Grain-boundary sliding in high-temperature ceramics: mechanical spectroscopy of high-purity magnesium oxide. The demise of elastic behaviour in materials stressed at sufficiently high temperature limits the usefulness of ceramics for structural applications, and is also responsible for reduced wave speeds and associated attenuation of seismic waves in the Earth's interior. Yet the nature of the transition in fine-grained materials tested at high temperature from elastic through anelastic to vis ....Grain-boundary sliding in high-temperature ceramics: mechanical spectroscopy of high-purity magnesium oxide. The demise of elastic behaviour in materials stressed at sufficiently high temperature limits the usefulness of ceramics for structural applications, and is also responsible for reduced wave speeds and associated attenuation of seismic waves in the Earth's interior. Yet the nature of the transition in fine-grained materials tested at high temperature from elastic through anelastic to viscous rheology remains poorly understood. Through a combination of mechanical testing by torsional forced oscillation/ microcreep methods of carefully fabricated and characterised specimens of polycrystalline MgO and associated micro-mechanical modelling we seek to clarify this fundamental and general aspect of high-temperature mechanical behaviour.Read moreRead less
Seismic wavespeeds and attenuation in upper-mantle rocks: a laboratory study of the effect of partial melting. The influence of partial melting on the seismic properties of the Earth's upper mantle will be explored through a laboratory study. Synthetic rock specimens consisting of the upper-mantle mineral olivine and a small proportion of basaltic magma will be prepared and their grain-scale melt distribution will be characterised. The seismic properties of these materials will be measured at ....Seismic wavespeeds and attenuation in upper-mantle rocks: a laboratory study of the effect of partial melting. The influence of partial melting on the seismic properties of the Earth's upper mantle will be explored through a laboratory study. Synthetic rock specimens consisting of the upper-mantle mineral olivine and a small proportion of basaltic magma will be prepared and their grain-scale melt distribution will be characterised. The seismic properties of these materials will be measured at high temperatures and seismic frequencies with novel locally developed equipment. Comparison with melt-free equivalents will allow the influence of the added magma to be quantified, allowing robust interpretation of seismological models of Earth structure with implications for its chemical and dynamical evolution.Read moreRead less
The Role of Hydrous Fluids in Fault Processes: An Experimental Study. The proposed project seeks to understand how hydrothermal reactions in fault zones affect various physical properties such as fault strength and permeability. The project will be conducted by performing high pressure experiments which simulate natural conditions. I will also develop new analytical techniques to characterize the microstructural evolution of faults, with a focus on understanding how any changes alter the hydrolo ....The Role of Hydrous Fluids in Fault Processes: An Experimental Study. The proposed project seeks to understand how hydrothermal reactions in fault zones affect various physical properties such as fault strength and permeability. The project will be conducted by performing high pressure experiments which simulate natural conditions. I will also develop new analytical techniques to characterize the microstructural evolution of faults, with a focus on understanding how any changes alter the hydrologic behaviour of the fault. This study will shed much needed information related to the mechanisms of earthquake nucleation, and to the formation mechanism of fault-hosted gold deposits.Read moreRead less
GRANULAR MATERIALS IN 3D: Structural, mechanical and dynamic properties from the grain-scale and beyond. Granular materials are the most abundant class of materials processed, stored or handled. They span from cereals to advanced-new-materials and, although simple in composition, their behaviour remains elusive. Through the unique combination of an advanced X-ray tomography facility and cutting-edge 3D network analysis and statistical mechanics approach, the structure, mechanics and dynamic be ....GRANULAR MATERIALS IN 3D: Structural, mechanical and dynamic properties from the grain-scale and beyond. Granular materials are the most abundant class of materials processed, stored or handled. They span from cereals to advanced-new-materials and, although simple in composition, their behaviour remains elusive. Through the unique combination of an advanced X-ray tomography facility and cutting-edge 3D network analysis and statistical mechanics approach, the structure, mechanics and dynamic behaviour of these systems will be explored at the grain-scale.
