Consider 2 kg of a (30 wt % Sn – 70 wt % Pb) solder alloy. The phase diagram of the lead-tin alloy (Pb- Sn) is shown in the figure below. (a) Calculate the amount of each phase present in the alloy at 300 °C. (b) Calculate the amount of each phase present in the alloy at 150 °C. (c) Calculate the amount of each phase present in the alloy at 100 °C. 327°C

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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QUESTION 2:
Consider 2 kg of a (30 wt % Sn – 70 wt % Pb) solder alloy. The phase diagram of the lead-tin alloy (Pb – Sn)
is shown in the figure below.
(a) Calculate the amount of each phase present in the alloy at 300 °C.
(b) Calculate the amount of each phase present in the alloy at 150 °C.
(c) Calculate the amount of each phase present in the alloy at 100 °C.
327°C
600
300
Liquid
500
232°C
a + L
200
183°C
B +L
400
18.3
61.9
97.8
300
100
a + B
200
|100
40
60
80
100
(Pb)
Composition (wt% Sn)
(Sn)
Temperature (°C)
20
Temperature ("F)
Transcribed Image Text:QUESTION 2: Consider 2 kg of a (30 wt % Sn – 70 wt % Pb) solder alloy. The phase diagram of the lead-tin alloy (Pb – Sn) is shown in the figure below. (a) Calculate the amount of each phase present in the alloy at 300 °C. (b) Calculate the amount of each phase present in the alloy at 150 °C. (c) Calculate the amount of each phase present in the alloy at 100 °C. 327°C 600 300 Liquid 500 232°C a + L 200 183°C B +L 400 18.3 61.9 97.8 300 100 a + B 200 |100 40 60 80 100 (Pb) Composition (wt% Sn) (Sn) Temperature (°C) 20 Temperature ("F)
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