Quasicrystals
en.wikipedia.org
en.wikipedia.org
But maybe this video is similar in content to the talk you saw?
The wiki mentions: "The Nobel citation said that quasicrystals, while brittle, could reinforce steel "like armor"
I'm seeing a lot of potential here for building more stable, unbreakable structures here for much cheaper.
(Also, Gundams becoming much more viable!!!)