Concept

Composé intermétallique

Publications associées (245)

Etude de l'effet du brassage électromagnétique sur les microstructures d'alliages cuivreux

In order to eliminate internal and surface defects, which appear in the ingots during continuous casting of metallic alloys, homogeneous and fine structures are often required. Therefore, when the adjunction of inoculant substances is not possible, the ele ...

EPFL2003

The ZONMET thermodynamic and kinetic model of metal condensation

Anders Meibom

The ZONMET model of metal condensation is a FORTRAN computer code that calculates condensation with partial isolation-type equilibrium partitioning of the 19 most abundant elements among 203 gaseous and 488 condensed phases and growth in the nebula of a zo ...

2003

Structured Au/FeOx/C catalysts for low temperature CO oxidation

Albert Renken, Philippe Buffat, Lioubov Kiwi, Elena Suvorova Buffat

Innovative structured catalysts based on nanoparticles of gold supported on activated carbon fibers (ACF) in the form of woven fabrics are presented for low-temperature CO oxidation. Gold was deposited by adsorption from aqueous solution of ethylenediamine ...

2002

Hot Tear formation and coalescence observations in organic alloys

Michel Rappaz, Jean-Marie Drezet, Piero Daniele Grasso

Hot tear formation has been observed during the solidification of a succinonitrile–acetone (SCN-acetone) alloy by pulling the columnar dendrites in the transverse direction with a stick. It is observed that the cracking of the mushy zone (hot tears) always ...

TMS Publ.2002

Analysis of Ni-Zn batteries performance for hybrid light-vehicles applications

Mario Paolone, Carlo Alberto Nucci

Recent progresses in the technology of the Ni-Zn batteries have a direct influence on the improvement of the performance of hybrid electric vehicles. This paper evaluates the progresses of these batteries in particular for application on hybrid light vehic ...

IEEE2002

Liquid metal embrittlement studies on model systems wiht respect to the spallation target technology: the importance of nanometre-thick films

Vincent Laporte

Liquid metal embrittlement (LME) is illustrated on the Cu-Bi and Cu-PbBi systems at 300 C using either constant strain-rate tests at 10(-4) s(-1) or constant load tests at 25% of yield stress. Intergranular penetration was studied in the Ni-Bi system at 70 ...

2002

STUDY AND MODELING OF HOT TEARING FORMATION

Michel Rappaz, Jean-Marie Drezet

As for most of the topics in the field of solidification, Mert Flemings has always pioneered new ideas. While much of the understanding of hot tearing formation was already known about 30 years ago, he devised with Metz an interesting apparatus for studyin ...

TMS Public.2001

Couche épaisse de nitrure de Gallium ou de nitrure mixte de Gallium et d'un autre métal, procédé de préparation, et dispositif électronique ou optoélectronique comprenant une telle couche

Nicolas Grandjean

The invention concerns a monocrystalline coating crack-free coating of gallium nitride or mixed gallium nitride and another metal, on a substrate likely to cause extensive stresses in the coating, said substrate being coated with a buffer layer, wherein: a ...

2001

Spectroscopic indications of polaronic carriers in the quasi-one-dimensional conductor (TaSe4)(2)I

Giorgio Margaritondo, Marco Grioni, Helmuth Berger, Luca Perfetti

Angle-resolved photoemission (ARPES) on the quasi-one-dimensional conductor (TaSe4)(2)I shows a hidden Fermi-surface crossing in its metallic state and the opening of a Peierls gap at low temperatures, The underlying quasiparticles have vanishing spectral ...

2001

A novel perovskite-like Ta-bronze KTa1+zO3: preparation, stoichiometry, conductivity and crystal structure studies

Gervais Chapuis, Alla Arakcheeva

A new cubic Ta-bronze (1) KTa1+z+(5-delta)O3 [z similar or equal to 0.107 (3)] was obtained on a cathode by molten salt electrolysis of the system K2TaOF5-K3TaO2F4-(KF + NaF + LiF)(cutectic). Black, metallic cubic crystals of (1) are formed together with t ...

2001

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