Investigations of thermodynamic and kinetic parameters of the process of nitrogen absorption by highly reactive metals in conventional oscillation state (method of levitation melting) have been carried out [1, 2].
Nitrogen absorption by highly reactive metals (niobium, vanadium, zirconium) in arc and plasma melting at temperature and partial pressure values of nitrogen, used in case of levitation melting [1], has been investigated in order to be able to compare the results.
It is necessary to pay attention at the fact that rate of nitrogen absorption in arc melting is higher than in levitation melting, but lower than in plasma heating (see Figure 3).
In levitation melting rate of nitrogen absorption by niobium is described by equation of second order, while in arc and plasma melting--by equation of first order.