This make me remember an episode of mythbuster..... whatever, thermite is made of more the one substance, so that mean ( if we want to be as realistic as possible ) that we can seperate the substances, that would mean that we would have to create 3 new powders instead of 1 and I don't think that the people that would work on it would like to triple the work. But I think that it's a good idea, but I have a question : what ' fuel ' would you use? 'Cause wikipedia says that the reaction change a little with the kind of fuel ( If I have understand correcly)

From your link:


Thermites can be a diverse class of compositions. The fuels are often aluminium, magnesium, calcium, titanium, zinc, silicon, and boron. The oxidizers can be boron(III) oxide, silicon(IV) oxide, chromium(III) oxide, manganese(IV) oxide, iron(III) oxide, iron(II,III) oxide, copper(II) oxide, and lead(II,III,IV) oxide.[1]
The most common thermite is aluminium-iron(III) oxide.



Red iron(III) oxide (Fe2O3, commonly known as rust) is the most common iron oxide used in thermite. Magnetite also works. Other oxides are occasionally used, such as MnO2 in manganese thermite, Cr2O3 in chromium thermite, or copper(II) oxide in copper thermite, but only for highly specialised purposes. All examples use aluminium as the reactive metal. Fluoropolymers can be used in special formulations, Teflon with magnesium or aluminium being a relatively common example. Magnesium/teflon/viton is another pyrolant of this type.

In principle, any reactive metal could be used instead of aluminium. This is rarely done, however, because the properties of aluminium are ideal for this reaction. It is by far the cheapest of the highly reactive metals; it also forms a passivation layer making it safer to handle than many other reactive metals. The melting and boiling points of aluminium also make it ideal for thermite reactions. Its relatively low melting point (660 °C, 1221 °F) means that it is easy to melt the metal, so that the reaction can occur mainly in the liquid phase[9] and thus proceeds fairly quickly. At the same time, its high boiling point (2,519 °C (4,566 °F)) enables the reaction to reach very high temperatures, since several processes tend to limit the maximum temperature to just below the boiling point.[10] Such a high boiling point is common among transition metals (e.g., iron and copper boil at 2,887 °C (5,229 °F) and 2,582 °C (4,680 °F) respectively), but is especially unusual among the highly reactive metals (cf. magnesium and sodium which boil at 1,090 °C (1,990 °F) and 883 °C (1,621 °F) respectively). Further, the low density of the aluminium oxide formed as a result of the reaction tends to cause it to float on the iron, reducing contamination of the weld.


So what kind of metal would you use?

i saw that to