392 results found
Davoisne C, Lee WE, Stennett MC, et al., 2010, IRRADIATION EFFECTS IN CERAMICS FOR PLUTONIUM DISPOSITION, Materials Science and Technology 2009 Conference and Exhibition, Publisher: AMER CERAMIC SOC, Pages: 3-+, ISSN: 1042-1122
Jackson HF, Jayaseelan DD, Clegg WJ, et al., 2010, MICROSTRUCTURE OF LASER-MELTED ZIRCONIUM CARBIDE CERAMICS, Materials Science and Technology 2009 Conference and Exhibition, Publisher: AMER CERAMIC SOC, Pages: 113-+, ISSN: 1042-1122
Jackson HF, Daniel DJ, Clegg WJ, et al., 2010, LASER MELTING OF SPARK PLASMA SINTERED ZIRCONIUM CARBIDE: THERMOPHYSICAL PROPERTIES OF A GENERATION IV VERY HIGH TEMPERATURE REACTOR MATERIAL, 33rd International Conference on Advanced Ceramics and Composites, Publisher: AMER CERAMIC SOC, Pages: 161-+, ISSN: 0196-6219
Jackson HF, Jayaseelan D, Lee WE, et al., 2010, Laser Melting of Spark Plasma-Sintered ZirconiumCarbide: Thermophysical Properties of a Generation IVVery High-Temperature Reactor Material, International Journal of Applied Ceramic Technology, Pages: 1-11
Desimone D, Jayaseelan DD, Pang B, et al., 2009, Oxide fibre reinforced glass matrix composites with ZrO2 interfaces, Furnace Solutions 4 Conference 2009, Publisher: SOC GLASS TECHNOLOGY, Pages: 121-126, ISSN: 1753-3546
TBC, 2009, Committee on Radioactive Waste Management: REPORT TO GOVERNMENT, INTERIM STORAGE OF HIGHER ACTIVITY WASTES AND THE MANAGEMENT OF SPENT FUELS, PLUTONIUM AND URANIUM, UK, CoRWM Document 2500
This is one of three CoRWM reports to Government in 2009. The reports are about: interim storage of higher activity wastes (including waste conditioning, packaging and transport, and the management of materials that may be declared to be wastes) (this report) the implementation of geological disposal of higher activity wastes research and development for interim storage and geological disposal.The reports cover the three strands of the Government’s Managing Radioactive Waste Safely programme. They contain the results of CoRWM’s scrutiny, during 2008 and the first part of 2009, of the work of the Government, the Nuclear Decommissioning Authority, other nuclear industry organisations, the regulators, local authorities and various organisations that carry out research. The recommendations in the reports are to Government but also affect others.
Colombo P, Boccaccini AR, Lee WEB, 2009, Glasses and ceramics from waste, ADVANCES IN APPLIED CERAMICS, Vol: 108, Pages: 1-1, ISSN: 1743-6753
Pontikes Y, Rathossi C, Nikolopoulos P, et al., 2009, Effect of firing temperature and atmosphere on sintering of ceramics made from Bayer process bauxite residue, Ceramics International, Vol: 35, Pages: 401-407, ISSN: 0272-8842
Bauxite residue, the principal waste from the Bayer process, was dried, pressed and studied for its thermal and sintering behaviour under different atmospheres, up to 1100 degrees C. For sintering in air and N-2, shrinkage begins at 800 degrees C and ranges from 2.6% to 13.9%, after firing at 1000-1100 degrees C. Bulk density varies from 1.7 to 2.3 g/cm(3) whereas water absorption from 31.5% to 17.7%. The main crystalline phases identified on firing in air were hematite (Fe2O3), gehlenite (Ca2Al2SiO7) and perovskite (CaTiO3) whereas magnetite (Fe3O4) was also found on firing in N-2. Microstructures are characterised by irregularly shaped, <20 mu m Feret diameter, pores in a ceramic matrix with interconnected porosity. The average pore size is greater in samples fired in N-2. On sintering in 4%H-2/Ar, shrinkage begins at 710 degrees C. After firing at 1100 degrees C, shrinkage is 20.1% and water absorption 1%. The main crystalline phases are magnetite, wustite (FeO), gehlenite and perovskite. Mcrostructures are characterised by a compact heterogeneous matrix, with isolated <15 mu m. Feret diameter, closed pores. The grains have reacted with the adjacent phase and their shape is rounded with no sharp facets. Increased sintering temperature results in improved physical properties for all atmospheres tested and in higher average pore size when sintering takes place in air and N-2. The use of magnetite-reducing sintering conditions can potentially assist in the production of a variety of ceramic compositions containing bauxite residue. (C) 2008 Elsevier Ltd and Techna Group. S.r.l. All rights reserved.
