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A Novel Approach to the Development of Highly-Advanced Materials |
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A New Family of Ceramics via Hyper-Organized Structure Controlling |
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| Grains, interfacial phases, boundaries and other structural elements constituting a given material, possess specific sizes and morphologies that allow them to be classified into four scale levels: atomic- or molecular-scale, nano-, micro- and macro-scales. Conventionally, structural controlling has been confined to a singular scale level with improvements of one specific property in detriment of others. This research project attempts to achieve, through simultaneous control of structural elements at diverse scale levels, not only the compatibility of improved mechanical and thermal properties but the integration of diverse chemical and electrical functions into the same material. | 
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Superpiastic Deformation of Ceramic Superconductors and Improvement of Critical Current Density |
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| For the practical application of polycrystalline ceramic super-conductors, there are some difficult problems such as (1) poor machinability due to brittleness of the material and (2) low level of critical current density due to weak-link coupling among the grains. Systematic research has been carried out on superplastic deformation of fine-grained dense bodies based on chemical preparation of ultrafine powder and HIP sintering. Microstructural developments such as grain orientation, unidirectional grain growth and addition of pinning centers, and microscopic evaluation of grain boundary are in progress to improve critical current density. Polycrystalline bulk supercon-ductors are expected to be used for power lead, magnetic shield, current limiter and so on. | 
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Study of Fundamental Processes of Cluster and Ultrafine Particle Deposition on Solid Surfaces |
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| The objective of the research in our laboratory is to develop materials with new functions that originate from the properties of atomic (molecular) clusters and ultrafine particles. The elements that will be studied are those in the IV, V, and VI groups in the periodic table. Novel properties of the clusters and the ultrafine particles are searched, and methods of depositing them on solid surfaces to form new materials will be investigated. | 
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