Publications associées à Couronne (dent)

Design of Customized Mouthguards with Superior Protection Using Digital-Based Technologies and Impact Tests

Dominique Pioletti, Naser Nasrollahzadeh Mamaghani, Martin Broome

Background In contact sports, an impact on the jaw can generate destructive stress on the tooth-bone system. Mouthguards can be beneficial in reducing the injury risk by changing the dynamics of the trauma. The material properties of mouthguards and their ...

Springer2024

3-D contact and pore network analysis of MICP cemented sands

Dimitrios Terzis, Nimisha Roy

The study describes a comprehensive methodology to evaluate X-Ray micro-computed tomography data from sand samples and to characterize their 3D microstructural properties. Fine and medium-grained sands are analyzed in their natural and bio-cemented states. ...

SPRINGER2023

A ductility criterion for bcc high entropy alloys

William Curtin, Binglun Yin, Eleanor Yi Kei Mak

A current goal driving alloy development is the identification of alloy compositions for high temperature applications but with the additional requirement of sufficient ductility at ambient temperatures. Multicomponent, single-phase, polycrystalline High E ...

PERGAMON-ELSEVIER SCIENCE LTD2021

Hybrid granular hydrogels: combining composites and microgels for extended ranges of material properties

Dominique Pioletti, Pierre-Etienne Bourban, Peyman Karami, Céline Samira Wyss

Developing hydrogels with optimal properties for specific applications is challenging as most of these properties, such as toughness, stiffness, swelling or deformability, are interrelated. The improvement of one property usually comes at the cost of anoth ...

2020

Corrosion behaviour of nitrided ferritic stainless steels for use in solid oxide fuel cell devices

Jan Van Herle, Manuel Bianco, Stéphane François Jean Poitel

Plasma nitriding was applied to ferritic stainless steel substrates to improve their performances as interconnects for solid oxide fuel cell devices. The samples underwent electrical conductivity test and SEM/EDS, TEM/EDS, environmental-SEM analyses. The f ...

2020

Long-term functionality of a soft electrode array for epidural spinal cord stimulation in a minipig model

Stéphanie Lacour, Grégoire Courtine, Giuseppe Schiavone, Jocelyne Bloch, Marco Capogrosso, Nicolas Vachicouras, Fabien Bertrand Paul Wagner, Florian Dylan Fallegger, Xiaoyang Kang, Beatrice Barra

Long-term biointegration of man-made neural interfaces is influenced by the mechanical properties of the implant materials. Substantial experimental work currently aims at replacing conventional hard implant materials with soft alternatives that can favour ...

IEEE2018

Self-Replenishing, Wear-Resistant and Anti-Sticking Surfaces Based on Liquid Impregnation of Microstructured Mesoporous α-AI₂O₃ [Alpha Alumina] Matrices

Sriharitha Rowthu

Fabrication of wear-resistant omniphobic surfaces is a persistent scientific challenge and essential for various applications such as in paint industries, fluid transport, antifouling, reduction of friction drag on ship hulls, and stain resistant textiles. ...

EPFL2016

New approach to low thermal conductivity of thermal barrier protection with improved mechanical integrity

Heinrich Hofmann, Paul Bowen, Abhishek Tewari

Layered ceramic systems with designed stacks of dense and porous layers were investigated as alternative for thermal barrier protection system (TBPs). This approach gives the possibility to obtain low thermal conductivity with the impact protection of dens ...

Elsevier2016

Synthesis of bone-like structured foams

Sandrine Gerber, Françoise Borcard

Here we present a processing route to produce multi-structured ceramic foams based on the combination of particle-stabilized foams with polymeric sponges to produce positive and negative templating structures. Polyester sponges are infiltrated with freshly ...

