Ultrasonic Study of Melting of Crystalline Solids
The present authors are investigating the phenomenon of melting transitions by measuring the attenuation of ultrasound in melting crystalline solids.Ice of normal water was chosen as the specimen material for the convenience of the experiment. A single crystal of ice is grown by the Bridgman method in a fused-quartz sample cell. Pulse ultrasound waves are emitted into the specimen by exciting a quartz transducer bonded on the outer wall of the cell. The attenuation of sound is measured at frequencies of 15–85 MHz by a pulse reflection method using the Matec apparatus. The determined attenuation values were shown to be reliable enough and to represent the true vibrational energy loss in the specimen /1/. The measurements are made at temperatures from − 8°C up to the melting point.
KeywordsDislocation Density Internal Friction Crystalline Solid Sound Frequency Specimen Material
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