Abstract
The results of experimental studies of melting and crystallization of Bi-Sn eutectic alloy on carbon, bismuth and tin substrates are presented. Bi-Sn layered films with different mass ratio of components have been used as model systems. The films have been formed by successive condensation of components in a high vacuum on the AT-cut of a quartz single crystal. The phase state of the system was traced in the heating-cooling cycles by a jump-like change of the quartz resonator Q-factor upon its excitation at the fundamental frequency. The values of supercooling during crystallization (89 K) and a wetting contact angle (112°) have been determined for Bi-Sn eutectic being in contact with the carbon substrate. The supercooling values for the liquid phase of the eutectic composition, which crystallizes on bismuth- (3 K) and tin-based (7 K) substrates, have been measured for the first time. The liquid-solid interfacial energy value of Bi-Sn eutectic alloy was assessed.
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