Elsevier Sci Ltd2013

Structure and the Electrical Properties of Pb(Zr,Ti)O3 - Zirconia Composites

Dragan Damjanovic, Marija Kosec

In this work, the effect of introducing tetragonal yttria-stabilized zirconia (TZ) particles in soft [Pb0.98Ba0.01][(Zr0.53Ti0.47)(0.98)Nb-0.02]O-3 (PZT) was investigated. Both microstructure and electrical properties of the PZT-xTZ (x = 0, 2, 5, 10, 20 vo ...

Wiley-Blackwell2012

Micro-tubular Solid Oxide Fuel Cells with Nickelate Cathode-support

Henning Lübbe

The shortage of natural resources, rising energy demands and global warming have created an urgent need for more efficient energy conversion devices and different energy resources to achieve a more sustainable and efficient economy. Solid Oxide Fuel Cells ...

EPFL2012

Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity

Barbora Bártová

Nanocrystalline (Y0.7Gd0.3)(2)O-3 powder, synthetised via polymer complex solution method, was compacted into 25 pellets applying high pressures (173-867 MPa) for 30 s that were subsequently sintered at different temperatures (800-1400 degrees C) for 18 h. ...

2012

Processing and Mechanical Properties of Alumina Reinforced Copper-Aluminum Composites

Carmen Krüger

Copper-based composites reinforced with alumina particles are produced by two different pro- cesses, namely gas pressure driven infiltration of a porous alumina preform and a two-step in-situ process developed in the course of this work. The resulting comp ...

EPFL2012

Controllable synthesis and characterization of alumina/MWNT nanocomposites

László Forró, Klara Hernadi

The aim of this work is to develop a controllable synthesis pathway which produces a stable alumina layer on the surface of carbon nanotubes by impregnation method. Precursor compounds such as aluminium isopropoxide and aluminium-acetylacetonate were used ...

2011

High temperature mechanical spectroscopy of yttria stabilized zirconia reinforced with carbon nanotubes

Daniele Mari, Robert Schaller, Mehdi Mazaheri

High temperature mechanical properties of zirconia reinforced with carbon-nanotubes (CNTs) are studied by mechanical spectroscopy. CNTs limit zirconia grain-boundary sliding (GBS) and consequently deformation. Concurrent grain-growth and plastic deformatio ...

Wiley2010

Enhanced electrical conductivity of ultrafine-grained 8Y(2)O(3) stabilized ZrO2 produced by two-step sintering technique

Mehdi Mazaheri

Two-step sintering of nanocrystalline zirconia powder stabilized with 8 mol% yttria resulted in remarkable enhancement of the electrical conductivity and significant suppression of the accelerated grain growth. The electrical conductivity of the nearly ful ...

2010

Calcium phosphate cement augmentation of cancellous bone screws can compensate for the absence of cortical fixation

Dominique Pioletti, Alexandre Terrier, Vincent Stadelmann

An obvious means to improve the fixation of a cancellous bone screw is to augment the surrounding bone with cement. Previous studies have shown that bone augmentation with Calcium Phosphate (CaP) cement significantly improves screw fixation. Nevertheless, ...

Elsevier2010

Simulation of volume changes of cement paste at early age

Karen Scrivener, Amor Guidoum, Ines Jaouadi

The evolution of early age mechanical properties and volume change of cement paste is performed through Finite Element analysis on a 3D computer-generated cement paste. The time evolution of the hydrating microstructure is generated by μic(mike), a vectori ...

2009

Electrophoretic deposition of multi-scale structured TiO2 surfaces

The long term fixation of biomedical implants constitutes an issue in the clinical praxis. Implant fixation can be improved by functionalizing its surface. In fact, the tissue response around an implant is conditioned by its surface morphological and chemi ...

EPFL2009

High-temperature mechanical loss and creep behavior of fine-grained zirconia-containing nano-sized reinforcements

Robert Schaller, Claudia Ionascu

Polycrystalline zirconia (3Y-TZP grade) specimens unreinforced and reinforced with multiwalled carbon nanotubes (MWCNTs) or silicon carbide whiskers (SiCws) were processed by powder metallurgy and studied by mechanical spectroscopy. The high-temperature me ...

2009