cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb1920637-1
title: Lattice Strain Evolution During Monotonic and Cyclic Loading of 316L Stainless Steel Samples Manufactured by Selective Laser Melting

description: Selective laser melting (SLM) is a relatively new additive manufacturing process enabling complex shaped components to be manufactured that may not have previously been possible. The process involves sequential melting and solidification of metal powders until the part is built. The process generates a material with a complex micro structure which behaves very differently from conventionally manufactured materials when loaded. The deformation and failure behaviour of SLM materiel needs to be understood so that it can be predicted. This experiment will use neutron diffraction to understand the internal strain state in SLM material and how it evolves during elastic and plastic deformation in both monotonic and cyclic (tension and compression) loading conditions. The results will be used to and develop predictive micro-scale models of deformation in SLM materials of 316L steel.
DOI: 10.5286/isis.e.rb2000036
title: VALIDATION OF EFFICIENT DUPLICATION WITH COMPARISON STRATEGIES IN GRAPHICS PROCESSING UNITS AND EMBEDDED SYSTEMS

description: The goal of this proposal is to continue our evaluation of the resilience of modern parallel devices that include computing cores of different precision. Our idea is to use the idle lower precision cores to implement a fast and effective duplication. We will study the neutron sensitivity of modern System on Chips embedding ARM core, Graphics Processing Units, and multi-core processors. During our experiments we will run various algorithm including object-detection frameworks for automotive applications implementing the hardening solutions we have developed based on previous experiments results.
DOI: 10.5286/isis.e.rb1820525-2
title: Investigation of the relaxor-photoferroelectric Ba(Sn,Ti)O3 compounds using neutron pair distribution function

description: The local structural distortions in BaTiO3-based solid solutions, where the Ti4+ site is substituted by isovalent Sn4+ cation Ba(Sn,Ti)O3, are characterized by no oxygen tilts and predicted to promote different Ti(Sn)-O bonds leading to different polar orders through the phase diagram, from ferroelectrics to relaxors. The last ones are characterized by the presence of polar nanoclusters with different dynamic regimes depending on the Ti/Sn ratio. We carried out atomistic calculations indicating a distribution of Ti(Sn)-O bond distances for relaxor compositions, which is compatible with a local induced polarization on the Sn sites from the Ti ones. Neutron scattering pair distribution function on different compositions and at room and low temperature will allow us quantifying the local disorder on these compounds above and below the activation temperature of the polar nanoclusters.
DOI: 10.5286/isis.e.rb1920476-2
title: Do defect structures in the pyrochlore Tb2Ti2O7 control hidden order or the thermal Hall effect?

description: The rare earth pyrochlores have been at the forefront of research into exotic magnetic phenomena for some years. In general they are of interest because they are frustrated - the interactions between magnetic moments in this crystal structure cannot be completely satisfied leading to unusual states with large degeneracies or fluctuations. These states are often fragile, as the persistence of such degeneracies to very low temperatures is unfavourable thermodynamically, and so they are sensitive to very tiny levels of disorder in the crystal structure that perturb the competing interactions. Tb2Ti2O7 has various low temperature states, and a very exotic thermal Hall effect, which may depend on the type and concentration of defects. Using SXD, we will compare crystals with more or less possible disorder to examine its role in the low temperature state and thermal Hall effect.
DOI: 10.5286/isis.e.rb1920610
title: Structural characterization of a new multicomponent membrane (gCN/PTI mixed with Nafion) for energy applications.

description: Proton exchange membranes are essential components of devices where is required to transport H+ while blocking the flow of other ions and molecules used as reactants. The most common ionomeric material is Nafion, which has excellent H+ conductivity, despite having poor selectivity against other ions and small molecules. It is been found that introducing ~1% gCN (graphitic carbon nitrides) into Nafion/SPEEK membranes enhances H+ conduction. We propose to use neutron scattering to investigate the effects of gCN materials co-deposited with Nafion on the membrane structure that will be correlate with the transport properties. Our studies will provide a first direct evaluation of the effects of GO and gCN/PTI 2D nanomaterials incorporated in ionomer membrane structures for fuel cell and other energy conversion/storage applications.
DOI: 10.5286/isis.e.rb1920610-1
title: Structural characterization of a new multicomponent membrane (gCN/PTI mixed with Nafion) for energy applications.

