while long-range electrostatic force and covalent interactions are analyzed as the main force. The self-assembly can function with a voltage as low as 15.34 V and can detonate RDX successfully without using primary explosives and traditional bridge film unit. The ignition mechanism is deduced that carbon fibers have a transient high conductivity when the voltage is charged. The one-dimensional structure and micro-size make the puncture easily and reliably. Moreover, the integration of Al/Bi 2 O 3 enhanced its initiation power and reliability. The research broadens the understanding of carbon fiber as one-dimensional material, and more applications are expected in this new field by considering the variety of carbon fiber size, different sorts of reactive materials and so on. [ABSTRACT FROM AUTHOR]