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Article dans une revue

Spark Plasma Sintering and tribological behavior of Ti3SiC2–Ti5Si3–TiC composites

Abdessabour Benamor, Youcef Hadji, Nabil Chiker, Adel Haddad, Bendiba Guedouar, Mohamed Labaiz, Maamar Hakem, Arnaud Tricoteaux, Christelle Nivot, Jean-Pierre Erauw, Riad Badji, Mohamed Hadji

Herein, we study the effect of TiC content on the tribological behavior of four Ti3SiC2/Ti5Si3/TiC composites, prepared through Spark Plasma Sintering. The tribological properties were investigated under dry sliding, against Al2O3 counterpart at room temperature, under different normal loads and...

Ceramics International, 2019, 45 (17), pp.21781-21792. ⟨10.1016/j.ceramint.2019.07.181⟩. ⟨hal-03479239⟩

Article dans une revue

Nanotechnology to improve the performances of hydrodynamic surfaces

Ali Ahmed Alshehri, Philippe Champagne, Laurent Keirsbulck, El Hadj Dogheche

ure continues to inspire scientists to adapt solutions in order to satisfy human needs, mainly in the maritime domain with metallic surface corrosion and its mechanical friction. In this research, the source of innovation comes from the lotus leaf and its well-known super-hydrophobicity. In this...

Coatings, 2019, 9 (12), pp.808. ⟨10.3390/coatings9120808⟩. ⟨hal-03133311⟩

Article dans une revue

Open-celled silicon carbide foams with high porosity from boron-modified polycarbosilanes

Charlotte Durif, Mélanie Wynn, Maxime Balestrat, Giorgia Franchin, Young-Wook Kim, Anne Leriche, Philippe Miele, Paolo Colombo, Samuel Bernard

Open-Celled silicon carbide (SiC) foams were prepared from a mixture of a boron-modified polycarbosilane as a preceramic polymer and poly(methymetacrylate) (PMMA) microbeads as sacrificial agents. The process consists in the cross-linking of the liquid allylhydridopolycarbosilane (AHPCS, SiC...

Journal of the European Ceramic Society, 2019, 39 (16), pp.5114-5122. ⟨10.1016/j.jeurceramsoc.2019.08.012⟩. ⟨hal-02321489⟩

Article dans une revue

Minimal Lagrangian submanifolds of the complex hyperquadric

Haizhong Li, Hui Ma, Joeri van Der Veken, Luc Vrancken, Xianfeng Wang

We introduce a structural approach to study Lagrangian submanifolds of the complex hyperquadric in arbitrary dimension by using its family of non-integrable almost product structures. In particular, we define local angle functions encoding the geometry of the Lagrangian submanifold at hand. We...

Science China Mathematics, 2019, 63 (8), pp.1441-1462. ⟨10.1007/s11425-019-9551-2⟩. ⟨hal-03723643⟩

Article dans une revue

Dielectric, ferroelectric, piezoelectric properties, and impedance spectroscopy of (Ba 0.85 Ca 0.15 )(Ti 0.9 Zr 0.1 )O 3 -x% (K 0.5 Bi 0.5 )TiO 3 lead-free ceramics

Naima Zidi, Ahcène Chaouchi, Mohamed Rguiti, Yannick Lorgouilloux, Christian Courtois

The influence of (K0.5Bi0.5)TiO3 on structure, microstructure and piezoelectric properties of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 (BCTZ) piezoelectric ceramics was investigated. Impedance spectroscopy was used to get better understanding of the electrical properties of the materials as a function of...

Ferroelectrics, 2019, 551 (1), pp.152-177. ⟨10.1080/00150193.2019.1658043⟩. ⟨hal-03479286⟩

Article dans une revue

Tribological behavior of composites fabricated by reactive SPS sintering in Ti‐Si‐C system

Youcef Hadji, Abdessabour Benamor, Nabil Chiker, Adel Haddad, Nacer Tala-Ighil, Jean-Pierre Erauw, Vedi Dupont, Arnaud Tricoteaux, Christelle Nivot, Anthony Thuault, Mohamed Hadji

In this study, wear and friction behavior of two based-composites from the Ti-Si-C system, (40 wt% TiC; 28 wt% Ti5Si3; 17 wt% Ti3SiC2) and (18 wt% TiC; 26 wt% Ti5Si3; 41 wt% Ti3SiC2) reinforced by 15 wt% of large size SiC (100-150 µm) particles were investigated. The four-phase composites exhibited...

International Journal of Applied Ceramic Technology, 2019, 17 (2), pp.695-706. ⟨10.1111/ijac.13443⟩. ⟨hal-03479330⟩

Article dans une revue

Comparing variational methods for the hinged Kirchhoff plate with corners

Colette De Coster, Serge Nicaise, Guido Sweers

The hinged Kirchhoff plate model contains a fourth order elliptic differential equation complemented with a zeroeth and a second order boundary condition. On domains with boundaries having corners the strong setting is not well‐defined. We here allow boundaries consisting of piecewise C2, 1‐curves...

Mathematical News / Mathematische Nachrichten, 2019, 292 (12), pp.2574-2601. ⟨10.1002/mana.201800092⟩. ⟨hal-03164134⟩

Article dans une revue

A posteriori error estimates for a fully discrete approximation of Sobolev equations

Serge Nicaise, Fatiha Bekkouche

The paper presents an a posteriori error estimator for a (piecewise linear) conforming finite element approximation of some (linear) Sobolev equations in R d , d = 2 or 3, using implicit Euler's scheme. For this discretization, we derive a residual indicator, which uses a spatial residual..., L'accès aux articles de la revue « Confluentes Mathematici » (http://cml.cedram.org/), implique l'accord avec les conditions générales d'utilisation (http://cml.cedram.org/legal/). Toute reproduction en tout ou partie de cet article sous quelque forme que ce soit pour tout usage...

Confluentes Mathematici, 2019, 11 (1), pp.3-28. ⟨10.5802/cml.53⟩. ⟨hal-04305434⟩

Article dans une revue

Local Electrical Characterization of PVDF Textile Filament

Anthony Ferri, François Rault, Antonio da Costa, Cédric Cochrane, Matthieu Boudriaux, Guillaume Lemort, Christine Campagne, Eric Devaux, Christian Courtois, Rachel Desfeux

The piezoelectric behavior of poly(vinylidene fluoride), PVDF, has been known for several decades and is clearly related to its crystalline phases. Many works made on films or fibers have focused on the characterization of the phase transitions during various PVDF processing and on its...

Fibers and Polymers, 2019, 20 (7), pp.1333-1339. ⟨10.1007/s12221-019-8519-6⟩. ⟨hal-02292712⟩

Article dans une revue

A class of analytic pairs of conjugate functions in dimension three

Paul Baird, Elsa Ghandour

We exploit an ansatz in order to construct power series expansions for pairs of conjugate functions defined on domains of Euclidean 3-space. Convergence properties of the resulting series arc investigated. Entire solutions which are not harmonic are found as well as a 2-parameter family of examples...

Advances in Geometry, 2019, 19 (3), pp.421-432. ⟨10.1515/advgeom-2018-0034⟩. ⟨hal-03233957⟩