description: Proton exchange membranes are essential components of devices where is required to transport H+ while blocking the flow of other ions and molecules used as reactants. The most common ionomeric material is Nafion, which has excellent H+ conductivity, despite having poor selectivity against other ions and small molecules. It is been found that introducing ~1% gCN (graphitic carbon nitrides) into Nafion/SPEEK membranes enhances H+ conduction. We propose to use neutron scattering to investigate the effects of gCN materials co-deposited with Nafion on the membrane structure that will be correlate with the transport properties. Our studies will provide a first direct evaluation of the effects of GO and gCN/PTI 2D nanomaterials incorporated in ionomer membrane structures for fuel cell and other energy conversion/storage applications.
DOI: 10.5286/isis.e.rb2000034
title: Structure-property relationships in new oxide ion conductor Ba3NbWO8.5

description: Oxide ion conductors have been a focus of intense research due to their application as electrolytes in solid oxide fuel cells. The currently used materials (yttria-stabilised zirconia) require 800-1000°C to operate efficiently. New oxide materials are sought as electrolytes with high conductivity between 450 and 600°C. Ba3NbWO8.5 has high oxide ion conductivity in this range. It was first described as a new hybrid of the 9R perovskite and the palmierite structure. We have grown high-quality crystals and have shown that the true structure is more complex, with extensive disorder in both the cation and anion sublattices. Lab single crystal XRD was not sufficient to characterise fully the oxide ion sublattice, and neutron diffraction is necessary to provide this understanding, essential for determining the structure-property relationships in this exciting new family of solid electrolytes.
DOI: 10.5286/isis.e.rb2000034-1
title: Structure-property relationships in new oxide ion conductor Ba3NbWO8.5

description: Oxide ion conductors have been a focus of intense research due to their application as electrolytes in solid oxide fuel cells. The currently used materials (yttria-stabilised zirconia) require 800-1000°C to operate efficiently. New oxide materials are sought as electrolytes with high conductivity between 450 and 600°C. Ba3NbWO8.5 has high oxide ion conductivity in this range. It was first described as a new hybrid of the 9R perovskite and the palmierite structure. We have grown high-quality crystals and have shown that the true structure is more complex, with extensive disorder in both the cation and anion sublattices. Lab single crystal XRD was not sufficient to characterise fully the oxide ion sublattice, and neutron diffraction is necessary to provide this understanding, essential for determining the structure-property relationships in this exciting new family of solid electrolytes.
DOI: 10.5286/isis.e.rb2000036-1
title: VALIDATION OF EFFICIENT DUPLICATION WITH COMPARISON STRATEGIES IN GRAPHICS PROCESSING UNITS AND EMBEDDED SYSTEMS

description: The goal of this proposal is to continue our evaluation of the resilience of modern parallel devices that include computing cores of different precision. Our idea is to use the idle lower precision cores to implement a fast and effective duplication. We will study the neutron sensitivity of modern System on Chips embedding ARM core, Graphics Processing Units, and multi-core processors. During our experiments we will run various algorithm including object-detection frameworks for automotive applications implementing the hardening solutions we have developed based on previous experiments results.
DOI: 10.5286/isis.e.rb2000036-2
title: VALIDATION OF EFFICIENT DUPLICATION WITH COMPARISON STRATEGIES IN GRAPHICS PROCESSING UNITS AND EMBEDDED SYSTEMS

description: The goal of this proposal is to continue our evaluation of the resilience of modern parallel devices that include computing cores of different precision. Our idea is to use the idle lower precision cores to implement a fast and effective duplication. We will study the neutron sensitivity of modern System on Chips embedding ARM core, Graphics Processing Units, and multi-core processors. During our experiments we will run various algorithm including object-detection frameworks for automotive applications implementing the hardening solutions we have developed based on previous experiments results.
DOI: 10.5286/isis.e.rb1920313-1
title: Spin flop in antiferromagnetic CuMnAs

description: CuMnAs has emerged as a testbed system for studying the interaction between spin-orbit coupled charge carriers and antiferromagnetic order, with potential applications in high-frequency memory and logic devices. Here we propose a neutron diffraction study which aims to firmly establish the relationship between the electrical conductivity and the magnetic order in CuMnAs, by using an external magnetic field to reorient the antiferromagnetically coupled spins. Studies of samples with well-characterized magnetic domain structures will shed new light on the spin reorientation processes in this important class of antiferromagnetic materials.
DOI: 10.5286/isis.e.rb1920438
title: Multi-scale characterisation of residual stress in laser welded EUROFER97 using neutron diffraction and PFIB-DIC methods

description: To facilitate Remote Maintenance (RM) of demonstration fusion plant, the RM teams at Culham Centre for Fusion Energy (CCFE) utilise lasers to join EUROFER97 components. Understanding the residual stresses inherited from the rapid welding process, and how this stresses evolve at elevated temperature, plays a pivotal role in avoiding catastrophic failure regarding the structural integrity of fusion power plant. The current proposed study aims to (i) characterise both micro and macro residual stress in laser welded EURFOER97 (ii) investigate the effect of annealing duration on residual stress relaxation to guide the post weld heat treatment processing. The correlation of residual stresses with microstructure and mechanical properties of welded EUORFER97 will be also preformed. This project is funded by Surrey Doctoral College Studentship in collaboration with CCFE.
DOI: 10.5286/isis.e.rb1920438-1
title: Multi-scale characterisation of residual stress in laser welded EUROFER97 using neutron diffraction and PFIB-DIC methods

