Change of Ultrasonic Wave Velocity in Indium near the Melting Point

概要

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The ultrasonic wave velocity of indium was precisely measured in the tem-perature range from 120 to l83'C including the melting point. An ultrasonicpulse transmission method was used and the adopted sound frequency was 1MHz. The melting point of the specimen was 156.4'C.The sound velocities were 2504 mis in the solid phase just below the meltingpoint and 2297 m/s in the liquid phase just above the melting point. The tem-perature coefficients of the sound velocity were 0.191 m/s-deg in the solid phaseand 0.254 m/s = deg in the liquid phase.By combining the present results with existing data of thermal expansivityand specific heat, the elastic properties of indium at and around the meltingtemperature were reduced, and discussion was made on the obtained results.
社団法人日本物理学会の論文
1983-08-15