693.932 PEOPLE
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Podor, Renaud
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (50/50 displayed)
- 2024Development of a microfurnace dedicated to in situ scanning electron microscope observation up to 1300 °C. III. In situ high temperature experiments
- 2024Speciation and chemical behavior of molybdenum in uranium dioxide samples prepared by hydroxide precipitationcitations
- 2024Speciation and chemical behavior of molybdenum in uranium dioxide samples prepared by hydroxide precipitationcitations
- 2024On the oxidation and ignition of uranium carbide fragments in air and comparison with zirconium carbide oxidation
- 2024Oxidation behavior of platinum-containing γ, γ′ and TROPEA superalloy
- 2024Polyepitaxial grain matching to study the oxidation of uranium dioxidecitations
- 2024Oxidation Behavior of Platinum-Containing Model γ and γ′ and TROPEA Superalloy
- 2024Impact of gamma dose rate on the alteration of nuclear glass in geological disposal conditions
- 2024Type I Hot Corrosion Of Platinum-Containing Model γ and γ′ Alloyscitations
- 2023Modelisation of liquid nuclear waste vitrification : focus on the chemical processes
- 2023Role of molybdenum on the structure and properties of A2O-P2O5-MoO3 (A = Na, Ag, Rb, Cs) glassescitations
- 2023Liquid-liquid phase separation in borosilicate glass enriched in MoO3 – experimental investigations and thermodynamic calculationscitations
- 2023Observation of glass synthesis by in-situ high temperature ESEM
- 2023Understanding the solid/liquid interface evolution during the dissolution of Nd-doped UO2 by macro-/microscopic dual approachcitations
- 2022Real‐time capturing of microscale events controlling the sintering of lead‐free piezoelectric potassium‐sodium niobatecitations
- 2022Spontaneously crystallizing glass-ceramic mechanisms
- 2022Liquid-liquid phase separation in borosilicate glass enriched in MoO3 experimental investigations and thermodynamic calculationscitations
- 2021Effect of the process atmosphere on glass foam synthesis: A high-temperature environmental scanning electron microscopy (HT-ESEM) studycitations
- 2021Should Gold Marker or TEM-ASTAR Characterization Be Used to Determine Oxide Growth Direction?citations
- 2021Crystallization mechanism of BaO-CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> (BCAS) glass thin-filmscitations
- 2021SEraMic: a semi-automatic method for the segmentation of grain boundariescitations
- 2021Evaluation and application of a new scintillator‐based heat‐resistant back‐scattered electron detector during heat treatment in the scanning electron microscopecitations
- 2020Structural changes of Nd- and Ce-doped ammonium diuranate microspheres during the conversion to U<sub>1-y</sub> Ln yO<sub>2±x</sub>citations
- 2020In situ surface imaging: High temperature environmental SEM study of the surface changes during heat treatment of an Al Si coated boron steelcitations
- 2019Microstructural evolution of UO2 pellets containing metallic particles of Ru, Rh and Pd during dissolution in nitric acid solution: 3D-ESEM monitoringcitations
- 2019Unveiling the mechanisms of solid-state dewetting in Solid Oxide Cells with novel 2D electrodescitations
- 2018Effect of powder morphology on sintering kinetics, microstructure and mechanical properties of monazite ceramicscitations
- 2018On the solid-state dewetting of polycrystalline thin films: Capillary versus grain growth approachcitations
- 2017Densification behavior and microstructure evolution of yttrium-doped ThO 2 ceramicscitations
- 2017Densification behavior and microstructure evolution of yttrium-doped ThO$_2$ ceramicscitations
- 2017Impact of iron and magnesium on glass alteration: Characterization of the secondary phases and determination of their solubility constantscitations
- 2017Novel approaches for the in situ study of the sintering of nuclear oxide fuel materials and their surrogatescitations
- 2015Characterization of the ion-amorphization process and thermal annealing effects on third generation SiC fibers and 6H-SiCcitations
- 2014Electrochemical behavior of glass melts: application to corrosion processescitations
- 2013Approach of phase transformations and densification in nanostructured and (Bi2O3, ZnO,TiO2) doped silica ceramicscitations
- 2013In situ study of the crystallization mechanism in LiNbO$_3$-SiO$_2$ glasses
- 2012Calcined Resin Microsphere Pelletization (CRMP) a novel process for sintered metallic oxide pellets synthesis.citations
- 2012Mechanism of RuO2 Crystallization in Borosilicate Glass: An Original in Situ ESEM Approachcitations
- 2008Modelling of the grain growth and the densification of SnO2-based ceramicscitations
- 2005Influence of the microstructural fineness of cast superalloys on their high temperature oxidation behaviour
- 2005Study of Carbide Transformations during High-Temperature Oxidation of Nickel-Base Superalloyscitations
- 2005Influence of dendrites orientation on the high-temperature oxidation behaviour of cast nickel alloys
- 2004Influence of the Microstructural Texture of Cast Superalloys on their High-Temperature Oxidation Behaviourcitations
- 2004Influence of the microstructure texture of nickel base and cobalt base cast superalloys on their oxdation behaviour at high temperature ; Influence de la texture microstructurale de superalliages de fonderie à base de nickel et à base de cobalt sur leur comportement en oxydation à haute températurecitations
- 2004State of the Sub-surface Microstructure of Carbides strengthened cast Superalloys after High Temperature Oxidation -Use of Thermodynamic Modelling for a better Understandingcitations
- 2004State of the Sub-surface Microstructure of Carbides strengthened cast Superalloys after High Temperature Oxidation - Use of Thermodynamic Modelling for a better Understanding
- 2003Corrosion of superalloys in molten glass - Electrochemical characterization of the passive state
- 2003An example of thermodynamical calculations applied to the study of the high temperature behaviour of Co-base superalloys strengthened by tantalum carbides
- 2002High temperature oxidation and glass corrosion of cobalt base superalloys
- 2002Use of electrochemical techniques for the characterization of alloys corrosion in molten glasses
Places of action
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article
Real‐time capturing of microscale events controlling the sintering of lead‐free piezoelectric potassium‐sodium niobate
Abstract
Sintering is a very important process in materials science and technological applications. Despite breakthroughs in achieving optimized piezoelectric properties, fundamentals of K$_{0.5}$Na$_{0.5}$NbO$_3$ (KNN) sintering are not yet fully understood, facing densification versus grain growth competition. At present, microscale events during KNN sintering under reducing atmospheres are real-time monitored using a High Temperature-Environmental Scanning Electron Microscope. A two contacting KNN particles model satisfying the Kingery and Berg's bulk diffusion model is reported. Dynamic events like individual grain growth and grain elimination process are explored through a postanalysis of recorded image series. The diffusion coefficient for oxygen vacancies of 10$^{−8}$ cm$^2$ s$^{−1}$ and average boundary mobility of 10$^{−9}$ cm$^4$ J$^{−1}$ s$^{−1}$ are reported for the KNN ceramics. Moreover, the local pore shrinkage is consistent with the Kingery and François's concept of pore stability except that pore curvatures are not all concave, convex or flat due to anisotropic grain-boundary energies. The global grain growth kinetics are described using parabolic and/or cubic laws. The effect of atmospheres and microstructure evolution on the intrinsic and extrinsic contributions to the dielectric response using Rayleigh's law is also explored. These results bring a new breath for KNN sintering studies in order to adapt the sintering process.