Thermite

Thermite is a pyrotechnic composition consisting of a fuel and an oxidizer that produces an exothermic oxidation-reduction reaction, typically involving metal powders. The most common form of thermite involves a mixture of aluminum powder and a metal oxide, often iron(III) oxide (rust). When ignited, the aluminum reacts with the iron oxide to produce molten iron and aluminum oxide, releasing a significant amount of heat in the process.