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Breakthrough in New Chemical Materials Workshop, 12-13 November, 2001, Italia

Breakthrough in New Chemical Materials Workshop, 12-13 November, 2001, Italia. 1. MICROMECHANICAL PROPERTIES OF THIN-FILM CERAMIC MATERIALS Sobko S.A. Russian Federal Nuclear Centre- All Russian Scientific Research Institute of Technical Physics

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Breakthrough in New Chemical Materials Workshop, 12-13 November, 2001, Italia

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  1. Breakthrough in New Chemical Materials Workshop, 12-13 November, 2001, Italia 1 MICROMECHANICAL PROPERTIES OF THIN-FILM CERAMIC MATERIALS Sobko S.A. Russian Federal Nuclear Centre- All Russian Scientific Research Institute of Technical Physics 456770, Snezhinsk, Chelyabinsk region, P.O. 245

  2. CONTENTS 2 • PAST RFNC-VNIITF experience in non-metal and ceramic materials production and application · -Ultra-fine synthetic detonation-produced diamonds · -Development and studies of glass-sealants · -Solid oxide fuel cell (SOFC) • PRESENT New approaches to SOFC Thin-film electrolytes · -Electron-beam sputtering · -Peculiarities of ceramic coatings Micro-mechanical properties of thing-film ceramic coatings. · -Development of MMT techniques · -Testing of coatings • FUTURE Projects proposals

  3. GLASS-SEALANTS 3 • R&D of glass-sealants for gas-tight joining of ceramic parts of disparate materials • R&D of glass-sealants for heat-resistant joining of ceramic and metal • R&D of glass-sealants for gas-tight andheat-resistant joining of ceramic parts of disparate materials

  4. ULTRA-FINE DIAMOND 4 SUFDD – Synthetic ultra-fine detonation-produced diamonds • 1. Powder is produced in explosion chamber at disposal of explosives, then cleaned, separated and dried up • 2. Blanks as cylinders dia. 3 mm, 3 mm high sintered under high pressure and temperature • 3. Dies, nozzles for water-jetting, tips of hardness gages are made from sinters • Properties of diamond, but lower cost

  5. SOFC 5 Development of solid oxide fuel cell (SOFC)power plant • Materials: - Electrode materials: Co-cermet, Ni- cermet, chromites, manganites, etc. - Electrolyte: oxide zirconia based • Operational features: - High temperature (up to 1000C) - Oxidizing environment on the cathode side - Reducing environment on the anode side

  6. NEW APPROACHES TO SOFC 6 • Research of support tubular electrolytes with improved microstructure produced from fine powders • Application of thin-film electrolytes for : - Reduction of electrolyte ionic resistance - High specific power at operational temperature (up to 800 C). • Deposition techniques and structure/performance features of electrolyte coatings

  7. THIN-FILM CERAMIC COATINGS.Sputtering technology 7 • Layout of electron-beam sputtering • Optimum parameters: - Electron beam power - Density of input power - Productivity

  8. THIN-FILM CERAMIC COATINGS.Sputtering technology 8 • Thickness of coating : 10-20 µm • Identical chemical and phase composition of coating and sputtered YSZ target • Absence of porosity • Pillar-like structure

  9. MICRO-MECHANICAL PROPERTIES OF CERAMIC COATINGS. Development of MMT techniques 9 • Combined technique: combination of bending and indentation testing • Scratching technique • Static indentation - Calculation of indent design - Calculation of integrated microhardness HVJ of ceramic coatings from HV data

  10. MICRO-MECHANICAL PROPERTIES OF CERAMIC COATINGS Testing of coatings 10 • Results of ceramic coatings MMT on metallic substrates - Standard microhardness HV - Integrated microhardness HVJ - Evaluation of coating fracture toughness • Recommendations for coating deposition process

  11. INTERNATIONAL COOPERATION 11 • Sandia National Labs • Argonne National Laboratory • Lawrence Livermore National Laboratory • Le Comissariat a l’Energie Atomique • Electric Power Research Institute • ExxonMobil Upstream Research Company

  12. PROPOSALS ON POSSIBLE PROJECTSSOFC 11 • Improvement of mechanical and isotropy-related properties of YSZ coatings produced by spraying and sputtering in vacuum as applied to SOFC thin-film electrolytes • Development of techniques for deposition thin-film deposition on porous electrodes in solid oxide fuel cells • Research and development of SOFC materials control techniques • Characterization of single fuel cell based on sol-gel produced materials

  13. PROPOSALS ON POSSIBLE PROJECTSGlass-sealants, Ultra-fine diamond &others 12 • Research and development of technologies for production of refractory gas-tight power input connectors • Application of ultra-fine diamond as indentation tool • Research of esthetic and mechanical properties of crystalline-ceramic and amorphous-like coatings produced by spraying/sputtering in vacuum from natural minerals • Research of micro-imprintsIF applicability for fracture toughness and strength evaluation of thin-film ceramic coatings within pre-certification studies • Research and development of non-radiation sensor of asphalt and concrete density

  14. CONTACT INFO 13 Russian Federal Nuclear Center- All-Russia Research Institute of Technical Physics (RFNC-VNIITF) 456770, Snezhinsk, Chelyabinsk region, P.O. box 245   E-mail: avva@ted.ch70.chel.su Fax: 7-(351-72) 2-39-82

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