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(Solved): In the Animated Figure 9.8 is shown the lead-tin phase diagram. For an alloy of composition 25wt%Sn ...
In the Animated Figure 9.8 is shown the lead-tin phase diagram. For an alloy of composition
25
wt
%
Sn
?
75
wt
%
Pb
, select the phase(s) present and their composition(s) for each of the temperatures cited. (a)
30
0
?
C
?
L
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
10.0
wt
%
Sn
?
90.0
wt
%
Pb
L
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
L
=
90.0
wt
%
Sn
?
10.0
wt\% Pb ;
?
=
10.0
wt\% Sn-90.0 wt\% Pb
L
=
10.0
wt
%
Sn
?
90.0
wt
%
Pb
;
?
=
10.0
wt\% Sn-90.0 wt\% Pb (b)
20
0
?
C
?
L
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
?
=
17.0
wt
%
Sn
?
83.0
wt
%
Pb
;
L
=
55.7
wt
%
Sn
?
44.3
wt
%
Pb
?
=
18.3
wt
%
Sn
?
81.7
wt
%
Pb
;
?
=
97.8
wt
%
Sn
?
2.2
wt
%
Pb
?
=
17.0
wt
%
Sn
?
83.0
wt
%
Pb
;
?
=
55.7
wt
%
Sn
?
44.3
wt
%
Pb
(c)
18
3
?
C
?
?
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
?
=
18.3
wt
%
Sn
?
81.7
wt
%
Pb
;
?
=
97.8
wt
%
Sn
?
2.2
wt
%
Pb
L
=
61.9
wt
%
Sn
?
38.1
wt
%
Pb
;
?
=
18.3
wt
%
Sn
?
81.7
wt
%
Pb
;
?
=
97.8
wt
%
Sn
?
2.2
wt
%
Pb
L
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
25.0
wt\% Sn - 75.0 wt\% Pb;
?
=
25.0
wt\% Sn-75.0 wt\% Pb (d)
10
0
?
C
?
L
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
5.1
wt
%
Sn
?
94.9
wt
%
Pb
;
?
=
98.7
wt
%
Sn
?
1.3
wt
%
Pb
?
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
?
=
5.1
wt
%
Sn
?
94.9
wt
%
Pb
;
?
=
98.7
wt
%
Sn
?
1.3
wt
%
Pb
L
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
25.0
wt
%
Sn
?
75.0
wt
%
Pb
;
?
=
25.0
wt
%
Sn
?
75.0
wt\% Pb
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