A greater understanding of this class of materials, which ranks second only to water on the scale of priorities of human activity, will have strong scientific, technological and economical impact in a wide range of fields from concrete to photonic-materials.Read moreRead less
Understanding nanostructure in lead-containing piezoceramics - the key to improved and environmentally-friendly materials. Lead-containing piezoelectric ceramics form the basis of multi-billion dollar industries, posing an increasingly serious environmental threat due to the toxicity of lead. By obtaining a detailed understanding of how their properties arise from their nanoscale structure and chemistry, our research will lead to improvements in existing materials and aid the quest for environme ....Understanding nanostructure in lead-containing piezoceramics - the key to improved and environmentally-friendly materials. Lead-containing piezoelectric ceramics form the basis of multi-billion dollar industries, posing an increasingly serious environmental threat due to the toxicity of lead. By obtaining a detailed understanding of how their properties arise from their nanoscale structure and chemistry, our research will lead to improvements in existing materials and aid the quest for environmentally-friendly alternatives. We will use a methodology for the elucidation of local structure and dynamics in which we are world leaders. The project will further enhance our standing in the field, provide excellent research training for students and early-career researchers and highlight the power and potential of Australia's new Synchrotron and OPAL research reactor.Read moreRead less
Nanoscale heating towards high efficient nitrogen reduction reduction. This project aims to develop nanoscale heating technique using AC magnetic field for efficient synthesis of ammonia, widely used for fertiliser and having potential for hydrogen storage. This project is to introduce nanoscale heating concept by heating catalyst only but not solution in electrochemical catalysis to achieve high catalytic activity. Expected outcome is the creation of low cost catalysts having high selectivity a ....Nanoscale heating towards high efficient nitrogen reduction reduction. This project aims to develop nanoscale heating technique using AC magnetic field for efficient synthesis of ammonia, widely used for fertiliser and having potential for hydrogen storage. This project is to introduce nanoscale heating concept by heating catalyst only but not solution in electrochemical catalysis to achieve high catalytic activity. Expected outcome is the creation of low cost catalysts having high selectivity and formation rate for ammonia production. This unique technology has the potential to replace current ammonia production based on Haber-Bosch process, which consumes 2% of world energy and contributes 3% of overall CO2 emission. The project provides opportunities for new industries that will benefit Australian economy.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100195
Funder
Australian Research Council
Funding Amount
$1,000,000.00
Summary
Field-emission gun transmission electron microscope for the research in nanomaterials, metal alloys and biological sciences. The proposed facility is required by a large range of world-leading research programs in light metals, nanomaterials, fibres and biomaterials. These research programs are strongly supported by automobile, textile, mineral and advanced materials industries that have important roles in the current national economy and local communities. The facility will improve significan ....Field-emission gun transmission electron microscope for the research in nanomaterials, metal alloys and biological sciences. The proposed facility is required by a large range of world-leading research programs in light metals, nanomaterials, fibres and biomaterials. These research programs are strongly supported by automobile, textile, mineral and advanced materials industries that have important roles in the current national economy and local communities. The facility will improve significantly our current research ability and help the creation of new research areas in nanotechnology and energy materials beneficial to clean energy, environmental protections and health care. It is also important equipment for new research student training.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE240100130
Funder
Australian Research Council
Funding Amount
$1,300,000.00
Summary
Thermophysical Property Analysers for Materials under Extreme Environments. The development of new materials with properties specifically tailored to withstand the extreme environments begins with understanding the physical nature of the processes involved, including the properties of atoms and molecules extending from the nanoscale to the collective behaviour at the macroscale. This relies on the knowledge achieved with new capabilities of analytical tools to open new avenues for developing the ....Thermophysical Property Analysers for Materials under Extreme Environments. The development of new materials with properties specifically tailored to withstand the extreme environments begins with understanding the physical nature of the processes involved, including the properties of atoms and molecules extending from the nanoscale to the collective behaviour at the macroscale. This relies on the knowledge achieved with new capabilities of analytical tools to open new avenues for developing the materials. This project aims to strengthen Australian research activities in the development of advanced materials for energy, defence and space, and advanced manufacturing technologies through establishing a high temperature, high pressure and high force materials characterisation suite for extreme environments at UNSW.Read moreRead less
A high performance and environment-friendly piezoelectric detector platform for biosensor applications. The development of high performance, lead-free, piezoelectric films and their incorporation into devices is rapidly becoming an urgent task as a result of recent legislation banning the use of lead in electronic components. The successful development of piezoelectric biosensors, as proposed in this project, has numerous potential benefits including the prospect of rapid and cheap biosensor dev ....A high performance and environment-friendly piezoelectric detector platform for biosensor applications. The development of high performance, lead-free, piezoelectric films and their incorporation into devices is rapidly becoming an urgent task as a result of recent legislation banning the use of lead in electronic components. The successful development of piezoelectric biosensors, as proposed in this project, has numerous potential benefits including the prospect of rapid and cheap biosensor devices as well as an environment-friendly, sensitive and real time solution for on-site drug, chemical and biological sensing. Successful development of the latter would provide immediate benefit in the areas of national security, food safety as well as in environmental and health monitoring. Read moreRead less
Tailoring the microwave dielectric properties of promising electroceramics for use in wireless telecommunication components and devices. This project aims to develop and tailor the microwave dielectric properties of promising electroceramic materials specifically targeting next generation wireless telecommunications applications. The partnership between the ANU and the Australian company Microwave and Materials Designs has the potential to enable new microwave electroceramic materials to be disc ....Tailoring the microwave dielectric properties of promising electroceramics for use in wireless telecommunication components and devices. This project aims to develop and tailor the microwave dielectric properties of promising electroceramic materials specifically targeting next generation wireless telecommunications applications. The partnership between the ANU and the Australian company Microwave and Materials Designs has the potential to enable new microwave electroceramic materials to be discovered and then incorporated into new microwave components and/or devices developed in response to the requirements of the international wireless telecommunications market. The requested PhD student will gain experience in both the industrial and academic worlds and the skills needed to be part of Australia's high-tech workforce. Read moreRead less