Publications

• Article dans une revue

Fabrication of doped β-tricalcium phosphate bioceramics by Direct Ink Writing for bone repair applications

Nicolas Somers, Florian Jean, Marie Lasgorceix, Nicolas Preux, Cathy Delmotte, Laurent Boilet, Fabrice Petit, Anne Leriche

β-tricalcium phosphate (β-TCP, β-Ca3(PO4)2) is one of the most attractive biomaterials for bone regeneration and β-TCP macroporous scaffolds are very promising for both cell proliferation and mechanical support. The Additive Manufacturing (AM) process called Direct Ink Writing (DIW), based on the…

Journal of the European Ceramic Society, 2023, ⟨10.1016/j.jeurceramsoc.2022.10.018⟩. ⟨hal-03820943⟩

• Article dans une revue

Morphological, piezoelectric and dielectric properties of piezoelectric lead-free ceramic Bi4Ti3O12 for energy harvesting applications: milling process effects

Meryiem Derraz, Chouaib Ennawaoui, Mohamed Aymen Ben Achour, Abdelowahed Hajjaji, El Mehdi Laadissi, Younes Chhiti, Az Eddine Azim, Charafeddine Jama

A lead-free piezoelectric ceramic, Bismuth titanate (Bi4Ti3O12), is synthesized as an environmentally friendly alternative to the commonly used Lead Zirconate Titanate (PZT). This study focuses on investigating the effects of processing conditions on the morphological and structural properties of…

Matériaux et Techniques, 2023, Matériaux & Techniques, 111 (5-6), pp.502. ⟨10.1051/mattech/2024005⟩. ⟨hal-04526617⟩

• Article dans une revue

Humidity sensing properties of (Na0.5Bi0.5)0.94Ba0.06 TiO3 lead-free ferroelectrics ceramics

Sadia Kennour, Nouara Lamrani, Ahcène Chaouchi, Yannick Lorgouilloux, Mohamed Rguiti, Christian Courtois

In this study, the humidity detection properties of the ceramic with composition (Na0.5Bi0.5)0.94Ba0.06TiO3, noted (NBT-06BT), were investigated. The NBT-06BT ceramic was synthesized by the semi-solid method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The…

Science of Sintering, 2023, 55 (3), pp.339-351. ⟨10.2298/SOS221014015K⟩. ⟨hal-04279102⟩

• Article dans une revue

On the square-root approximation finite volume scheme for nonlinear drift-diffusion equations

Clément Cancès, Juliette Venel

We study a finite volume scheme for the approximation of the solution to convection diffusion equations with nonlinear convection and Robin boundary conditions. The scheme builds on the interpretation of such a continuous equation as the hydrodynamic limit of some simple exclusion jump process. We…

Comptes Rendus. Mathématique, 2023, 361, pp.535--558. ⟨10.5802/crmath.421⟩. ⟨hal-03693887v3⟩

• Article dans une revue

Frequency and load effects on rectifier bridges and active circuits on mechanical energy harvested using piezoelectric materials

Youssef El Hmamsy, Chouaib Ennawaoui, Abdelowahed Hajjaji, El Mehdi Laadissi, El Mehdi Loualid, Mohamed Aymen Ben Achour, Oussama Laayati, Ahmed Chebak

Today, with the worldwide surge in the price of oil, the energy issue has become an important topic and the possibility of exploiting ambient energy is receiving renewed attention. Thus in this study, we are interested in the devices of recovery of piezoelectric energy of vibration whose final…

International Journal of Renewable Energy Research, 2023, 13 (2), ⟨10.20508/ijrer.v13i2.13850.g8759⟩. ⟨hal-04491987⟩

• Article dans une revue

Energy decay of some boundary coupled systems involving wave\ Euler-Bernoulli beam with one locally singular fractional Kelvin-Voigt damping

Mohammad Akil, Ibtissam Issa, Ali Wehbe

In this paper, we investigate the energy decay of hyperbolic systems of wave-wave, wave-Euler-Bernoulli beam and beam-beam types. The two equations are coupled through boundary connection with only one localized non-smooth fractional Kelvin-Voigt damping. First, we reformulate each system into an…

Mathematical Control and Related Fields, 2023, 13 (1), pp.330-381. ⟨10.3934/mcrf.2021059⟩. ⟨hal-04347023⟩

• Article dans une revue

Effects of Reaction Parameters on the Geometry and Crystallinity of Hydrothermally Synthesized ZnO Nanorods for Bio-Fouling Applications

Abderrahmane Hamdi, Chin Sing Lim, Mohamed Aymen Ben Achour, Ali Ahmed Alshehri, Mervat Alamri, D. Deresmes, Serena Lay-Ming Teo, Denis Remiens, El Hadj Dogheche

In this present work, we have successfully synthesized vertical aligned ZnO nanorod arrays (ZnO NRs) on conductive stainless-steel substrate. These ZnO NRs were obtained by using a low temperature, low cost, and eco-friendly hydrothermal approach. The effect of the sol-gel deposited ZnO seed layer…

Coatings, 2023, This article belongs to the Special Issue Deposition and Applications of Protective Films and Coatings, 13 (1), pp.200. ⟨10.3390/coatings13010200⟩. ⟨hal-03952029⟩

• Article dans une revue

Shear Piezoelectricity of Poly(L-lactide) Films Manufactured by Extrusion–Orientation: An Insight on Process–Structure–Property Relationships

Mohamed Aymen Ben Achour, Sophie Barrau, Jean-François Tahon, Mohamed Rguiti, Christian Courtois, Birgit Stubbe, Jean-Marie Raquez, Marie-France Lacrampe, Cédric Samuel

Shear piezoelectric properties of uniaxially stretched poly(l-lactide) (US-PLA) films manufactured by an industrially relevant technique (i.e., extrusion–orientation without poling) are investigated, and specific insight on the process–structure–properties relationships is provided. Two…

ACS Applied Polymer Materials, 2023, 5 (12), pp.9761 - 9775. ⟨10.1021/acsapm.3c01419⟩. ⟨hal-04323414⟩

• Article dans une revue

Goal-oriented error estimation based on equilibrated flux and potential reconstruction for the approximation of elliptic and parabolic problems

Emmanuel Creusé, Serge Nicaise, Zuqi Tang

We present a unified framework for goal-oriented estimates for elliptic and parabolic problems that combines the dual-weighted residual method with equilibrated flux and potential reconstruction. These frameworks allow to analyze simultaneously different approximation schemes for the space…

Computers & Mathematics with Applications, 2023, 146, pp.323-338. ⟨10.1016/j.camwa.2023.07.008⟩. ⟨hal-03719266v2⟩

• Article dans une revue

Evaluation of shear piezoelectric coefficients by a bimorph cantilever technique for extruded and oriented poly( l ‐lactide) films

Mohamed Aymen Ben Achour, Cédric Samuel, Mohamed Rguiti, Sophie Barrau, Christian Courtois, Marie‐france Lacrampe

Uniaxially stretched poly(l-lactide) (US-PLA) films display shear piezoelectric properties of interests for smart applications. However, the measurement of these properties is quite challenging and a simple technique based on bimorph cantilevers is here used. This technique is validated with…