description: To facilitate Remote Maintenance (RM) of demonstration fusion plant, the RM teams at Culham Centre for Fusion Energy (CCFE) utilise lasers to join EUROFER97 components. Understanding the residual stresses inherited from the rapid welding process, and how this stresses evolve at elevated temperature, plays a pivotal role in avoiding catastrophic failure regarding the structural integrity of fusion power plant. The current proposed study aims to (i) characterise both micro and macro residual stress in laser welded EURFOER97 (ii) investigate the effect of annealing duration on residual stress relaxation to guide the post weld heat treatment processing. The correlation of residual stresses with microstructure and mechanical properties of welded EUORFER97 will be also preformed. This project is funded by Surrey Doctoral College Studentship in collaboration with CCFE.
DOI: 10.5286/isis.e.rb1920450
title: SANS to Monitor the Accessibility of Electrolytes into Aqueous Based Supercapacitor Electrodes

description: Supercapacitors are devices capable of absorbing and delivering large amounts of energy over short time-scales. They are ideal for high-power/low-energy applications such as automotive acceleration and braking. In an attempt to reduce costs and improve safety we are developing a new generation of aqueous supercapacitors made from polymer-derived carbons loaded with N and S and porosity optimised to improve performance. One major challenge is to decouple pseudocapacitance associated with the heteroatoms from double layer capacitance from electrolyte in the porosity. To optimise performance we need to understand the ingress of electrolyte into the porosity: Contrast-Matching SANS can measure this and we will use D2O to decouple open from inaccessible porosity our new carbons. This will help us develop a new class of supercapacitor electrode material.
DOI: 10.5286/isis.e.rb1920450-1
title: SANS to Monitor the Accessibility of Electrolytes into Aqueous Based Supercapacitor Electrodes

description: Supercapacitors are devices capable of absorbing and delivering large amounts of energy over short time-scales. They are ideal for high-power/low-energy applications such as automotive acceleration and braking. In an attempt to reduce costs and improve safety we are developing a new generation of aqueous supercapacitors made from polymer-derived carbons loaded with N and S and porosity optimised to improve performance. One major challenge is to decouple pseudocapacitance associated with the heteroatoms from double layer capacitance from electrolyte in the porosity. To optimise performance we need to understand the ingress of electrolyte into the porosity: Contrast-Matching SANS can measure this and we will use D2O to decouple open from inaccessible porosity our new carbons. This will help us develop a new class of supercapacitor electrode material.
DOI: 10.5286/isis.e.rb1920572-2
title: Quasi-Elastic Neutron Scattering on adenine-based gold(I) hydrogel-entangled water molecules

description: The hydrogelation of gold(I) complexes is a fascinating albeit still underdeveloped area of soft matter chemistry, with feasible high-technology applications based on the unique properties of this metal. Although the scarce number of reported examples so far has been thoroughly studied by a wide plethora of techniques, there is a general lack of information on how water molecules assist the formation of the supramolecular hydrogelating motifs (which are commonly fibers). Herein, we propose the in-depth study of the dynamical behaviour of water and the hydrogel matrix in three of adenine-based gold(I) low molecular weight hydrometallogelators, by quasi-elastic neutron scattering (QENS).
DOI: 10.5286/isis.e.rb1710063-2
title: Chain Shape of High Mobility Conjugated Polymers in Dilute Solution Using Small Angle Neutron Scattering

description: Conjugated polymers have attracted great interest in electronic applications. The aim of the proposal is to use small angle neutron scattering to study the chain shape statistics of high mobility conjugated polymers with cutting-edge electronic performance. Chain shape information including the persistent length and characteristic ratio will tell about the stiffness of the polymer chain. It will provide basic information of these interesting polymers. The experimental result will also provide opportunities to find a link between chain stiffness and charge transport in these polymers.
DOI: 10.5286/isis.e.rb1920007
title: Investigating the Structure of the Fe-BTC MOF

description: Metalorganic frameworks (MOFs) are highly porous 3D materials, composed of metal clusters connected via organic linkers. Crystallinity is believed to be a prerequisite for gas separation and storage, drug delivery, catalysis and sensing applications. Amorphous MOFs possess the same chemical composition and local connectivity, though are almost completely ignored in the literature. MIL-100(Fe) exists in both amorphous and crystalline forms. The amorphous version is commercially available and outperforms the crystalline, though the structure is unknown.Neutron total scattering data will be collected, and combined with existing synchrotron X-ray data. This will allow us to produce atomistic models. We will use these to rationalise performance in this case, and, more generally, provide the first example of a relatively complex amorphous MOF system, that comes from outside the ZIF family.
DOI: 10.5286/isis.e.rb1920007-1
title: Investigating the Structure of the Fe-BTC MOF

