A binary alloy having 28 wt.% Cu and balance Ag solidifies at 779 °C. The solid consists of two phases a & ß. Phase a has 9% Cu whereas phase Bß has 8% Ag at 779 °C. At room temperature these are pure Ag and Cu respectively. Sketch the phase diagram. Label all fields and lines. Melting points of Cu and Ag are 1083 ° and 960 °C respectively. Estimate the amount of a and ß in the above alloy at 779 °C and at room temperature.
A binary alloy having 28 wt.% Cu and balance Ag solidifies at 779 °C. The solid consists of two phases a & ß. Phase a has 9% Cu whereas phase Bß has 8% Ag at 779 °C. At room temperature these are pure Ag and Cu respectively. Sketch the phase diagram. Label all fields and lines. Melting points of Cu and Ag are 1083 ° and 960 °C respectively. Estimate the amount of a and ß in the above alloy at 779 °C and at room temperature.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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Transcribed Image Text:d) A binary alloy having 28 wt.% Cu and balance Ag solidifies at 779 °C. The solid consists
of two phases a & ß. Phase a has 9% Cu whereas phase B has 8% Ag at 779 °C. At room
temperature these are pure Ag and Cu respectively. Sketch the phase diagram. Label all
fields and lines. Melting points of Cu and Ag are 1083 ° and 960 °C respectively.
Estimate the amount of a and ß in the above alloy at 779 °C and at room temperature.
Transcribed Image Text:1100
1085°
Liquid
1000
961.9°
a+ Liquid
900
B+ Liquid
Eutectic temperature
779°
800
B.
92%
e
8.8%
28.1%
700
Solvus
600
B+Eutectic
Solvus
a+ Eutectic
Eutectic
500
24%
composition
28.1%
400
10
100
Cu
20
30
40
50
60
70
80
90
Ag
Weight percent copper
Figure Q1
Phase diagram of the Ag – Cu system.
Temperature, °C
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