vacuum induction furnace with glass slag. In this case it would be Fi 
possible to get the sample by high purity and homogenization. mi 
ph 
B. Microstructure mi 
The microstructure of supercooled Ni-Sn eutectic consists of regions Th 
of normal lamellar eutectic and regions of irregular eutectic. (fig.5, 
fig. 6). 5° 
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Fig. 5 - Photomicrograph of Ni-32,5% Sn eutectic specimen 
supercooled 100 deg. Magnification 550 times. 
Fi 
ca 
Flg. 16 — Photomicrograph of Ni-32,5% Sn eutectic specimen Li’ 
supercooled 35 deg. Magnification 2200 times. 
50: