Unravelling the structural origin of cyclic fatigue in ferroelectrics. Ferroelectric materials have extensive applications in electromechanical devices and memories and in service are often subjected to repeat mechanical and/or electrical loading, leading to cyclic fatigue and failure. This project aims to apply in-situ electron microscopy techniques and computational modelling to explore cyclic ferroelectric fatigue behaviour and to understand the relationships between local atomic scale struct ....Unravelling the structural origin of cyclic fatigue in ferroelectrics. Ferroelectric materials have extensive applications in electromechanical devices and memories and in service are often subjected to repeat mechanical and/or electrical loading, leading to cyclic fatigue and failure. This project aims to apply in-situ electron microscopy techniques and computational modelling to explore cyclic ferroelectric fatigue behaviour and to understand the relationships between local atomic scale structure and fatigue. The structural origin of ferroelectric fatigue has not been clear because of the limitations of previous measurement capabilities. This project will provide guidance in materials design to increase ferroelectric fatigue lifetime for more reliable ferroelectric-based electronic devices.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100121
Funder
Australian Research Council
Funding Amount
$1,000,000.00
Summary
An analytical transmission electron microscope for the investigation of functional materials, earth processes and novel condensed matter. Sustainablity depends on the delivery of clean energy, pristine water and air, and the manufacture of consumer products with small environmental footprints. Modelling long-term impacts requires an understanding of the hydro-geological cycles. The technologies are well known—efficient electronics, fuel cells, lightweight composites, and so on—but delivery is ....An analytical transmission electron microscope for the investigation of functional materials, earth processes and novel condensed matter. Sustainablity depends on the delivery of clean energy, pristine water and air, and the manufacture of consumer products with small environmental footprints. Modelling long-term impacts requires an understanding of the hydro-geological cycles. The technologies are well known—efficient electronics, fuel cells, lightweight composites, and so on—but delivery is not straightforward. It is clear, however, that novel materials manipulated at fine scales will be key. Transmission electron microscopy (TEM) guides the development of sustainable technologies. The new TEM facility at ANU will accelerate current studies, by enhancing the materials research portfolio, and extending national and international collaborations in materials, geological and earth sciences.Read moreRead less
Dislocation motion and anelastic recovery in layered ceramic titanate. This project aims to research deformation and facture in brittle ceramic nanowire materials and anelastic behaviour in tensile deformation. Layered sodium titanate is used in energy storage and water treatment, but in-situ tensile tests have observed unconventional deformation behaviour, with significant dislocation motion and anelastic recovery. This project will study the deformation mechanism in layered sodium titanate nan ....Dislocation motion and anelastic recovery in layered ceramic titanate. This project aims to research deformation and facture in brittle ceramic nanowire materials and anelastic behaviour in tensile deformation. Layered sodium titanate is used in energy storage and water treatment, but in-situ tensile tests have observed unconventional deformation behaviour, with significant dislocation motion and anelastic recovery. This project will study the deformation mechanism in layered sodium titanate nanowires through molecular dynamics simulations, empirical interatomic potential, and in situ TEM experiments. Expected outcomes include knowledge of the deformation mechanism of this layered titanate which can be broadened to technologically important layered ceramic materials.Read moreRead less
New Ceramic: Fully Stabilised Monoclinic ZrO2 by Al2O3 + SiO2 Additions. Aim: To use conventional manufacturing and advanced manufacturing to produce an unprecedented form of zirconia: Fully stabilised monoclinic zirconia. Significance: The product utilises waste and inexpensive raw materials and it avoids the universal nanoscale transformation from the tetragonal and cubic forms of zirconia, which are commercialised. Outcomes: The product can have widespread uses in the chemical, refractory and ....New Ceramic: Fully Stabilised Monoclinic ZrO2 by Al2O3 + SiO2 Additions. Aim: To use conventional manufacturing and advanced manufacturing to produce an unprecedented form of zirconia: Fully stabilised monoclinic zirconia. Significance: The product utilises waste and inexpensive raw materials and it avoids the universal nanoscale transformation from the tetragonal and cubic forms of zirconia, which are commercialised. Outcomes: The product can have widespread uses in the chemical, refractory and mining industries and the technology aims to expand the industrial partner's commodity base from structural ceramics to high-tech ceramics. Benefits: Greater utilisation of waste and Australian raw materials, new commercialisation opportunities, new training and employment opportunities and breakthrough research.Read moreRead less
Ferroelectric piezoelectric materials and key problems associated with their applications in mechanical, electrical and optical energy transformations. This project aims to investigate the dynamic microstructure of ferroelectric piezoelectric materials in response to electrical fields or mechanical stresses, and therefore identify the factors enhancing the mechanical, electrical and optical couplings for intentional improvement and development of these materials for use in energy transformations ....Ferroelectric piezoelectric materials and key problems associated with their applications in mechanical, electrical and optical energy transformations. This project aims to investigate the dynamic microstructure of ferroelectric piezoelectric materials in response to electrical fields or mechanical stresses, and therefore identify the factors enhancing the mechanical, electrical and optical couplings for intentional improvement and development of these materials for use in energy transformations.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE120100036
Funder
Australian Research Council
Funding Amount
$440,000.00
Summary
National in-situ transmission electron microscope facilities. This project will establish six complementary transmission electron microscope (TEM) facilities at various locations. The establishment of the facilities will be a key step in developing advanced capacity in Australia and will support ground-breaking research in diverse material systems for various high-performing applications, including electronics, optoelectronics, light metals, biomaterials, energy, and environment.
Nanoscale characterisation and manipulation of complex oxide interfaces and topological boundaries. Working at the forefront of complex oxide materials research, this project will explore novel material properties and develop new material application concepts. The project will specifically investigate nanoscale interfaces for potential breakthrough applications in nanoscience.
Electronic charge separation at polar topological defects
- photovoltaics beyond the conventional p-n junction. The recent discovery of a fundamentally different mechanism for electronic charge separation, which operates over a distance of a few nanometres and produces voltages that are significantly higher than the material bandgap has opened a new and promising research direction. This novel effect is driven by previously unobserved nanoscale steps of the electrostatic potential that naturall ....Electronic charge separation at polar topological defects
- photovoltaics beyond the conventional p-n junction. The recent discovery of a fundamentally different mechanism for electronic charge separation, which operates over a distance of a few nanometres and produces voltages that are significantly higher than the material bandgap has opened a new and promising research direction. This novel effect is driven by previously unobserved nanoscale steps of the electrostatic potential that naturally occur at ferroelectric domain walls and can be reversed in polarity or turned off. By working at the frontier of complex oxide materials science, this project aims to discover and implement new design approaches for electronic energy harvesting using nanostructured polar oxides for novel applications in optoelectronic devices.Read moreRead less