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
Discovery Early Career Researcher Award - Grant ID: DE220100527
Funder
Australian Research Council
Funding Amount
$420,000.00
Summary
Novel high-performance copper-based materials via additive manufacturing. This project aims to develop novel high-performance copper-based materials produced by additive manufacturing for the electrification revolution, which will provide significantly higher mechanical performance, superior electrical and thermal properties and enable flexible complex shape options. Atomic-scale microstructural analysis using advanced microscopy techniques will reveal profound new insights into the process-stru ....Novel high-performance copper-based materials via additive manufacturing. This project aims to develop novel high-performance copper-based materials produced by additive manufacturing for the electrification revolution, which will provide significantly higher mechanical performance, superior electrical and thermal properties and enable flexible complex shape options. Atomic-scale microstructural analysis using advanced microscopy techniques will reveal profound new insights into the process-structure-property relationship. Expected outcomes include new understandings of the fundamental physics of new functional materials, eco-friendly products, and an ability to facilitate the increasingly widespread use of the copper-based materials for renewable electricity towards a more sustainable society and economy.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE200101105
Funder
Australian Research Council
Funding Amount
$423,856.00
Summary
Probing the nanomechanics of single grain boundary with decorated solutes. Grain boundaries (GBs) are thermodynamically susceptible to attract solutes to reduce system energy. Elaborately manipulating the GB nanostructure and chemistry via segregation can essentially be conducive, rather than detrimental, to materials performance. However, the underlying mechanism of GB segregation and its detailed effect on material properties remain elusive due to the GB complexities in the polycrystals. Throu ....Probing the nanomechanics of single grain boundary with decorated solutes. Grain boundaries (GBs) are thermodynamically susceptible to attract solutes to reduce system energy. Elaborately manipulating the GB nanostructure and chemistry via segregation can essentially be conducive, rather than detrimental, to materials performance. However, the underlying mechanism of GB segregation and its detailed effect on material properties remain elusive due to the GB complexities in the polycrystals. Through correlative in-situ nanomechanical testing and atom probe tomography, this project aims to unravel the rationale of segregation behaviour of individual GBs and its effectiveness to enhance the material performance, and hence enable nanostructural design of advanced metallic materials with unprecedented properties.Read moreRead less
Doped alumina with tailored material properties for battery applications. This project aims to develop tailored alumina materials for lithium ion battery separators through a novel in-situ approach that will: (1) produce uniform doped alumina for improved safety, (2) target specific surface and bulk material properties to increase the overall performance, and (3) reduce manufacturing costs by integrating the process with new technology developed for the production of high purity alumina. Signifi ....Doped alumina with tailored material properties for battery applications. This project aims to develop tailored alumina materials for lithium ion battery separators through a novel in-situ approach that will: (1) produce uniform doped alumina for improved safety, (2) target specific surface and bulk material properties to increase the overall performance, and (3) reduce manufacturing costs by integrating the process with new technology developed for the production of high purity alumina. Significant advances are proposed for overcoming current manufacturing limitations of doped alumina. Building research capacity and knowledge in battery material manufacturing will benefit a range of industries across Australia, whilst providing new opportunities for growth in local communities.Read moreRead less
Novel multiscale fibre composites for cryogenic space technologies. This project aims to develop new composite materials technologies for cryogenic space applications. Multifunctional nanomaterials with negative thermal expansion properties will be developed to simultaneously reduce thermal stress and improve fracture toughness, suppressing microcracking of fibre composites observed in current materials at cryogenic temperatures. New interleaves will be developed to act as gas barriers and provi ....Novel multiscale fibre composites for cryogenic space technologies. This project aims to develop new composite materials technologies for cryogenic space applications. Multifunctional nanomaterials with negative thermal expansion properties will be developed to simultaneously reduce thermal stress and improve fracture toughness, suppressing microcracking of fibre composites observed in current materials at cryogenic temperatures. New interleaves will be developed to act as gas barriers and provide strength. The composites will provide a new lightweight solution for storing cryogenic propellants such as liquid hydrogen and oxygen, for the next generation re-usable spacecraft. The outcomes of this project will enable Australian companies to produce and export specialised, high-performance composite products.Read moreRead less
