Thermal P roperties and Kinetic Analy ses of Novel Highly Energetic Re active M aterials-Nano versus Micron Composites

Reactive Materials (RMs) are energeti c materials consisting of two or more solid-state reactants that together form a thermo-ch emical mixture. Typica l RMs includes metal-metal and/or metal-metal oxide mixtures with and witho ut polymer binders. R Ms have h igher predicted energy per unit v olume than conventional energetic materials and can provide altern ate kill mechanisms b esides tho se obtained for conventional ene rgetic mat erials. Relatively low rate of energy release in heterogeneous reactions presents the major bottleneck for m ost applications. Increase of reactive surface or reduction of reactive e lements to nano-size r esults in a quantitative increase in the reaction rate. Reactive Nano-ma terials have high specific reactive interface ar ea and high energy de nsity. Subst antial size reduction of each reactant powder from micro to nano-size leads to increase of r eaction fro nt propagation in some systems under unconfined condition s by approx imately two to three or der of magnitude. This is accomplished when nano-sized f uel and oxi dizer particles are mixed. The scaling of these reactants to the nano-sc ale has allow ed for several capabilities and applications that were not p reviously p ossible with conventional micro-sized RMs mixtures. A significan t size reduction of reac tant powde rs allows more intim ate contact. As a consequence of this significant reduction of size, n ew issues such as dispersion and mixing of rea ctants, safet y, and surface fictionalizations of fu el particles in order to minimize potential undesired reaction with oxygen and water vapor must be addressed. In recent times with advances in materials and material processi ng, reactive mixtures of aluminu m and TFEF have applications in energ etic materials [۱-۶]. But this study examines the thermal be havior and Kinetic An alyses of a novel triplet mixture of Tetrafluoroethylene fluorocarbon (TFEF) po lymer, CuO nano- size Al particles compared with micron-scale Al particles.

کلیدواژه ها:

reactive material ، thermal pro perties ، kinetic analyse s ، nanocomposites