Lee WE, Roberts JW, Hyatt NC, et al., 2008, Materials Research Society Symposium Proceedings - Scientific Basis for Nuclear Waste Management XXXI: Preface, Materials Research Society Symposium Proceedings, Vol: 1107, ISSN: 0272-9172
Tarvornpanich T, Souza GP, Lee WE, 2008, Microstructural evolution in clay-based ceramics I: Single components and binary mixtures of clay, flux, and quartz filler, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 91, Pages: 2264-2271, ISSN: 0002-7820
Tarvornpanich T, Souza GP, Lee WE, 2008, Microstructural evolution in clay-based ceramics II: Ternary and quaternary mixtures of clay, flux, and quartz filler, Journal of the American Ceramic Society, Vol: 91, Pages: 2272-2280, ISSN: 0002-7820
The complex microstructural evolution in mixtures of kaolinite clay, quartz, nepheline syenite, and soda-lime-silica (SLS) glass has been revisited. Detailed descriptions of reactions leading to dense whiteware bodies backed by semi-quantitative X-ray diffraction analysis reveal that ternary mixtures containing nepheline syenite differ from those containing SLS glass, as new crystalline phases develop inside and at the interfaces among SLS glass particles and decomposed clay and quartz. In SLS glass-fluxed mixtures, tridymite formation was hindered and cristobalite formed at ≥ 750°C followed by wollastonite at ≥ 8001C. Albite and plagioclase formed from interaction between clay and molten SLS glass above 800°C. Wollastonite was not present ≥ 1100°C, leaving only cristobalite in the surrounding regions. Quartz partially dissolves at temperatures ≥ 10001C after interacting with molten SLS glass. In quaternary mixtures containing 6.25 wt% SLS glass and 17.25 wt% nepheline syenite fluxes, formation of types II and III secondary mullite was more pronounced than in the fully SLS glass-fluxed mixture. The more fluid liquid from nepheline syenite enhances the growth kinetics of mullite. The body fired at the optimum firing temperature (1100°C) has a microstructure containing primary type I and secondary types II and III mullites, remnant cristobalite, plagioclase, and partially dissolved quartz embedded in the glassy phase. Providing a roadmap for microstructural design in clay-based systems may have significant commercial impact in the emerging technology of use of waste materials in clay-based ceramics. © 2008 The American Ceramic Society.
Juoi JM, Ojovan MI, Lee WE, 2008, Microstructure and leaching durability of glass composite wasteforms for spent clinoptilolite immobilisation, JOURNAL OF NUCLEAR MATERIALS, Vol: 372, Pages: 358-366, ISSN: 0022-3115
Li Z, Zhang S, Lee WE, 2008, Improving the hydration resistance of lime-based refractory materials, INTERNATIONAL MATERIALS REVIEWS, Vol: 53, Pages: 1-20, ISSN: 0950-6608
Lee WE, Souza GP, McConville CJ, et al., 2008, Mullite formation in clays and clay-derived vitreous ceramics, International Workshop Mullite 2006 in honor of Hartmut Schneider, Publisher: ELSEVIER SCI LTD, Pages: 465-471, ISSN: 0955-2219
Lee WE, Jayaseelan DD, Zhang S, 2008, Solid-liquid interactions: The key to microstructural evolution in ceramics, J. Europ. Ceram. Soc., Vol: 28, Pages: 1517-1525
Ojovan MI, Juoi JM, Boccaccini AR, et al., 2008, Glass Composite Materials for Nuclear and Hazardous Waste Immobilisation, PA, USA, MRS Scientific Basis for Nuclear Waste Management XXXI, Publisher: Materials Research Society
Glass composite materials (GCM) are versatile wasteforms for immobilising various typesof both radioactive and hazardous wastes. We review current research on the utilisation of GCMsfor hazardous and radioactive waste immobilisation. Compared to homogeneous glassy materialsGCMs can incorporate larger amounts of waste elements and, in the case of glass matrixcomposites, they can be produced using lower processing temperatures (by viscous flowsintering) than those of conventional melting.
