Publications by Raphaël Charvet

Related publications (12)

Yield surface of polyurethane and aluminium replicated foam

It has been proposed in the literature, based on theoretical considerations and on finite-element calculations, that all three stress tensor invariants govern the yield surface of cellular materials. Recent experiments on 75 gm pore size aluminium replicat ...

Elsevier2010

Compression testing spherical particles for strength: Theory of the meridian crack test and implementation for microscopic fused quartz

Andreas Mortensen, Václav Pejchal, Raphaël Charvet, Cyril Henri Dénéréaz, Goran Zagar

We show that uniaxial compression testing of spherical particles can give unambiguous access to their tensile strength as governed by surface flaws if one uses pairs of elasto-plastic platens, tailoring their hardness in order to control the relative area ...

2017

Influence of Testing Temperature on the Mechanical Performance of Brazed Conventionally and Additively Manufactured 316L Stainless Steel Joints

Andreas Mortensen, Raphaël Charvet

In this work, brazed joints between samples of 316L stainless steel (316LSS) are formed using the Ag155 brazing filler metal. As an additional aspect of the investigation, the joints combine stainless steel formed by conventional processing and by additive ...

Wiley2025

Capillarity in pressure infiltration: improvements in characterization of high-temperature systems

Andreas Mortensen, Ludger Weber, Raphaël Charvet, Alain Léger

In the pressure infiltration of metal matrix composites, molten metal is injected under external pressure into a porous preform of the reinforcing material. Equilibrium capillary parameters characterizing wetting for this process are summarized in plots of ...

Springer Verlag2012

Small-scale metal castings, small-scale metal/transparent composite structures and process to produce same

Andreas Mortensen, Yves Bellouard, Raphaël Charvet, Cyril Henri Dénéréaz

The method comprises at least the following steps: - exposing a substrate to focused laser irradiation at a preselected series of locations that trace a subset of the substrate volume that is connected to the surface of the substrate; some subsets of subst ...

2017

Multiaxial yield behaviour of Al replicated foam

Andreas Mortensen, Raphaël Charvet

Multiaxial experiments are performed on replicated aluminium foam using a custom-built apparatus. The foam structure is isotropic, and features open monomodal pores 75 mu m in average diameter. Plane stress (sigma(1), sigma(2), sigma(3) = 0) and axisymmetr ...

Elsevier2011

The Electronic Role of the TiO2 Light-Scattering Layer in Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Péter Kalman Péchy, Pascal Comte, Paul Liska, Raphaël Charvet

2007

Photovoltaic Characterization of Dye-sensitized Solar Cells: Effect of Device Masking on Conversion Efficiency

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Péter Kalman Péchy, Pascal Comte, Paul Liska, Raphaël Charvet

2006

3D metal freeform micromanufacturing

Andreas Mortensen, Yves Bellouard, Raphaël Charvet, Léa Deillon, Fatmah Ebrahim, Tao Yang, Luciano Borasi, Enrico Casamenti, Cyril Henri Dénéréaz, Sacha Jérémy Florentin Pollonghini

Despite remarkable progress made in recent years, producing freeform three-dimensional micro-components out of copper, silver or gold and their alloys remains an engineering challenge: current processes are either too slow to be economically viable, or pro ...

2021

Amphiphilic Ruthenium Sensitizer with 4,4'-Diphosphonic Acid-2,2'-bipyridine as Anchoring Ligand for Nanocrystalline Dye Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Jacques-Edouard Moser, Pascal Comte, Peng Wang, Raphaël Charvet

2004

Enhance the performance of dye-Sensitized photoelectrochemical cells by Co-grafting amphiphilic sensitizer and hexadecyl malonic acid on TiO2 nanocrystals

Michael Graetzel, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Pascal Comte, Peng Wang, Raphaël Charvet

2003

Control of dark current in photoelectrochemical (TiO2/I--I3-) and dye-sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Péter Kalman Péchy, Pascal Comte, Paul Liska, Udo Bach, Raphaël Charvet

Royal Society of Chemistry2005