Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Low-Temperature Elastic Coefficients of Polycrystalline Indium

Published

Author(s)

K Sudook, H M. Ledbetter

Abstract

Using an ultrasonic pulse-echo method, we measured the elastic coefficients of polycrystalline indium from 300 to 5K. All elastic coefficients showed regular temperature behavior, as predicted by an Einstein-oscillator model. The shear and Young moduli showed the largest change, increasing {difference of} 55% during cooling. The Poisson ratio was unusally high at 0.45, just below the theoretical upper bound of 0.5. Using a Marz composite oscillator, we measured the internal fraction at room temperature. We calculated the acoustic Debye temperature, 108.4 K. that agreed well with a monocrystal acoustic value, 111.3 K and the specific-heat value, 108.8 K. Also, we calculated the Gruneisen parameters γL = 2.04 γH = 2.68, that agreed well with the specific-heat value, γ=2.48 and the shock-wave value, γ=2.24.
Citation
Materials Science and Engineering
Volume
No. A252

Keywords

Debye characteristic temperature, elastic constants, gruneisen parameter, indium, internal friction, low temperatures, marx oscillator, pulse-echo method

Citation

Sudook, K. and Ledbetter, H. (1997), Low-Temperature Elastic Coefficients of Polycrystalline Indium, Materials Science and Engineering (Accessed May 26, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created November 1, 1997, Updated February 17, 2017