description: Metalorganic frameworks (MOFs) are highly porous 3D materials, composed of metal clusters connected via organic linkers. Crystallinity is believed to be a prerequisite for gas separation and storage, drug delivery, catalysis and sensing applications. Amorphous MOFs possess the same chemical composition and local connectivity, though are almost completely ignored in the literature. MIL-100(Fe) exists in both amorphous and crystalline forms. The amorphous version is commercially available and outperforms the crystalline, though the structure is unknown.Neutron total scattering data will be collected, and combined with existing synchrotron X-ray data. This will allow us to produce atomistic models. We will use these to rationalise performance in this case, and, more generally, provide the first example of a relatively complex amorphous MOF system, that comes from outside the ZIF family.
DOI: 10.5286/isis.e.rb1920582-2
title: Magnetic Exciations in single crystalline Erbium Iron Garnet

description: Erbium iron garnet is a technologically important material with potential use in quantum computing. The predicted presence of a magnetic resonance and an optically active erbium ion transitions points to its possible use coupling a short-range electromagnetic superconducting quantum-bit control system and a long-range fiber-optic communication system. This could relax some of the size constraints on quantum computers thereby increasing the number of addressable quantum-bits available to a single computer. Erbium iron garnet has a ferrimagnetic ground state which has been studied extensively. Its magnetic excitations, however, remain largely unexplored. This proposed measurement of the magnetic excitations of erbium iron garnet will determine its magnetic interactions, which will provide crucial constraints for anyone hoping to exploit its properties for quantum computing.
DOI: 10.5286/isis.e.rb2000041
title: Variable temperature crystallography on new fast Li ion conductors

description: We hope to utilise variable temperature neutron diffraction to understand the structural chemistry in two new Li-rich ionic conductors and relate them to known families of fast ion conductors. Activation barriers associated with bulk ionic transport are determined by the coordination environments local to the Li ions and the pathways that exist between them; accurate structural characterisation is therefore needed to understand the transport mechanisms. This is possible only through analysis of neutron powder diffraction due to the weak X-ray scattering of lithium. We will locate the lithium positions in these materials and understand the extent of order/disorder which is key to ionic transport. Samples are ready to be measured and have been characterised using synchrotron X-ray diffraction (I11), measurement of thermal behaviour, composition and ionic conducting properties.
DOI: 10.5286/isis.e.rb2000041-1
title: Variable temperature crystallography on new fast Li ion conductors

description: We hope to utilise variable temperature neutron diffraction to understand the structural chemistry in two new Li-rich ionic conductors and relate them to known families of fast ion conductors. Activation barriers associated with bulk ionic transport are determined by the coordination environments local to the Li ions and the pathways that exist between them; accurate structural characterisation is therefore needed to understand the transport mechanisms. This is possible only through analysis of neutron powder diffraction due to the weak X-ray scattering of lithium. We will locate the lithium positions in these materials and understand the extent of order/disorder which is key to ionic transport. Samples are ready to be measured and have been characterised using synchrotron X-ray diffraction (I11), measurement of thermal behaviour, composition and ionic conducting properties.
DOI: 10.5286/isis.e.rb2000043
title: Measuring Radiation Effects on Embedded Devices and Sensors

description: Performance degradation analysis of the sensors and embedded computing systems in the radiation-rich environment is a research area for nuclear robotics. In this perspective, a couple of experiments are proposed to capture the neutron-induced noise on the Raspberry Pi camera, Kinect camera, and ZYNQ FPGA. The experiments are designed to maintain a log of the data from the irradiated devices to a wide neutron fluence range. The captured data will be useful in modelling the device under test (DUT) performance degradation as the function of the neutron fluence. Such models can be useful for researchers planning similar deployments and for algorithms facilitating radiation robust operation. The degradation analysis requires periodic irradiation of the DUT from a high flux collimated neutron beam, and a 48-hour beamtime at the ChipIR facility is ideal to support the said need.
DOI: 10.5286/isis.e.rb2000043-1
title: Measuring Radiation Effects on Embedded Devices and Sensors

description: Performance degradation analysis of the sensors and embedded computing systems in the radiation-rich environment is a research area for nuclear robotics. In this perspective, a couple of experiments are proposed to capture the neutron-induced noise on the Raspberry Pi camera, Kinect camera, and ZYNQ FPGA. The experiments are designed to maintain a log of the data from the irradiated devices to a wide neutron fluence range. The captured data will be useful in modelling the device under test (DUT) performance degradation as the function of the neutron fluence. Such models can be useful for researchers planning similar deployments and for algorithms facilitating radiation robust operation. The degradation analysis requires periodic irradiation of the DUT from a high flux collimated neutron beam, and a 48-hour beamtime at the ChipIR facility is ideal to support the said need.