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 Constants of Polycrystalline Indium

Published

Author(s)

Sudook A. Kim, H M. Ledbetter

Abstract

Using an ultrasonic pulse-echo method, we measured the elastic constants of polycrystalline indium from 300 K to 5K. All elastic constants showed regular temperature behavior as predicted by an Einstein-oscillator model. The shear and Young moduli showed the largest change, increasing about 55% during cooling. The Poisson ratio is unusually high: 0.45, just below the theoretical upper bound 0.50. Using a Marx composite oscillator, we measured the internal friction at room temperature. We calculated the acoustic Debye temperature 108.4 K that agrees well with a monocrystal acoustic value 111.3 K and the specific-heat value 108.8 K. Also, er calculated the Grueneisen parameters γL=2.04, γH=2.68 that agree well with the specific-heat value γ=2.48 and the shock-wave value γ=2.24.
Citation
Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Volume
252
Issue
No. 1

Keywords

Debye characteristic temperature, elastic constants, Gruneisen parameter, indium internal friction, low-temperature, Marx oscillator, pulse-echo method

Citation

Kim, S. and Ledbetter, H. (1998), Low-Temperature Elastic Constants of Polycrystalline Indium, Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing (Accessed June 21, 2024)

Issues

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

Created August 1, 1998, Updated February 17, 2017