Kinetics of mechanical activation of Al/CuO thermite

Explosive Burning of a Mechanically Activated Al and CuO Thermite Mixture

“…A mixture of components in a stoichiometric ratio (19/81 weight) was subjected to mechanical activation in vibration or planetary mills: Aronov mill and Activator-2SL. The activation process and results on the structure and reactivity of activated mixtures are described in detail in [27,28]. The activation process characterized by activation time t a and the activation dose D a , which connects by equation…”

“…where J is the power intensity of the activator, for Aronov mill J = 3.7 W/g, and for Activator-2SL J = 9.7 W/g [28]. The activation time varied from 2 to 20 min, which corresponded to the activation dose from 0.4 to 11 kJ/g.…”

“…Our earlier studies have shown that the burning rate of loose-packed activated mixtures exceeds 20 m/s, and the brightness temperature of the products is more than 3000 K [27,28].…”

Emission Spectroscopy of the Combustion Flame of Aluminium/Copper Oxide Thermite

“…Mostly, the disadvantage of higher sensitivity in comparison to micrometric thermites [17] and the problems resulting from the occupational and environmental impact of nano-materials [18] is accepted. Therefore, new preparation methods are the subject of ongoing research [19,20].…”

Preface

“…In this context, O'Quinn and coworkers apply in our next paper a very powerful analytical method (High-resolution Neutron Total Scattering experiments with Pair Distribution Function (PDF) analysis), to compare short-versus long-range structural features of a multicomponent oxide, pyrochlore-type Er 2 Ti 2 O 7 , obtained by two different powder processing methods: conventional solid-state reaction at high temperature and mechanical milling [7]. Our next group of papers deals with mechanochemical effects in the synthesis, structure and properties of a wide variety of inorganic systems including metal alloys [8][9][10][11][12][13][14], oxides [15][16][17][18] and composites [19][20][21]; these studies include for example using cryomilling (milling attrition of powders with a cryogenic medium) to obtain nanocrystalline highentropy alloys [8], a shaker mill to produce nonequilibrium alloys in immiscible systems at room temperature [9], obtaining nanoparticulated LiFeM 2-O 6 (M = Ge, Ti) pyroxenes [18] and assessing the reactivity of highly exothermic metal oxide thermitetype composites subjected to mechanical activation [20], to mention some. Another group of papers studies the synthesis and properties of lanthanidedoped silicon nitride nanowires [22], Ti and Hf carbides [23], Ni boride [24], Zr boride ceramics [25] and Cu-and Sn-based sulfides [26,27].…”