Synthesis Characterisation of Advanced Materials Strategic Components ITER

Synthesis & Characterisation of Advanced Materials Strategic Components * ITER Diverter * ITER (Present Materials) - Surface/Interface Segregation - First Wall / Blanket (Be/Cu-alloy/SS 316 LN) - Radiation Enhanced Diffusion - Diverter (C plasma facing/W/Cu-alloy/SS 316 LN) DEMO (Future Materials) Surface Characterisation & Modelling - Plasma/First Wall Interactions * ITER - Radiation Damage [Ref. 2] - First Wall / Blanket (RAFM Steels, W Alloys) - Surface & Near-Surface Analysis - Diverter (Si. Cf/Si. C, ODS Steels) - Modelling of Near Surface and Collision Cascades Monolithic Synthesis, Characterisation & Modelling * ITER Reference to the established ITER timeline illustrates the “realistic” impact of novel research on future development of fusion technology over the next 20 years. Specifically, the interface analysis (both theoretically and experimentally) of ITER first wall tiles, would be an achievable goal. Alternately, the broadest scope for novel research would centre on the development of DEMO test tiles, including the development of advanced materials capable of operation under higher neutron fluencies and at elevated temperatures (+1100 o. C) - Advanced Ceramic Processing - Joining/Brazing/Diffusion Bonding Novel materials synthesis; achieved by tailoring the chemistry or crystal structure. [Ref. 1] - Novel Characterisation - Bulk Phase ab-initio Calculations ITER/DEMO designs are both contingent on the successful development of radiation tolerant joining techniques, suitable for operation at elevated temperatures. (+1100 o. C) [Ref. 4] First Wall/Blanket Advanced processing can reduce processing temperatures, improve bonding of dissimilar materials, improve stability at high operating temperatures and allow rapid recovery of radiation damage. [Ref. 3] [1] “Self-Propagating High-Temperature Synthesis of Ti 3 Si. C 2: I. Ultra-High Speed Neutron Diffraction Study of the Reaction Mechanism”, D. P. Riley, E. H. Kisi, T. C. Hansen, A. W. Hewat, J. Am. Cer. Soc. , Vol. 85, [10], pp. 2417 -2424, 2002 [2] “Comparative Analysis of Ti 3 Si. C 2 and Associated Compounds Using X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS)”, D. P. Riley, D. J. O’Connor, P. Dastoor, N. Brack, P. J. Pigram, J. Phys. D: Appl. Phys. , Vol. 35, L 1 -L 9, 2002 [3] “SHS of Ti 3 Si. C 2: Ignition Temperature Depression by Mechanical Activation”, D. P. Riley, E. H. Kisi and D Phelan, Accepted J. Euro. Ceram. Soc. . (Submitted 13/9/2004)(Accepted /10/2004) [4] “Synthesis and Characterisation of SHS Bonded Ti 5 Si 3 on Ti Substrates”, D. P. Riley, Accepted to Intermetallics 2005 In-situ analysis allows for rapid optimisation of processing parameters, including the composition of final materials, synthesis times & temperatures and various procedures— foremost being in-situ analysis of Hot Isostatic Pressing (HIP). [Ref. 1]