Developing novel two-dimensional hybrid nanostructures for renewable energy. This project aims to develop novel two-dimensional (2D) hybrid nanostructures with new physical and chemical properties. This innovation intends to address the critical challenges of control functionalisation of 2D hybrid nanostructures: essential to understanding the potential of nanomaterials in key applications of energy generation. Expected outcomes include scalable technology to produce functional 2D nanomaterials ....Developing novel two-dimensional hybrid nanostructures for renewable energy. This project aims to develop novel two-dimensional (2D) hybrid nanostructures with new physical and chemical properties. This innovation intends to address the critical challenges of control functionalisation of 2D hybrid nanostructures: essential to understanding the potential of nanomaterials in key applications of energy generation. Expected outcomes include scalable technology to produce functional 2D nanomaterials and hybrid nanostructures to accelerate research to advanced materials and frontier material manufacturing technologies. This project will provide significant social and economic benefits to Australia in the growth of sectors in advanced materials, energy generation, and advanced manufacturing.Read moreRead less
Mitigating hydrogen embrittlement in high-strength steels. Hydrogen wreaks havoc in many alloys, leading to embrittlement that can cause catastrophic failure. This is a very serious issue for any industry in which structures are exposed to hydrogen and is a limiting factor for the production, transport, storage and use of hydrogen in a potential hydrogen economy. However, understanding the behaviour of hydrogen in alloys is restricted by the difficulty of observing it. In this project we will ob ....Mitigating hydrogen embrittlement in high-strength steels. Hydrogen wreaks havoc in many alloys, leading to embrittlement that can cause catastrophic failure. This is a very serious issue for any industry in which structures are exposed to hydrogen and is a limiting factor for the production, transport, storage and use of hydrogen in a potential hydrogen economy. However, understanding the behaviour of hydrogen in alloys is restricted by the difficulty of observing it. In this project we will obtain accurate 3D maps showing the position of hydrogen atoms in steel by combining deuteration with cryogenic atom probe microscopy. In this way we will will elucidate how a proposed solution, hydrogen trapping, reduces hydrogen embrittlement, contributing to design criteria for hydrogen-resistant steels.Read moreRead less
Advanced hard metals: microstructure-property-processing relationships. Our aim is to understand the origins of the properties of tungsten-carbide cobalt based hard metals and how these may be tuned via alloying and processing. This is significant because hard metals are used in industrial-scale turning, milling and drilling processes to cut other materials into finished parts with precise tolerance and surface finish. The expected outcomes are increased competitiveness of Australia's aerospace, ....Advanced hard metals: microstructure-property-processing relationships. Our aim is to understand the origins of the properties of tungsten-carbide cobalt based hard metals and how these may be tuned via alloying and processing. This is significant because hard metals are used in industrial-scale turning, milling and drilling processes to cut other materials into finished parts with precise tolerance and surface finish. The expected outcomes are increased competitiveness of Australia's aerospace, agriculture, biomedical, construction, defence, mechatronics, mining, and oil and gas industries, which depend on this materials technology. The benefits will be the creation of leading expertise in advanced manufacturing, support of end-user industries and the establishment of a regional R&D focal point in hard metals.Read moreRead less
Real-time imaging of crystal strengthening mechanisms in metals. The strength limit of a metal is marked by rapid motion of crystalline defects. The associated speeds can locally approach that of sound. To probe the associated mechanisms clearly requires both spatial and temporal resolution. We propose to create a new bulk x-ray technique with an unprecedented combination of temporal and spatial resolution. We plan to exploit the technique to mediate a step change in modelling strength based on ....Real-time imaging of crystal strengthening mechanisms in metals. The strength limit of a metal is marked by rapid motion of crystalline defects. The associated speeds can locally approach that of sound. To probe the associated mechanisms clearly requires both spatial and temporal resolution. We propose to create a new bulk x-ray technique with an unprecedented combination of temporal and spatial resolution. We plan to exploit the technique to mediate a step change in modelling strength based on twinning. The formation of crystalline twins is known to dictate the strength of the light metal magnesium. A fuller understanding of the effect of twinning on strength in this metal will provide much needed confidence to implement it more widely in energy saving applications.Read moreRead less
Experimental mapping of electron densities in nano-structured materials. This project aims to map electrons in nano-structured materials using a new technique combining the latest solid-state theory with electron scattering experiments in one of the world’s most advanced electron microscopes. It is expected that by revealing the electronic structure of nano-scale features in bulk materials for the first time, their functions will become fully explainable. Aside from this new capability, other ....Experimental mapping of electron densities in nano-structured materials. This project aims to map electrons in nano-structured materials using a new technique combining the latest solid-state theory with electron scattering experiments in one of the world’s most advanced electron microscopes. It is expected that by revealing the electronic structure of nano-scale features in bulk materials for the first time, their functions will become fully explainable. Aside from this new capability, other expected outcomes include discovering how heat is converted into electricity in thermoelectric materials and how precipitates affect alloy strength. The benefits may include more informed materials design, more efficient thermoelectrics for sustainable energy technologies, and higher strength-to-weight ratio alloys.Read moreRead less