de Sá RG, Lenz e Silva GFB, Bittencourt LRM, et al., 2007, Recycling of spent refractories from metallurgical processing: Management and technological approach, United European Refractories meet the World: UNITECR 2007 - Unified Int. Tech. Conf. on Refractories; 10th Biennial Worldwide Congress, Proc.; in conj. with the 50th Int. Colloquium on Refractories, Pages: 590-593
Ojovan MI, Lee WE, 2007, New Developments in Glassy Nuclear Wasteforms, New York, Publisher: Nova Publishers, ISBN: 9781600217838
Based on the authors recent investigations, this book describes the application of glassy and polyphase composite materials for nuclear waste immobilisation.
Jayaseelan DD, Lee WE, Amutharani D, et al., 2007, In situ formation of silicon carbide nanofibers on cordierite substrates, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 90, Pages: 1603-1606, ISSN: 0002-7820
Lee WE, Arshad SE, James PF, 2007, Importance of crystallization hierarchies in microstructural evolution of silicate glass-ceramics, 8th International Symposium on Crystallization in Glasses and Liquids, Publisher: BLACKWELL PUBLISHING, Pages: 727-737, ISSN: 0002-7820
Lee WE, Boccaccini AR, Labrincha JA, et al., 2007, Ceramic technology and sustainable development, AMERICAN CERAMIC SOCIETY BULLETIN, Vol: 86, Pages: 18-25, ISSN: 0002-7812
Li Z, Lee WE, Zhang S, 2007, Low-temperature synthesis of CaZrO3 powder from molten salts, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 90, Pages: 364-368, ISSN: 0002-7820
Pankov AS, Batyukhnova OG, Ojovan MI, et al., 2007, Simulation of self-irradiation of high-sodium content nuclear waste glasses, SCIENTIFIC BASIS FOR NUCLEAR WASTE MANAGEMENT XXX, Vol: 985, Pages: 353-+, ISSN: 0272-9172
Li Z, Zhang S, Lee WE, 2007, Molten salt synthesis of LaAlO3 powder at low temperatures, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 27, Pages: 3201-3205, ISSN: 0955-2219
Li Z, Zhang S, Lee WE, 2007, Molten salt synthesis of zinc aluminate powder, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 27, Pages: 3407-3412, ISSN: 0955-2219
Bhattacharya G, Zhang S, Jayaseelan DD, et al., 2007, Mineralizing effect of Li2B4O7 and Na2B4O7 on magnesium aluminate spinel formation, J. Am. Ceram. Soc., Vol: 90, Pages: 97-106
Jayaseelan DD, Zhang S, Hashimoto S, et al., 2007, Template formation of magnesium aluminate (MgAl2O4) spinel microplatelets in molten salt, J. Europ. Ceram. Soc., Vol: 27, Pages: 4745-4749
Ojovan MI, Lee WE, 2006, Topologically disordered systems at the glass transition, JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 18, Pages: 11507-11520, ISSN: 0953-8984
Ojovan MI, Pankov A, Lee WE, 2006, The ion exchange phase in corrosion of nuclear waste glasses, JOURNAL OF NUCLEAR MATERIALS, Vol: 358, Pages: 57-68, ISSN: 0022-3115
Coleman NJ, Brassington DS, Raza A, et al., 2006, Calcium silicate sorbent from secondary waste ash: Heavy metals-removal from acidic solutions, ENVIRONMENTAL TECHNOLOGY, Vol: 27, Pages: 1089-1099, ISSN: 0959-3330
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