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(a) What is the difference between the states of phase equilibrium and metastability?

(a) What is the difference between the states of phase equilibrium and metastability?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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(a) What is the difference between the states of phase equilibrium and metastability? (b) Explain with the aid of neatly drawn binary phase diagrams the following terms? i. Isormophous phase diagram ii. Eutectic Isotherm iii. Peritectic point (c) in the Cu and Ag phase diagram shown in Figure 1.1, consider an alloy composition of 40 wt% Cu - 60 wt% Ag. Composton t RND 1200 20 GO 80 100 2200 2000 LIQUOLS 1000 Lquto :000 ... :600 8.0 :400 912 :200 G00 Somus :000 B00 400 G00 200 400 100 20 40 60 Composition wes AD Figure 1.1: Cu - Ag Phase Diagram i. What Phases are present in the Alloy at 800° C? i. What are the compositions of present phases if the alloy is cooled by 20° C? iii. What are the mass fraction of phases? If the alloy was further cooled by 2° C, determine the volume fraction of the phases? Take the densities of Cu and Ag as 8.96 and 10.49 g/cm' respectively. iv.
Transcribed Image Text:(a) What is the difference between the states of phase equilibrium and metastability? (b) Explain with the aid of neatly drawn binary phase diagrams the following terms? i. Isormophous phase diagram ii. Eutectic Isotherm iii. Peritectic point (c) in the Cu and Ag phase diagram shown in Figure 1.1, consider an alloy composition of 40 wt% Cu - 60 wt% Ag. Composton t RND 1200 20 GO 80 100 2200 2000 LIQUOLS 1000 Lquto :000 ... :600 8.0 :400 912 :200 G00 Somus :000 B00 400 G00 200 400 100 20 40 60 Composition wes AD Figure 1.1: Cu - Ag Phase Diagram i. What Phases are present in the Alloy at 800° C? i. What are the compositions of present phases if the alloy is cooled by 20° C? iii. What are the mass fraction of phases? If the alloy was further cooled by 2° C, determine the volume fraction of the phases? Take the densities of Cu and Ag as 8.96 and 10.49 g/cm' respectively. iv.
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