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

Farid Motazedian

doi:10.26182/hh10-0p76

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

Farid Motazedian

School of Engineering

Research output: Thesis › Doctoral 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 language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Yang, Hong, Supervisor Martyniuk, Mariusz, Supervisor Wu, Gordon, Supervisor
Thesis sponsors	Australian Government Research Training Program
Award date	19 Oct 2020
DOIs	https://doi.org/10.26182/hh10-0p76
Publication status	Unpublished - 2020

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THESIS - DOCTOR OF PHILOSOPHY - MOTAZEDIAN Farid - 2020
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Cite this

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title = "Generating large elastic strains in thin films utilising martensitic phase transformation of NiTi substrate",

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.",

keywords = "Thin film, Martensitic phase transformation, Elastic strain engineering, NiTi, Shape memory alloy",

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year = "2020",

doi = "10.26182/hh10-0p76",

language = "English",

school = "The University of Western Australia",

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AU - Motazedian, Farid

PY - 2020

Y1 - 2020

N2 - 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.

AB - 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.

KW - Thin film

KW - Martensitic phase transformation

KW - Elastic strain engineering

KW - NiTi

KW - Shape memory alloy

U2 - 10.26182/hh10-0p76

DO - 10.26182/hh10-0p76

M3 - Doctoral Thesis

ER -

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

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