Answered: A) Identify all congruent reactions and…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A) Identify all congruent reactions and their coordinates in the phase diagram
B) Identify all invariant reactions (reaction type and coordinates) in the phase diagram
C) Starting from a liquid at 70 at.% Ni and 1800 degrees C, cool the liquid slowly such that thermodynamic equilibrium is always maintained.
C1) At what temperature does solid first appear?
C2) Identify the solid phase which appears first from the liquid state and its approximate composition
C3) At what temperature does the liquid finally disappear?
C4) What is the liquid composition when it finally disappears
C5) Identify the last solid phase which appears during cooling and the temperature at which this last solid phase appears
C6) At the point where the last solid phase appears during cooling, identify the phases present, give their compositions, and calculate their fractions

Problem 1. Al-Ni phase diagram
The Al – Ni phase diagram is given below.
mum Weight Percent Nickel
10
20
30
40 50
60
70
80
10
1800
06
1638°c
1600
1455°C
1400
AINI
1395 1385
INDE
(Ni)
1200
1133°C
1000
854°C
660.452
800
~700°C
639.9°C
600-
(Al)
AlgNis
AIN13
400
10
20
30 0
40
50
60
70
80
90
10
A1
muim Atomic Percent Nickel
inte
AlgNi
Al3Niz

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