Discussion slides Si C composites RD needs for

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Discussion slides - Si. C composites -

Discussion slides - Si. C composites -

R&D needs for Si. C/Si. C • General needs • Transmutation effects • Single

R&D needs for Si. C/Si. C • General needs • Transmutation effects • Single effect studies (experimental and modeling) • Fusion spectrum • High dose-tolerant materials • True Si. C fiber • Interphase stability • Better defined design windows • Key unknowns are related to two issues above • Continue advancing fundamental radiation effects studies • Design-specific needs • Joining and integration • Manifold for ARIES-ACT 1 may set a reasonable R&D goal • Hermeticity • Ductile coating for He-cooled modular blanket may set a reasonable R&D goal • Related technological issues include • Design methodology • Detailed neutronics and damage analysis

Discussion topics - transmutation 1. What experiments are needed? • Single effect experiments coupled

Discussion topics - transmutation 1. What experiments are needed? • Single effect experiments coupled with modeling • Ion implantation; multi-ion irradiation • Dynamic helium/hydrogen charging • Spallation or fusion spectrum neutrons • STIP-V PIE • Additional spallation neutron experiment (improved T control) • Future fusion spectrum 2. How do we maximize value from current experiments? • Expanded post-implantation examination • E. g. corrosion, electrical conductivity, micro-scale thermal conductivity • Extensive characterization of STIP-V specimens 3. How can we increase benefits from collaborations, domestic and international? • This is an area of strong interest in BA, which is disconnected from US program • If/when fusion neutron source is to be available in EU or Japan, engage in collaboration.

Discussion topics – high dose-tolerant materials 1. What experiments are needed? • Irradiation of

Discussion topics – high dose-tolerant materials 1. What experiments are needed? • Irradiation of advanced composites with alternative Si. C fibers and advanced interphases • Small diameter CVD Si. C fibers • Oxide and other interphases • Can start from ion irradiation 2. How do we maximize value from current experiments? FFF CVD Si. C fibers • Better understanding of high dose irradiation effects and damage accumulation in high purity Si. C and potential interphase material will be useful. 3. How can we increase benefits from collaborations, domestic and international? • QST shares interest • Leverage with NE program is a realistic possibility

Discussion topics – better define design windows 1. What experiments are needed? • High

Discussion topics – better define design windows 1. What experiments are needed? • High temperature high dose phenomena • High dose irradiation in 800 - 1500°C temperature range • Variations in starting microstructures and chemistry 2. How do we maximize value from current experiments? • There may be synergism with needs for understanding radiation effects in novel refractory materials for potential PFC applications. 3. How can we increase benefits from collaborations, domestic and international? • QST shares interest • Leverage with NE and GFR programs is a realistic possibility

Discussion topics – Hermetic composites 1. What experiments are needed? • Developmental work on

Discussion topics – Hermetic composites 1. What experiments are needed? • Developmental work on hermetic coating • (Fundamental research on self-heal matrix through environmental interactions) 2. How do we maximize value from current experiments? • Gas permeability testing capability for PFC/PFM is appropriate to evaluate developmental materials 3. How can we increase benefits from collaborations, domestic and international? • NE program currently undertakes this challenge. Fusion applications requires tolerance against higher neutron doses but less harsh in terms of temperature and chemical environment (if He)