Synthesis of tungsten nanopowders: Comparison of milling, SHS, MASHS and milling-induced chemical processes

Sarah Dine (1) , Sara Aïd (1) , Karim Ouaras (1) , Veronique Malard (2) , Michaël Odorico (2) , Nathalie Herlin-Boime (3) , Aurélie Habert (3) , Adèle Gerbil-Margueron (3) , Christian Grisolia (4) , Jacques Chene (5) , Grégory Pieters (5) , Bernard Rousseau (5) , Dominique Vrel (1)

1 LSPM - Laboratoire des Sciences des Procédés et des Matériaux
2 BIAM - Institut de Biosciences et Biotechnologies d'Aix-Marseille (ex-IBEB)
3 LEDNA - Laboratoire Edifices Nanométriques
4 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
5 SCBM - Service de Chimie Bio-Organique et de Marquage

Synthesis of tungsten nanopowders was studied using milling of micrometric tungsten, then using the WO3–Mg thermitic reaction, using SHS (Self-propagating High-temperature Synthesis), milling induced chemical reaction (MICR), and MASHS (Mechanically Activated SHS). Reactions are studied by measuring temperature and pressure inside the milling jar (during MICR), or by analyzing the temperature profile along the sample during the reaction propagation by infrared thermography (SHS, MASHS). After reaction, samples were analyzed by AFM or SEM, by XRD, and BET. MASHS seems to possess optimum conditions with a pre-milling before SHS of 10 min, which yielded the highest tungsten purity, together with a grain size corresponding to our aim.

Domaines: Matériaux

Sarah Dine, Sara Aïd, Karim Ouaras, Veronique Malard, Michaël Odorico, et al.. Synthesis of tungsten nanopowders: Comparison of milling, SHS, MASHS and milling-induced chemical processes. Advanced Powder Technology, 2015, 26, pp.1300-1305. ⟨10.1016/j.apt.2015.07.004⟩. ⟨hal-01228560⟩