By V I Lakomskii
Within the monograph, the writer summarises the consequences received in study and investigations of the gas-liquid steel procedure at temperatures general of electrical arc welding and electrometallurgy procedures. exact cognizance is given to the issues of sorption of diatomic homonuclear gases, in particular nitrogen from electrical arc plasma, by way of steel melts. it's proven that after the steel absorbs the gasoline from plasma the procedure doesn't achieve the thermodynamic equilibrium country. Investigations have been performed into approaches happening within the gas-plasma layer bordering with the steel. those approaches be sure the gasoline content material of liquid metal.
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Additional info for Alloying Liquid Metal with Nitrogen from Electric ARC Plasma
13 entropy units. 34 J/(g·atom·K), respectively. From these facts, it transpires that the experimental values of the standard partial entropy of hydrogen dissolved in liquid metals are quite close to the theoretical ones. Some erroneous experimental results can be found in Table 1. 93. When calculating the theoretical value , it was suggested that the *For calculations. the data of various authors have been used. All of them are reduced to one view: concentration is expressed in atomic fractions.
The value of Ks is essentially an equilibrium constant of dissolving reaction of a diatomic gas in metal (2). 5 Area of diatomic gases solution in solid metals obeying Sieverts' law in wide gas content range. that, in dilute solutions, the activity coefficient is assumed to be equal to one, then For a certain gas and metal, the value of K2 is only temperature-dependent. The temperature dependence of K2 and, hence, Ks is given by the Clausius-Clapeyron equation If is assumed to be non-dependent of temperature in its ranges studied, then, after integrating, equation (22) becomes Here K0 is the integration constant characterizing the change of the entropy of a gas when dissolving the latter in the metal bath.
This part of partial molar entropy is called, in the case of a solid body, configurational and, in case of a liquid solution, concentrational one. As seen from equation (10), the value of the second member is governed not by the kind of metal-solvent or the gas dissolved but solely by the concentration of the latter. The validity of the assumption on the constancy of value s for a certain gas is easy to check up in analysing experimental data concerning the solubility of this gas in various metals, but it is necessary to remember that the gas concentration in metal should be expressed, in this case, by such measurement units that would eliminate the influence of the kind of metal-solvent on value s.