Fig. 12.—Melted at 550° C., cast in iron Fig. 13.—Chilled piece of Figs. 11 and 
chilled mold. Horizontal lower 12 reheated at 230° C. for 1 hour. 
section. x 50 x 100 
Fig. 14.—Chilled piece of Figs. 11 and 
12 reheated to 240° C. for 2 hours. 
x 100 
An inspection of the table and photomicrographs shows that appreciable 
growth and segregation take place even at temperatures as low as 225° 
this temperature being practically at the lower boundary of the area of for- 
mation of etin-copper and near the lower boundary of the y-tin-antimony 
range. As this temperature is well below the liquidi for both binary systems 
involved in the alloy here used it will readily be seen that practical melting 
and casting of bearings of Babbitt metal is necessarily done at consid- 
erably higher temperatures, thus offering correspondingly greater oppor- 
tunity for crystal growth and segregation. It may be remarked that Galla- 
gher found* a very slight crystal growth after several weeks heating at 218° 
C., a temperature below the solidi for both binary systems. 
*J. Phys. Chem.,10, 93 (1906). 
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