Generating large elastic strains in thin films utilising martensitic phase transformation of NiTi substrate

Farid Motazedian

Research output: ThesisDoctoral Thesis

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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 languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Supervisors/Advisors
  • Yang, Hong, Supervisor
  • Martyniuk, Mariusz, Supervisor
  • Wu, Gordon, Supervisor
Thesis sponsors
Award date19 Oct 2020
DOIs
Publication statusUnpublished - 2020

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