Accession Number:

AD0621606

Title:

LOW TEMPERATURE ELASTIC CONSTANTS OF POTASSIUM.

Descriptive Note:

Revised ed.,

Corporate Author:

JOHN CARROLL UNIV CLEVELAND OHIO

Personal Author(s):

Report Date:

1964-07-23

Pagination or Media Count:

9.0

Abstract:

The adiabatic elastic constants of single crystal potassium were measured as a function of temperature from 195 K to 4.2 K by the ultrasonic pulse-echo technique. The measured elastic constants at 4.2 K in units of 10 to the 10th power dyn-cm 2 are as follows C 2.86, C 0.377, C sub n 6.65, and B sub s 3.66. The shear constants C and C are interpreted in terms of Fuchs electrostatic contribution to the shear stiffnesses of the alkali metals. Significantly, this work yields an elastic anisotropy, CC, at 4.2 K which is in agreement with Fuchs theoretical calculation. The results are also compared to Benders values of the elastic constants at 83 K and with Swensons isothermal compressional data.

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE