The conditions in which materials are required to operate are becoming ever more challenging. Operating temperatures and pressures are increasing in all areas of manufacture, energy generation, transport and environmental clean-up. Often the high temperatures are combined with severe chemical environments and exposure to high energy and, in the nuclear industry, to ionising radiation. The production and processing of next-generation materials capable of operating in these conditions will be non-trivial, especially at the scale required in many of these applications. In some cases, totally new compositions, processing and joining strategies will have to be developed. The need for long-term reliability in many components means that defects introduced during processing will need to be kept to an absolute minimum or defect-tolerant systems developed, e.g. via fibre reinforcement. Modelling techniques that link different length and time scales to define the materials chemistry, microstructure and processing strategy are key to speeding up the development of these next-generation materials. Further, they will not function in isolation but as part of a system. It is the behaviour of the latter that is crucial, so that interactions between different materials, the joining processes, the behaviour of the different parts under extreme conditions and how they can be made to work together, must be understood. Our vision is to develop the required understanding of how the processing, microstructures and properties of materials systems operating in extreme environments interact to the point where materials with the required performance can be designed and then manufactured. Aligned with the Materials Genome Initiative in the USA, we will integrate hierarchical and predictive modelling capability in fields where experiments are extremely difficult and expensive. The team have significant experience of working in this area. Composites based on 'exotic' materials such as zirconium diborides and silicon carbide have been developed for use as leading edges for hypersonic vehicles over a 3 year, DSTL funded collaboration between the 3 universities associated with this proposal. World-leading achievements include densifying them in <10 mins using a relatively new technique known as spark plasma sintering (SPS); measuring their thermal and mechanical properties at up to 2000oC; assessing their oxidation performance at extremely high heat fluxes and producing fibre-reinforced systems that can withstand exceptionally high heating rates, e.g. 1000oC s-1, and temperatures of nearly 3000oC for several minutes. The research planned for this Programme Grant is designed to both spin off this knowledge into materials processing for nuclear fusion and fission, aerospace and other applications where radiation, oxidation and erosion resistance at very high temperatures are essential and to gain a deep understanding of the processing-microstructure-property relations of these materials and how they interact with each other by undertaking one of the most thorough assessments ever, allowing new and revolutionary compositions, microstructures and composite systems to be designed, manufactured and tested. A wide range of potential crystal chemistries will be considered to enable identification of operational mechanisms across a range of materials systems and to achieve paradigm changing developments. The Programme Grant would enable us to put in place the expertise required to produce a chain of knowledge from prediction and synthesis through to processing, characterisation and application that will enable the UK to be world leading in materials for harsh environments.

The conditions in which materials are required to operate are becoming ever more challenging. Operating temperatures and pressures are increasing in all areas of manufacture, energy generation, transport and environmental clean-up. Often the high temperatures are combined with severe chemical environments and exposure to high energy and, in the nuclear industry, to ionising radiation. The production and processing of next-generation materials capable of operating in these conditions will be non-trivial, especially at the scale required in many of these applications. In some cases, totally new compositions, processing and joining strategies will have to be developed. The need for long-term reliability in many components means that defects introduced during processing will need to be kept to an absolute minimum or defect-tolerant systems developed, e.g. via fibre reinforcement. Modelling techniques that link different length and time scales to define the materials chemistry, microstructure and processing strategy are key to speeding up the development of these next-generation materials. Further, they will not function in isolation but as part of a system. It is the behaviour of the latter that is crucial, so that interactions between different materials, the joining processes, the behaviour of the different parts under extreme conditions and how they can be made to work together, must be understood. Our vision is to develop the required understanding of how the processing, microstructures and properties of materials systems operating in extreme environments interact to the point where materials with the required performance can be designed and then manufactured. Aligned with the Materials Genome Initiative in the USA, we will integrate hierarchical and predictive modelling capability in fields where experiments are extremely difficult and expensive. The team have significant experience of working in this area. Composites based on 'exotic' materials such as zirconium diborides and silicon carbide have been developed for use as leading edges for hypersonic vehicles over a 3 year, DSTL funded collaboration between the 3 universities associated with this proposal. World-leading achievements include densifying them in <10 mins using a relatively new technique known as spark plasma sintering (SPS); measuring their thermal and mechanical properties at up to 2000oC; assessing their oxidation performance at extremely high heat fluxes and producing fibre-reinforced systems that can withstand exceptionally high heating rates, e.g. 1000oC s-1, and temperatures of nearly 3000oC for several minutes. The research planned for this Programme Grant is designed to both spin off this knowledge into materials processing for nuclear fusion and fission, aerospace and other applications where radiation, oxidation and erosion resistance at very high temperatures are essential and to gain a deep understanding of the processing-microstructure-property relations of these materials and how they interact with each other by undertaking one of the most thorough assessments ever, allowing new and revolutionary compositions, microstructures and composite systems to be designed, manufactured and tested. A wide range of potential crystal chemistries will be considered to enable identification of operational mechanisms across a range of materials systems and to achieve paradigm changing developments. The Programme Grant would enable us to put in place the expertise required to produce a chain of knowledge from prediction and synthesis through to processing, characterisation and application that will enable the UK to be world leading in materials for harsh environments.

