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Published on Jun 27, 2014
This is a follow-up video of the gallium-tipped bullets. What IF some of the gallium had adhered or got embedded in the aluminum heatsink? As you can see, even a small amount of gallium will destroy a much larger chunk of aluminumiumum. :) You can see why the general idea of a gallium-tipped bullet seemed completely feasible, at least in theory.
Gallium attacks most other metals by diffusing into their metal lattice. Gallium, for example, diffuses into the grain boundaries of aluminium-zinc alloys or steel, making them very brittle. Gallium easily alloys with many metals, and is used in small quantities as a plutonium-gallium alloy in the plutonium cores of nuclear bombs, to help stabilize the plutonium crystal structure. (per wikipedia)