Water comes in three phases: solid (ice), liquid, and gas (steam). NiTi has
two different solid state phases. One way that we can learn about the differences
between high and low-symmetry phases of nickel-titanium alloy is by studying
the sound they make when dropped on a hard surface (their acoustic properties.)
Water changing phases.
Solid to liquid phase (left).
Liquid to gas phase (right).
NiTi has two solid phases with different acoustic properties.
NiTi changing from solid Austenite to solid Martensite phase.
