Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Bernard Granier"'
Autor:
Jorge Cruz Fernandes, Bernard Granier, Teresa Magalhães, Nobumitsu Shohoji, Fernando A. Costa Oliveira, Luís Guerra Rosa, Gilles Peraudeau
Publikováno v:
MATERIALS TRANSACTIONS. 53:537-545
In recent attempts of reacting d-group transition metals with N2 gas under irradiation of concentrated solar beam at temperatures around 2000°C using a standard setup with graphite specimen holder, reaction products obtained were carbo-nitrides rath
Autor:
Bernard Granier, Jorge Cruz Fernandes, Nobumitsu Shohoji, Teresa Magalhães, Fernando A. Costa Oliveira, Luís Guerra Rosa, Gilles Peraudeau
Publikováno v:
MATERIALS TRANSACTIONS. 52:2083-2090
In a preceding work, we reported attempts of synthesizing nitride of d-group transition metals including Ti, V, Nb and Ta using a solar furnace at PROMES-CNRS. In standard solar furnace experimental setup, graphite crucible is used as the sample hold
Autor:
Luís Guerra Rosa, Gilles Peraudeau, Nobumitsu Shohoji, Bernard Granier, Fernando A. Costa Oliveira, Jorge Cruz Fernandes, Teresa Magalhães
Publikováno v:
MATERIALS TRANSACTIONS. 52:719-727
Reactions of d-group transition metals including Ti, V, Nb and Ta with N2 gas were investigated at target temperature of 2000°C under heating with concentrated solar beam at PROMES-CNRS in Odeillo (France). In the typical experimental setup using gr
Autor:
Luís Guerra Rosa, Bernard Granier, Jorge Cruz Fernandes, Nobumitsu Shohoji, Fernando A. Costa Oliveira, Teresa Magalhães
Publikováno v:
MATERIALS TRANSACTIONS. 50:2813-2819
There are a number of distinguishable carbide phases in the binary Mo-C system depending on C/Mo ratio as well as on temperature. In a preceding work published in this journal, carbide formation performance for graphite/molybdenum powder mixtures at
Autor:
Jorge Cruz Fernandes, Luís Guerra Rosa, Bernard Granier, Nobumitsu Shohoji, Fernando A. Costa Oliveira, Jean-Marie Badie
Publikováno v:
Materials Science Forum. :993-997
Synthesis of single-phase tungsten sub-carbide W2C was attempted by heating pellets made out of a source of carbon (graphite-G) and W powders with G/W atom ratio between 0.35 and 0.50 to two target temperatures, namely 1600°C and 1900°C in an argon
Autor:
Teresa Magalhães, Jorge Cruz Fernandes, Fernando A. Costa Oliveira, Nobumitsu Shohoji, Bernard Granier, Jean-Marie Badie, Luís Guerra Rosa
Publikováno v:
MATERIALS TRANSACTIONS. 49:2673-2678
A solar furnace at PROMES-CNRS in Odeillo (France) is with very unique capacity of heating the specimen material from ambient temperature to a target temperature exceeding 2000°C within fractions of a second in arbitrary gas environment with pressur
Autor:
Jean-Marie Badie, Jorge Cruz Fernandes, Fernando A. Costa Oliveira, Luís Guerra Rosa, Bernard Granier, Nobumitsu Shohoji
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 25:351-357
Synthesis of single-phase tungsten sub-carbide phase W 2 C was attempted in inert Ar gas atmosphere started from compacted powder mixtures of graphite (G) and tungsten (W) with controlled mole ratios between 0.35 and 0.50 under solar radiation heatin
Autor:
Fernando A. Costa Oliveira, Jorge Cruz Fernandes, Nobumitsu Shohoji, Luís Guerra Rosa, Bernard Granier, Jean-Marie Badie
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 25:220-225
There are a number of Mo–C binary phase diagrams available and they are not necessarily in agreement with each other. Anyway, in none of them, presence of mono-carbide MoC is reported at temperatures between 1660 °C and 1150 °C. In this intermedi
Autor:
Jorge Cruz Fernandes, Bernard Granier, Jean-Marie Badie, Fernando A. Costa Oliveira, Luís Guerra Rosa, Nobumitsu Shohoji
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 25:101-106
At around 1600 °C, stable phase in W–C binary system being in equilibrium with excess carbon is acknowledged to be mono-carbide WC. Nevertheless, during carbide formation from mixed powders of tungsten and excess carbon (C/W atom ratio: 2) in iner
Autor:
Susana Dias, Jean-Marie Badie, Bernard Granier, Jorge Cruz Fernandes, Fernando A. Costa Oliveira, Luís Guerra Rosa, Nobumitsu Shohoji
Publikováno v:
MATERIALS TRANSACTIONS. 48:919-923
In equilibrium binary W-C system, mono-carbide WC is acknowledged as the stable phase under presence of excess free carbon up to temperature 2700°C whereas sub-carbide W 2 C would form between 1250°C and 2700°C under the carbon-deficiency conditio