Civil Engineering Reference
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Percent weight of material A
100
75
50
25
0
Liquidus
Melting point
of material B
Liquid
Liquid and
solid
Melting point
of material A
Solidus
Solid
0
25
50
75
100
Percent weight of material B
(a)
Percent weight of material A
100
75
50
25
0
p
lA
p
A
p
sA
Tie line
State
point
p
lB
p
B
p
sB
0
25
50
75
100
FIGURE 2.14
Binary
phase diagram, two soluble
elements.
Percent weight of material B
(b)
where
m
t
=
mass
of total material
of the total material that is in the liquid phase
of the total material that is in the solid phase
m
l
=
mass
m
s
=
mass
This mass balance also applies to each of the component materials; that is,
p
B
m
t
=
p
lB
m
l
+
p
sB
m
s
(2.5)
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