Ludger Weber

Cette personne n’est plus à l’EPFL

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Publications associées (62)

Infiltration of tin bronze into alumina particle beds: influence of alloy chemistry on drainage curves

Andreas Mortensen, Ludger Weber, Alain Léger

The wetting of angular alumina particle preforms by Cu-Sn alloys is investigated by means of pressure infiltration experiments conducted at 1150 A degrees C, using a system enabling dynamic and precise measurements of the metal volume injected into the pre ...

Springer Verlag2014

Qualitative link between work of adhesion and thermal conductance of metal/diamond interfaces

Christian Monachon, Ludger Weber, Efthimios Kaxiras, Georg Schusteritsch

We report Time-Domain ThermoReflectance experiments measuring the Thermal Boundary Conductance (TBC) of interfaces between diamond and metal surfaces, based on samples consisting of [111] diamond substrates with hydrogen or with sp2 carbon surface terminat ...

Amer Inst Physics2014

Thermal boundary conductance between refractory metal carbides and diamond

Christian Monachon, Ludger Weber

The thermal boundary conductance (TBC) between thin films of Cr, Mo, Nb and W and diamond substrates has been measured using time domain thermoreflectance before and after a high-vacuum heat treatment at 800 degrees C for 2 h. While no signs of carbide for ...

Elsevier2014

The ESPRI project: astrometric exoplanet search with PRIMA I. Instrument description and performance of first light observations

Ludger Weber, Yvan Michellod

Context. The ESPRI project relies on the astrometric capabilities offered by the PRIMA facility of the Very Large Telescope Interferometer for discovering and studying planetary systems. Our survey consists of obtaining high-precision astrometry for a larg ...

Edp Sciences S A2013

Influence of diamond surface termination on thermal boundary conductance between Al and diamond

Christian Monachon, Ludger Weber

The effect of diamond surface treatment on the Thermal Boundary Conductance (TBC) between Al and diamond is investigated. The treatments consist in either of the following: exposition to a plasma of pure Ar, Ar:H and Ar:O, and HNO3:H2SO4 acid dip for vario ...

American Institute of Physics2013

Composite material comprising a precious metal, manufacturing process and use of such a material

Andreas Mortensen, Ludger Weber, Reza Tavangar Hamzehkolaei, Senad Hasanovic

Composite material combining: - a precious metal or an alloy containing a precious metal, - and a boron-based ceramic having a melting point above that of said precious metal and a density at most equal to 4 g/cm3. ...

2012

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

Andreas Mortensen, Ludger Weber, Raphaël Charvet, Alain Léger, Willy Dufour, 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

Solid solubility of germanium in silver

Ludger Weber, Hamed Kazemi

The solid solubility of germanium in silver has been measured in the temperature range of 520 K to 913 K via measurements of density and of electrical conductivity of two near-eutectic Ag-Ge alloys. The atomic fraction of germanium in solid solution varied ...

Elsevier2012

Platinum based alloys

Ludger Weber

An article made of an alloy of the general formula Pt1-a-bMa(B1-xMdx)b in which i) M stands for one or a mixture of metallic element(s) of the group Zr, Ti, Fe, Ni, Co, Cu, Pd, Ag, Al ii) Md stands for one or a mixture of several metalloids of the group Si ...

2012

Thermal boundary conductance of transition metals on diamond

Christian Monachon, Ludger Weber

An experimental process that was used to obtain a direct measurement of Thermal Boundary Conductance (TBC) between a diamond substrate and several transition metals, deposited by sputtering, is described. Using Time-Domain ThermoReflectance (TDTR), the cri ...

2012

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The ESPRI project: astrometric exoplanet search with PRIMA I. Instrument description and performance of first light observations

Ludger Weber, Yvan Michellod

Edp Sciences S A2013