explain the equilibrium cooling of melts of compositions 1,2,and 3 as indicated. ⊙人 中2 AB号 S AB 13.(a)Briefly explain the distinction between O in solution and combined oxygen.Explain how the use of deoxidizers in combination is beneficial both with respect to lowering o and promoting the separation of deoxidation products. (b)A melt of steel contains 0.02%C and 0.005%O.At the freezing point the solubility product of CO at Pco=1 atm is [C][%O]=0.002 Estimate the fraction of steel solidified before the melt becomes saturated with CO(Pco=1atm).The segregation coefficients for carbon and oxygen are approximately 0.3 and 0.0,respectively.Maximum segregation conditions apply. 14. Consider a group of binary systems for which the internal energy of both the liquid phase and the solid solution phase may be described adequately in terms of the regular solution model.The nearest-neighbor pair exchange energy is given as follows: 1 W=64B26u+5s） In general,the values of W for the liquid and solid solutions are different.Let Wi and Ws represent the values for the liquid and solid solutions,respectively. (a)If both Wi and Ws are zero,sketch the T-X diagram expected. (b)What conditions of Wi and Ws are necessary to create a eutectic system.Be quantitative.Use Gibbs energy-composition diagrams to illustrate your analysis. (c)Sketch a T-X diagram for Wi>0 and Ws 0. (d)If an intermetallic compound,AB,may be stable,what additional information is needed to predict the stability of a peritectic transformation?Sketch Gibbs energy composition diagrams.explain the equilibrium cooling of melts of compositions 1,2, and 3 as indicated. 13. (a) Briefly explain the distinction between O in solution and combined oxygen. Explain how the use of deoxidizers in combination is beneficial both with respect to lowering O and promoting the separation of deoxidation products. (b) A melt of steel contains 0.02% C and 0.005% O. At the freezing point the solubility product of CO at Pco = 1 atm is [% C] [% O] = 0.002. Estimate the fraction of steel solidified before the melt becomes saturated with CO (Pco=1atm). The segregation coefficients for carbon and oxygen are approximately 0.3 and 0.0, respectively. Maximum segregation conditions apply. 14. Consider a group of binary systems for which the internal energy of both the liquid phase and the solid solution phase may be described adequately in terms of the regular solution model. The nearest-neighbor pair exchange energy is given as follows: 1 ( ) 2 W AB AA BB =⋅ + ε ε ε In general, the values of W for the liquid and solid solutions are different. Let Wl and Ws represent the values for the liquid and solid solutions, respectively. (a) If both Wl and Ws are zero, sketch the T-X diagram expected. (b) What conditions of W1 and Ws are necessary to create a eutectic system. Be quantitative. Use Gibbs energy-composition diagrams to illustrate your analysis. (c) Sketch a T-X diagram for Wl > 0 and Ws < 0. (d) If an intermetallic compound, AB, may be stable, what additional information is needed to predict the stability of a peritectic transformation? Sketch Gibbs energy composition diagrams