We plan to create a world-leading, multidisciplinary, UK Structural Ceramics Centre to underpin research and development of these highly complex materials. Structural ceramics are surprisingly ubiquitous not only in obvious traditional applications (whitewares, gypsum plaster, house bricks, furnace refractories, dental porcelains and hip/knee prostheses) but in hidden applications where their electrical behaviour is also important such as in computers, mobile phones, DVDs etc. Structural ceramics are enabling materials which underpin many key areas of the economy including: energy generation, environmental clean-up, aerospace and defence, transport and healthcare. Key areas where important developments can be made in energy generation include ceramics for plutonium immobilisation and for next generation nuclear reactor fuels, for ion conductors in solid oxide fuel cells, and for storage of hydrogen for the projected hydrogen economy. Porous ceramics need to be developed for heavy metal and radionuclide capturing filters to help with environmental remediation of soil, air and water and for storage of carbon captured from burning fossil fuels. The next generation of space shuttles and other military aircraft will rely on ceramic and composite thermal protection systems operating at over 2000C. Ceramic coatings on turbine blades in aircraft enable them to function at temperatures above the melting point of the metals alloys from which they are mostly made, and improved ceramics capable of operation at even higher temperatures will confer improved fuel efficiency with environmental benefits. Our troops need improved personal body & vehicle armour to operate safely in troubled areas and the latest generation of armour materials will use ceramic laminate systems but improvements always need to be made in this field. Ceramic are used increasingly for bone and tooth replacement with the latest materials having the ability to allow natural bone ingrowth and with mechanical properties close to natural bone. It is clear the improved understanding of the mechanical behaviour of ceramics, better and simpler processing and the ability to model structure-processing-property relations over many length scales will lead to significant benefit not just to the UK but to mankind. Our aim is to combine the capabilities of two internationally-leading Departments at Imperial College London (Materials and Mechanical Engineering) to form the Centre of Excellence. The Centre will act as a focal point for UK research on structural ceramics but will encourage industrial and university partners to participate in UK and international R&D programmes. 51 companies and universities have already expressed the wish to be involved with promised in-kind support at over 900K. Research activities will be developed in three key areas: -Measurement of mechanical properties and their evolution in extreme environments such as high temperatures, demanding chemical environments, severe wear and impact conditions and combinations of these.-High Temperature Processing and Fabrication. In particular, there is a need for novel approaches for materials which are difficult to process such as borides, carbides, nitrides, materials with compositional gradients and ceramic matrix composites (CMCs). -Modelling of the time-dependence of deformation and fracture of ceramics to predict the useful lifetime of components. The modelling techniques will vary from treating the material as a homogeneous block down to describing the atomic nature of the materials and links between these approaches will be established.In addition to providing the funding that will enable us to create the nucleus from which the centre can grow, mutually beneficial relations with industry, universities and research centres in the UK and abroad will be developed to ensure that a large group of researchers will remain active long after the period for which funding is sought will have ended.