Publications by Raphaël Charvet

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

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

3D metal freeform micromanufacturing

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

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

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

Cyril Dénéréaz, Andreas Mortensen, Raphaël Charvet, Václav Pejchal, 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

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

Yves Bellouard, Cyril Dénéréaz, Andreas Mortensen, Raphaël Charvet

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

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

Willy Dufour, Andreas Mortensen, Ludger Weber, Raphaël Charvet, Alain Léger, Claudio Bacciarini, Noelia Rojo Calderon

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

Multiaxial yield behaviour of Al replicated foam

Willy Dufour, Andreas Mortensen, Etienne Combaz, Raphaël Charvet, Claudio Bacciarini

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

Yield surface of polyurethane and aluminium replicated foam

Willy Dufour, Andreas Mortensen, Etienne Combaz, Raphaël Charvet, Claudio Bacciarini

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

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

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

2004

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

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

2003

Raphaël Charvet

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