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Affichage de 31 à 40 sur 547

Article dans une revue

Microwave-assisted debinding of Al2O3 parts printed by stereolithography

Maria Canillas, Florian Jean, Anthony Thuault, Dominique Hautcoeur, Anne Leriche

Complex shapes pieces of Al2O3 can be rapidly shaped by SLA technology. However, debinding and sintering post-shaping steps still involve long working times. Sintering by microwave has been previously studied providing important time-saving in the fabrication processes and finer microstructures.…

Ceramics International, 2023, 49 (11), pp.18343-18352. ⟨10.1016/j.ceramint.2023.02.206⟩. ⟨hal-04281974⟩

Article dans une revue

Mathematical analysis of a thermodynamically consistent reduced model for iron corrosion

Clément Cancès, Claire Chainais-Hillairet, Benoît Merlet, Federica Raimondi, Juliette Venel

We are interested in a reduced model for corrosion of iron, in which ferric cations and electrons evolve in a fixed oxide layer subject to a self-consistent electrostatic potential. Reactions at the boundaries are modeled thanks to Butler-Volmer formulas, whereas the boundary conditions on the…

Zeitschrift für Angewandte Mathematik und Physik = Journal of Applied mathematics and physics = Journal de mathématiques et de physique appliquées, 2023, 74 (3), pp.96. ⟨10.1007/s00033-023-01970-6⟩. ⟨hal-03549457v2⟩

Article dans une revue

On the notion of ground state for nonlinear Schrödinger equations on metric graphs

Colette De Coster, Simone Dovetta, Damien Galant, Enrico Serra

We compare ground states for the nonlinear Schrödinger equation on metric graphs, defined as global minimizers of the action functional constrained on the Nehari manifold, and least action solutions, namely minimizers of the action among all solutions to the equation. In principle, four alternative…

Calculus of Variations and Partial Differential Equations, 2023, 62 (5), pp.159. ⟨10.1007/s00526-023-02497-4⟩. ⟨hal-03948682⟩

Article dans une revue

Surface structuring of β-TCP and transition to α-TCP induced by femtosecond laser processing

D Aceti, E Filipov, L Sotelo, T Fontanot, S Christiansen, Marie Lasgorceix, Anne Leriche, I Buchvarov, A Daskalova

Abstract Tricalcium phosphate (Ca 3 (PO 4 ) 2 , TCP), is one of the most studied and used as material for bioresorbable implants. The β phase has a slower dissolution dynamic and ensures mechanical support for a longer time in biological environment, while a faster release of ions characterize the…

Journal of Physics: Conference Series, 2023, 2487 (1), pp.012043. ⟨10.1088/1742-6596/2487/1/012043⟩. ⟨hal-04313350⟩

Article dans une revue

Stabilization Results of a Piezoelectric Beams with Partial Viscous Dampings and Under Lorenz Gauge Condition

Mohammad Akil, Abdelaziz Soufyane, Youssef Belhamadia

In this paper, we investigate the stabilization of a one-dimensional piezoelectric (Stretching system) with partial viscous dampings. First, by using Lorenz gauge con- ditions, we reformulate our system to achieve the existence and uniqueness of the solution. Next, by using General criteria of…

Applied Mathematics and Optimization, 2023, 87 (2), ⟨10.1007/s00245-022-09935-3⟩. ⟨hal-04346709⟩

Article dans une revue

Comparison of nonlinear field-split preconditioners for two-phase flow in heterogeneous porous media

Mamadou N'Diaye, Francois P. Hamon, Hamdi A. Tchelepi

This work focuses on the development of a two-step field-split nonlinear preconditioner to accelerate the convergence of two-phase flow and transport in heterogeneous porous media. We propose a field-split algorithm named Field-Split Multiplicative Schwarz Newton (FSMSN), consisting in two steps:…

Computational Geosciences, 2023, 27, ⟨10.1007/s10596-023-10200-x⟩. ⟨hal-04454790⟩

Article dans une revue

Study of neck formation and densification in porous hydroxyapatite ceramics using thermal conductivity measurements

David Stanley Smith, Pierre Lefeuvre, Maxence Renaux, Benoît Nait-Ali, Anne Leriche

Neck formation and densification during sintering have strong effects on the thermal conductivity of a porous ceramic body. This has been described by an analytical model using grain conductivity, grain size, pore fraction and particle – particle contact area as input parameters. It has been tested…

Open Ceramics, 2023, 13, pp.100329. ⟨10.1016/j.oceram.2023.100329⟩. ⟨hal-04491939⟩

Article dans une revue

Stabilization of the generalized Rao‐Nakra beam by partial viscous damping

Mohammad Akil, Zhuangyi Liu

In this paper, we consider the stabilization of the generalized Rao‐Nakra beam equation, which consists of four wave equations for the longitudinal displacements and the shear angle of the top and bottom layers and one Euler–Bernoulli beam equation for the transversal displacement. Dissipative…

Mathematical Methods in the Applied Sciences, 2023, 46 (2), pp.1479-1510. ⟨10.1002/mma.8591⟩. ⟨hal-04347014⟩

Article dans une revue

How are alkali-activated materials impacted by incorporating low viscosity organic liquids?

Charles Reeb, Catherine A. Davy, Matthieu de Campos, Jérôme Hosdez, Christel Pierlot, Cyrille Albert-Mercier, David Lambertin

This research determines an adequate alkali-activated material (AAM) for the incorporation of huge amounts (20 or 40% vol) of low viscosity organic liquids (LVOL), e.g. for waste stabilization/solidification. The selected AAM are either based on high-Ca content blast furnace slag, or on low Ca-…

Materials and structures, 2023, 56 (1), pp.11. ⟨10.1617/s11527-022-02089-2⟩. ⟨hal-04491967⟩

Article dans une revue

Mg2+, Sr2+, Ag+, and Cu2+ co-doped beta-tricalcium phosphate: Improved thermal stability and mechanical and biological properties

Nicolas Somers, Florian Jean, Marie Lasgorceix, Giovanni Urruth, Sandra Balvay, Claire Gaillard, Laurent Gremillard, Anne Leriche

β-tricalcium phosphate (β-TCP, β-Ca3(PO4)2) is an attractive biomaterial for bone repair applications. However, its sintering and mechanical properties are limited by a problematic phase transition to α-TCP. Cationic doping of β-TCP is able to postpone the formation of α-TCP allowing higher…

Journal of the American Ceramic Society, 2023, 106 (7), pp.4061-4075. ⟨10.1111/jace.19093⟩. ⟨hal-04103197⟩