Options
Verifying Larché-Cahn elasticity, a milestone of 20th-century thermodynamics
Citation Link: https://doi.org/10.15480/882.2179
Publikationstyp
Journal Article
Date Issued
2018-10-05
Sprache
English
Author(s)
TORE-DOI
TORE-URI
Volume
115
Issue
43
Start Page
10914
End Page
10919
Citation
Proceedings of the National Academy of Sciences of the United States of America 43 (115): 10914-10919(2018)
Publisher DOI
Scopus ID
Publisher
National Acad. of Sciences
Many materials phenomena are governed by the interaction between chemistry and mechanics. However, it was only in the second half of the 20th century that the theory of open system elasticity by Francis Larché and John W. Cahn concatenated the fields of solid mechanics and alloy chemistry. As the theory's central materials descriptors, the open system elastic parameters describe how solids deform under stress when solute can rearrange at equilibrium while the chemical potential is held constant. Here, we report experiments verifying the predictions for these parameters. We study the elasticity of nanoporous Pd-H and Pd-Au-H during load cycles imposed by a dynamic mechanical analyzer. Short diffusion paths afford fast equilibration of H in the local strain gradients that carry the macroscopic elastic deformation. The experiment is in excellent agreement with the theory, confirming a central prediction of one of the key contributions to 20th-century thermodynamics.
Subjects
alloy thermodynamics
elasticity
mechanochemical coupling
nanomaterials
solid mechanics
DDC Class
600: Technik
620: Ingenieurwissenschaften
Loading...
Name
10914.full.pdf
Size
1.45 MB
Format
Adobe PDF