nonmetal-to-metal transitionplasma phase transitionThe nonmetal‐to‐metal transition in dense fluid helium is discussed, which has been, in analogy to metallization of hydrogen, predicted as first‐order plasma phase transition using chemical models for the equation of state and plasma composition. ...
Helium is used as a gas shield in the vicinity of arc welding preventing, for example, any reaction of hot metal welds with oxygen. The gas is used in the semi-conductor industry to provide an inert atmosphere for growing silicon and germanium crystals. It is also used as a high temperatu...