Hervé Plaisantin
Snecma
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Publication
Featured researches published by Hervé Plaisantin.
Chemistry: A European Journal | 2017
Marion Schmidt; Charlotte Durif; Emanoelle Diz Acosta; Chrystelle Salameh; Hervé Plaisantin; Philippe Miele; Rénal Backov; Ricardo Antonio Francisco Machado; Christel Gervais; Johan Alauzun; G. Chollon; Samuel Bernard
The design of Si-(B)-C materials is investigated, with detailed insight into the precursor chemistry and processing, the precursor-to-ceramic transformation, and the ceramic microstructural evolution at high temperatures. In the early stage of the process, the reaction between allylhydridopolycarbosilane (AHPCS) and borane dimethyl sulfide is achieved. This is investigated in detail through solid-state NMR and FTIR spectroscopy and elemental analyses for Si/B ratios ranging from 200 to 30. Boron-based bridges linking AHPCS monomeric fragments act as crosslinking units, extending the processability range of AHPCS and suppressing the distillation of oligomeric fragments during the low-temperature pyrolysis regime. Polymers with low boron contents display appropriate requirements for facile processing in solution, leading to the design of monoliths with hierarchical porosity, significant pore volume, and high specific surface area after pyrolysis. Polymers with high boron contents are more appropriate for the preparation of dense ceramics through direct solid shaping and pyrolysis. We provide a comprehensive study of the thermal decomposition mechanisms, and a subsequent detailed study of the high-temperature behavior of the ceramics produced at 1000 °C. The nanostructure and microstructure of the final SiC-based ceramics are intimately linked to the boron content of the polymers. B4 C/C/SiC nanocomposites can be obtained from the polymer with the highest boron content.
Plasma Chemistry and Plasma Processing | 2014
Julien Souquet-Grumey; Philippe Ayrault; Olivier Heintz; Joël Barrault; Jean-Michel Tatibouët; Hervé Plaisantin; Jacques Thebault; Sabine Valange; Elodie Fourré
AbstractNovel two-dimensional carbon–carbon composites made of carbon nanofibers (CNFs) supported on a carbon preform were functionalized by non thermal plasma treatment (room temperature, atmospheric pressure, humid air), before being used as supports for metallic cobalt nanoparticles. It was shown that the degree of functionalization of the carbon nanofibers depends on the plasma power input, the treatment time and the CNF loading. The size of the cobalt nanoparticles generated after subsequent reduction of the Co-containing plasma treated CNF/C composites under hydrogen flow seems to be independent of the amount of supported cobalt. Changes in surface characteristics were analyzed using thermogravimetric analyses coupled to a mass spectrometer, X-ray photoelectron spectroscopy analyses and Raman spectroscopy. Transmission electron microscopy was used to complementary characterize the final size, dispersion and location of the so generated Co nanoparticles.
Composites Science and Technology | 2001
Hervé Plaisantin; René Pailler; Alain Guette; Gérard Daudé; Michel Petraud; B Barbe; Marc Birot; J.-P. Pillot; Pierre Olry
Journal of Materials Science | 2006
Hervé Plaisantin; René Pailler; Alain Guette; Marc Birot; J.-P. Pillot; Gérard Daudé; Pierre Olry
Surface & Coatings Technology | 2010
A. Delcamp; L. Maillé; B. Rufino; S. Mazerat; René Pailler; Alain Guette; Patrick Weisbecker; Hervé Plaisantin; Eric Philippe; Sylvie Loison
Archive | 2009
Hervé Plaisantin; René Pailler; Adrien Delcamp; Eric Philippe
Journal of Analytical and Applied Pyrolysis | 2008
Marc Birot; Jean-Paul Pillot; Gérard Daudé; René Pailler; Alain Guette; Hervé Plaisantin; Sylvie Loison; Pierre Olry; Patrick Simon; Christine Labrugère; Michel Petraud
Journal of The European Ceramic Society | 2018
Stéphane Mazerat; Adrien Delcamp; René Pailler; Jacques Lamon; Hervé Plaisantin
Archive | 2014
Jacques Thebault; Julien Souquet-Grumey; Hervé Plaisantin; Sabine Valange; Jean-Michel Tatibouët; Joël Barrault
Archive | 2012
Jacques Thebault; Julien Souquet-Grumey; Hervé Plaisantin; Sabine Valange; Jean-Michel Tatibouët; Joël Barrault