Ultrasonic Behavior of Liquid Tin-Bismuth Alloys above Melting Point

  • Kamioka Hiroaki
    Department of Physics, Faculty of Engineering, Gifu University
  • Sumino Yoshio
    Regional Center for Earthquake Prediction and Observation, Faculty of Science, Nagoya University

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  • Ultrasonic Behavior of Liquid Tin Bismu

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The sound velocity and its attenuation of three kinds of liquid tin-bismuth alloys, one eutectic composition of Bi/(Bi+Sn)=57.0 wt% and two hyper-eutectic compositions of Bi/(Bi+Sn)=63.5 and 66.7 wt%, were measured by the pulse transmission method over a range of temperatures extending from 139°C (eutectic temperature) to 190°C. The sound velocity of each liquid alloy shows the steady decrease with temperature in the measured temperature range, and the temperature coefficients of sound velocity in Bi57.0Sn43.0, Bi63.5Sn36.5 and Bi66.7Sn33.3, were −0.002, −0.589 and −0.660 m/s·deg at 170°C, respectively. By combining the present results with the previous data of density and thermal expansivity, the elastic and anelastic properties of liquid tin-bismuth alloys were reported, and discussion was made on the obtained results.

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