Abstract
This thesis presents a study on inducing exceptionally large elastic strains in metallic thin films. This is enabled by a novel concept of 'lattice strain matching' using martensitic phase transforming NiTi substrates. Using this unique film-on-NiTi design, reversible and repeatable elastic strains up to 6.88% were achieved in Nb thin films. Such elastic lattice strains approach the theoretical limit and are unprecedented in the literature. In this study, a new XRD-based method for determining stress/strain states of textured thin films was also developed. The work also enables future development of elastic strain engineering of functional materials.
Original language | English |
---|---|
Qualification | Doctor of Philosophy |
Awarding Institution |
|
Supervisors/Advisors |
|
Thesis sponsors | |
Award date | 19 Oct 2020 |
DOIs | |
Publication status | Unpublished - 2020 |