Compared to standard alloys with only one or two base metals, HEAs have significantly better energy-to-weight ratios, higher tensile power, and greater resistance to fracturing, corrosion, and oxidation. They are composed of two or more metallic components, sometimes with metalloids or chalcogenides added. They embrace, for instance, NaCd2, with 348 sodium atoms and 768 cadmium atoms within the unit cell.
A lump of metal could be crushed into a skinny sheet (it’s malleable) or may be pulled into skinny wires (it’s ductile). Metal is hard to pull apart (it has a excessive tensile power) or smash (it has a excessive compressive strength). If you push on a long, skinny piece of metal, it’s going to bend, not break (it is elastic). Except for cesium, copper, and gold, metals have a impartial, silvery shade.
Linus Pauling tried to describe the structure of NaCd2 in 1923, but didn’t succeed until … Read More