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The elastic constants of the intermetallic compound Ag2Al from 77° TO 700°K

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
28
Issue
11
Identifiers
DOI: 10.1016/0022-3697(67)90234-x

Abstract

Abstract The five independent elastic constants of the hexagonal intermetallic compound Ag 2Al were determined by means of the ultrasonic pulse-echo technique over the temperature interval 77° to 700°K. The values obtained at 298°K are: c 11 = 1·415 , c 33 = 1·685 , c 44 = 0·341 c 66 = 0·284 , and c 13 = 0.747 , all expressed in units of 10 12 dyn/cm 2. The linear compressibility parallel to the c-axis, calculated from these elastic constants is smaller than the compressibility perpendicular to the c-axis, in agreement with the less-than-ideal c a ratio. Extrapolating the elastic constants to 0°K, the Debye temperature was calculated to be 276°K.

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