I have something I want to remove rust from, so I have been thinking about sand blasting. Thus, this thought popped into my head: how spectacular would it be to use aluminum powder? (To be clear, I am not going to try this.)
My wife’s reaction to this was “You guys…” but I know she would absolutely want to watch if someone was going to try it.
that brings childhood memories. Not too microscale though. Rust was everywhere in USSR. Small buckets of rust, small buckets of aluminum powder. When we experimentally discovered the reaction - we were too young still for school chemistry lessons - it was "microscale" - we burned a hole in the kitchen table in my friend's apartment (like a true hero he told his parents that he was alone and received the punishment :) We also tried to make a rocket using the mix as the rocket fuel - it burned the whole rocket like a huge firework :)
Certainly a ball peen hammer that could be encouraged to go rusty for scientific purposes. I wonder if it would work well enough striking a sheet of aluminum foil on a hard flat surface?
Hammer faces would work (def wear goggles!!!). Hit the face of the disposable one with a mixture of hydrogen peroxide, vinegar and salt and wait an hour.
Based on the title I was expecting to see “energetic materials”, which are carefully engineered variants of thermite.
For example, alternating layers of aluminium and iron oxide can be deposited in the same manner as seen in chip production by evaporating the materials in a vacuum chamber.
This allows layers tens of nanometers thin, essentially a perfect mixing and a very intimate contact between the reactants.
Some of these materials have far more bang per unit mass than conventional explosives.
I would guess you need something rigid and dense to generate enough pressure, though I don’t know if that rules out your suggestion. It does not have to be a ball.
My wife’s reaction to this was “You guys…” but I know she would absolutely want to watch if someone was going to try it.
Some vendor on AliExpress? Those Lucky Iron Fish?
For example, alternating layers of aluminium and iron oxide can be deposited in the same manner as seen in chip production by evaporating the materials in a vacuum chamber.
This allows layers tens of nanometers thin, essentially a perfect mixing and a very intimate contact between the reactants.
Some of these materials have far more bang per unit mass than conventional explosives.
https://en.wikipedia.org/wiki/Nano-thermite