Problems for Chapter 3 3.I. In the binary system of Fig. 3.38, determine the following: a. The temperature at which 30 wt\% of B crystals are in equilibrium with a liquid composed of 60wt%B and 40 wt %. b. The composition of the sample described in part a. c. Show by means of a sketch how the microstructure of this sample would look at the temperature determined in part a. d. Show by means of a sketch the appearance of the microstructure for this sample if it were cooled to 500C. 3.2. System V2O3NiO (Fig. 3.39). a. Label all areas in the diagram. b. Make an isoplethal study in the system on cooling a melt of 45 Fig. 3.39. System V2O5NiO (after C. Brisi, Ann. Chim. (Rome), 47[78]806(1957) ). 46 O. Calculate before and after each Problems for Chapter 3 3.I. In the binary system of Fig. 3.38, determine the following: a. The temperature at which 30 wt\% of B crystals are in equilibrium with a liquid composed of 60wt%B and 40 wt %. b. The composition of the sample described in part a. c. Show by means of a sketch how the microstructure of this sample would look at the temperature determined in part a. d. Show by means of a sketch the appearance of the microstructure for this sample if it were cooled to 500C. 3.2. System V2O3NiO (Fig. 3.39). a. Label all areas in the diagram. b. Make an isoplethal study in the system on cooling a melt of 45 Fig. 3.39. System V2O5NiO (after C. Brisi, Ann. Chim. (Rome), 47[78]806(1957) ). 46 O. Calculate before and after each