A5036773825- High-Temperature Coating Behaviors
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Advanced ceramic materials synthesis
- Catalytic Processes in Materials Science
- Nuclear Materials and Properties
- Fusion materials and technologies
- Advanced Fiber Optic Sensors
- Tribology and Wear Analysis
- Flame retardant materials and properties
- Laser Material Processing Techniques
- Magnetic confinement fusion research
- Ultrasonics and Acoustic Wave Propagation
- Concrete Properties and Behavior
- Laser-induced spectroscopy and plasma
- Drilling and Well Engineering
- Diamond and Carbon-based Materials Research
- Nuclear Physics and Applications
- Plasma Diagnostics and Applications
- Brake Systems and Friction Analysis
- Thermography and Photoacoustic Techniques
- Glass properties and applications
- High Entropy Alloys Studies
- Rock Mechanics and Modeling
- Solar Thermal and Photovoltaic Systems
CEA Le Ripault
2013-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2013-2024
CEA DAM Île-de-France
2017-2020
École Nationale Supérieure de Céramique Industrielle
2005-2006
The divertor is the key in-vessel plasma-facing component being in charge of power exhaust and removal impurity particles. In DEMO, targets must survive an environment high heat fluxes (~up to 20 MW m−2 during slow transients) neutron irradiation. One advanced concept for components monoblock configuration concerns insertion a compositionally graded layer between tungsten CuCrZr instead soft copper interlayer. As first step, thin (~25 μm) was developed. second thicker (~500 μm), which...
Normal hemispherical spectral reflectances of plasma sprayed Al2O3/Al cermets were acquired from visible to infrared wavelengths for several metal concentrations. Since optical response these coatings is highly dependent on volumetric and/or surface light scattering, special attention was paid characterization the composition, microstructure, and roughness such coatings. The roles effects are highlighted by a comparison between data measured as-sprayed polished As expected, reflectance rises...
Performance enhancement of gas turbines is a main issue for the aircraft industry. Over many years, large part effort has been focused on development more insulating Thermal Barrier Coatings (TBCs). In this study, Yttria Stabilized Zirconia (YSZ) columnar structures are processed by Suspension Plasma Spraying (SPS). These have already demonstrated abilities to get improved thermal lifetime, similarly standard YSZ TBCs performed EB-PVD. diffusivity measurements coupled with differential...
Very Low Pressure Plasma Spraying (VLPPS) is an emerging spray process nowadays intensively studied by many research centers in the World. To date, studies are mostly focused on manufacturing of ceramic or metallic coatings. None refers to composite coatings reactive plasma spraying under very low pressure (i.e., ~150 Pa).
Abstract Very low pressure plasma spraying (VLPPS) has been used to manufacture thin, dense, finely-structured ceramic coatings for various applications. This paper presents the results of work in which VLPPS is deposit metal. Aluminum was chosen as a demonstrative material, due its moderate vaporization enthalpy (38.23 KJ·cm-3), with objectives better understanding behavior solid precursor injected into jet, leading formation vapors, and controlling factors affecting coating structure....
In-situ monitoring of femtosecond point-by-point written Fiber Bragg Gratings embedding in a ceramic material deposited by plasma-spraying was realized. High temperature measurements were successfully performed on the additively manufactured specimen up to 400°C.
Abstract Normal hemispherical spectral reflectances of plasma sprayed Al2O3/Al cermets were measured from visible to infrared wavelengths for several metal concentrations ranging pure alumina aluminum. Microstructure and composition the samples carefully characterized explain their optical response, highly dependent on volume and/or surface scattering. Besides contribution knowledge microstructure, 2D scanning electron microscopy 3D micro-tomography images exploited get statistical data in...
Abstract Very low pressure plasma spraying (VLPPS) is an emerging process allowing manufacturing oxide and metallic coatings by condensation of vapors generated feedstock powder vaporization. This operates at unusually pressures, typically between 100 1000 Pa. paper aims presenting recent developments for Ti,Al,N via a reactive mode. At first, nitrogen was used as the primary forming gas to enrich surrounding with nitriding species. Plasma jet mass enthalpy substrate surface temperature were...
Abstract This work evaluates the potential of using a plasma spray process to introduce SiC into zirconia diboride ceramic coatings. Controlling spraying ultra-refractory compound ZrB2 is first challenge as it represents matrix in which particles will reside. To that end, experiments focus on parameters influence jet and nature precursor feedstock. The results show coatings containing controlled amounts can be obtained through high-energy suspension spraying. ZrB2-SiC evaluated...
Pairs of arrays point-by-point fiber Bragg Gratings written with a femtosecond laser were anchored K-type thermocouple within an asymmetrical titanium substrate. Three anchoring methods used, including silica based, graphite based glue commercially available as well Yttria Stabilized Zirconia deposited by Atmospheric Plasma Spraying. The optical fibers first recoated inorganic coating, specifically developed to resist high temperatures above 800°C. plate was exposed intense heat flow...
Optical fiber sensors received a large interest in the past decades thanks to key advantages such as high temperature resistance, insensitivity electromagnetic perturbation, and low intrusivity allowing an efficient integration into metallic parts [1]… In aeronautical context, aircraft structures can be exposed variation well acceleration vibration levels. are good candidates monitor under environments.