Laser materials processing includes rapid heating to possibly high temperatures and cooling of the illuminated materials. The material reactions can show significant deviations from equilibrium processing. During complex combinations, it is mainly unknown how react mix. However, important know which chemical elements or compounds are present in define alloy. In addition, their distribution afte...

This paper presents a new method to ignite pure thermite powder by low-power microwaves ( 100 W). In this method, the microwave energy is supplied locally to the powder. It creates a confined hotspot, and initiates a self-propagating combustion in the entire powder volume. The coupled thermal–electromagnetic interaction evolved within the powder prior to its ignition is simulated theoretically,...

Fabrication of FeSi-Al2O3 composites with a molar ratio FeSi/Al2O3 ranging from 1.2 to 4.5 was conducted by the self-propagating high-temperature synthesis (SHS) method. The reaction involved metallothermic reduction Fe2O3 and SiO2 Al chemical interaction Fe Si. Two combustion systems were examined: one contained thermite reagents 0.6Fe2O3 + 0.6SiO2 2Al, other had 2Al mix different amounts Si p...

A mixture of copper complex and Al/CuO nanothermite, Al/CuO/CuC, represents one the state-of-the-art gas-generating thermite systems with various pyrotechnic applications due to its tunable gas release rates. The reactivity reactive inks loadings poly(vinylpyrrolidone) (PVP) binder mixed Al/CuO/CuC is characterized using high-speed imaging diagnostics pressure measurements. For a PVP mass fract...

In this paper the feasibility of NbAl3/Al2O3 nanocomposite formation through mechanochemical reaction between Al and Nb2O5 and the effect of mechanical activation on the kinetic and reaction mechanism were investigated. Structural and phase evolution during mechanical alloying were studied by employing transmission electron microscopy (TEM)...