Ultrasonic wave velocity measurement, elastic properties determined

Rosen (1971) is the only investigator known by the writer to have measured the temperature dependence of the elastic properties of ytterbium. Using an ultrasonic pulse technique (10 MHz) to determine acoustic wave velocities in polycrystalline ytterbium Rosen obtained the results given in figs. 8.85 and 8.86. He corrected the acoustic wave path length for thermal expansion. The values of E, G and d increase smoothly with decreasing temperature and approach the... 

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