An official website of the United States government
Here’s how you know
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.
The Effect of Interfacial Free Energies on the Stability of Microlaminates
Published
Author(s)
A C. Lewis, A B. Mann, D V. Heerden, Daniel Josell, Timothy P. Weihs
Abstract
Laminated composites with polycrystalline layers typically break down at high temperatures through grain boundary grooving and the pinch-off of individual layers. Such materials, when exposed to high temperatures, develop grooves where grain boundaries meet the interfaces between layers. The depths of the grooves are controlled by the ratios of grain boundary and interfacial free energies, gamma(subgb)/gamma(subint). Depending on the dimensions of the grains, these grooves can extend through the entire layer, causing pinch-off of the grain boundary. This pinch-off destroys the layering and eventually leads to a gross coarsening of the microstructure. Because microstructural stability of microlaminates is a necessary tool. An existing model of this capillarity-driven breakdown requires the interfacial free energies, gamma(subgb) and gamma(subint), as input parameters. Both biaxial and uniaxial zero creep tests have been used in conjunction with transmission electron microscopy to measure these interfacial energies in Ag/Ni and Nb/Nb(sub5)Si(sub3) microlaminates.
Citation
Conference Proceedings
Pub Type
Journals
Keywords
interfaces, multilayer, stability
Citation
Lewis, A.
, Mann, A.
, Heerden, D.
, Josell, D.
and Weihs, T.
(2021),
The Effect of Interfacial Free Energies on the Stability of Microlaminates, Conference Proceedings
(Accessed December 5, 2023)