A5012036875- Advanced ceramic materials synthesis
- Nuclear Materials and Properties
- Aluminum Alloys Composites Properties
- Advanced materials and composites
- Fusion materials and technologies
- Concrete and Cement Materials Research
- High-Velocity Impact and Material Behavior
- Graphite, nuclear technology, radiation studies
- Fiber-reinforced polymer composites
- Advanced Battery Technologies Research
- Fuel Cells and Related Materials
- Microstructure and Mechanical Properties of Steels
- Nuclear reactor physics and engineering
- Metallurgy and Cultural Artifacts
- Boron and Carbon Nanomaterials Research
- Graphene research and applications
- Digital Image Processing Techniques
- Advanced Surface Polishing Techniques
- Hybrid Renewable Energy Systems
- Advancements in Solid Oxide Fuel Cells
- Nuclear materials and radiation effects
- Magnesium Oxide Properties and Applications
- Additive Manufacturing and 3D Printing Technologies
- 3D IC and TSV technologies
- Electron and X-Ray Spectroscopy Techniques
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2014-2024
CEA Le Ripault
2023-2024
CEA Paris-Saclay
2017-2023
Université Paris-Saclay
2017-2023
CEA Paris-Saclay - Etablissement de Saclay
2022
Laboratoire des Technologies de la Microélectronique
2019
Direction des énergies
2017
U.S. Air Force Institute of Technology
2008
Wright-Patterson Air Force Base
2008
Teledyne Technologies (United States)
2003
In the framework of SiC/SiC composite development for nuclear applications, influence pyrocarbon interphase texture and thickness on mechanical behavior both as-processed materials irradiated is a major concern. Thus, PyC has to be clearly addressed define its optimal chemical vapor infiltration processing parameters. For this purpose, specific 2.5D composites reinforced with Hi-Nicalon S fibers two kinds were produced. Transmission electronic microscopy allowed microstructure/texture...
Single-rod oxidation and quench experiments at very high temperatures in steam atmosphere were conducted with advanced, nuclear grade SiCf/SiC CMC cladding tube segments. A transient experiment was performed until severe local degradation of the sample maximum temperature approximately 1845 °C. The caused by complete consumption external CVD-SiC sealcoat, resulting access to fiber–matrix composite less corrosion resistance. Approaching these accompanied accelerated gas release mainly H2 CO2,...
Abstract While presenting similar properties, the Hi‐Nicalon Type S (HNS) and Tyranno SA3 (TSA3) SiC fibers exhibit different mechanical behaviors when used as reinforcement in SiC/SiC composites. Indeed, HNS‐reinforced composites a pseudoductile behavior whereas TSA3‐based show low ductility. Even though differences their grain size surface roughness could explain part of this phenomenon, chemical composition microstructure outermost play key role. The recent availability new SA4 (TSA4)...
To ensure the leak tightness of SiC/SiC composites cladding, niobium and tantalum have been retained as liner/coating materials for their high melting point, ductility weldability; however, chemical compatibility at temperatures towards SiC remains to be assessed. In literature, large discrepancies in composition reaction zone kinetics were noticed between some metallic liners SiC. this work, diffusion couple experiments Nb Ta with conducted (1050–1500 °C) determine paths order estimate...
Proton exchange membrane (PEM) fuel cells are energy sources that have the potential to replace alkaline for space programs. Broad power ranges, high peak-to-nominal capabilities, low maintenance costs, and promise of increased life major advantages PEM technology in comparison technology. The probability replacing applications will increase if is verified by achieving a minimum 10,000 hours operating life. Durability plays an important role process evaluation selection MEAs Teledyne s Phase...
Ceramic matrix composites reinforced by external polymerization of acrylonitrile (ex-PAN) carbon fibers with pyrocarbon (PyC) interphase are attractive materials for thermomechanical applications. Nevertheless, C/SiC suffer from a low damage tolerance. A 1600°C thermal pretreatment the led to an improvement mechanical properties composites. Even if this heat treatment was seen modify fiber microstructure and texture, changes were not sufficient explain observed improvements. The consequences...
The rheological properties of BAS (BaAl2Si2O8) slurries are investigated in order to optimize the impregnation an alumina preform manufacture oxide/oxide composite materials. fiber morphology has been deeply investigated, especially gap within tows and compared grain size matrix powder. slurry viscosity is measured as a function powder organic additives concentration find best combination. optimal combination evaluated by different measurements including: zeta potential, sedimentation...