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- W4387452967 abstract "ABSTRACTIt is significant to develop the production processes of Zirconium Carbide (ZrC) nanoparticles due to its superior properties. In this study, self-propagating high-temperature synthesis (SHS) followed by an acid leaching route was used to produce ZrC powder. ZrO2 was used as the zirconium source, C black as the carbon source and Mg as reductant. After modelling thermodynamically with the FactSage 7.1 software in terms of adiabatic temperature and possible phases, SHS processes were carried out with varying reductant stoichiometry (90%, 100%, 110%, 120%) and applying chemical treatment with HCl leaching for purification. The obtained products were characterised by XRD and SEM-EDS analysis. The optimum reductant stoichiometry for the production of ZrC was determined as 110%. As a result of the leaching processes, it was revealed that ZrC powders with an average particle size of 320 nm and containing a small amount of oxide residues could be synthesised. Compared to carbothermal reduction, which is the main production method of the material, the desired compounds were synthesised with much lower energy consumption and in much finer particles.Il est important de développer les procédés de production de nanoparticules de carbure de zirconium (ZrC) en raison de ses propriétés supérieures. Dans cette étude, on a utilisé une synthèse à haute température auto-propagée (SHS) suivie d’une voie de lixiviation acide pour produire de la poudre de ZrC. On a utilisé ZrO2 comme source de zirconium, du noir de carbone comme source de carbone et du Mg comme agent réducteur. Après une modélisation thermodynamique avec le logiciel FactSage 7.1 en termes de la température adiabatique et des phases possibles, on a effectué des procédés SHS avec une stœchiométrie variable de l’agent réducteur (90%, 100%, 110%, 120%) et en appliquant un traitement chimique avec lixiviation HCl pour la purification. On a caractérisé les produits obtenus par XRD et analyse SEM-EDS. La stœchiométrie optimale de l’agent réducteur pour la production de ZrC a été déterminée à 110%. À la suite des procédés de lixiviation, il a été révélé que l’on pouvait synthétiser des poudres de ZrC d’une taille moyenne de particules de 320 nm et contenant une petite quantité de résidus d’oxyde. Par rapport à la réduction carbothermique, qui est la principale méthode de production du matériau, on a synthétisé les composés désirés avec une consommation d’énergie bien inférieure et en particules beaucoup plus fines.KEYWORDS: Zirconium Carbidepowder synthesismagnesiothermic reductioncombustion synthesisnanopowder Disclosure statementNo potential conflict of interest was reported by the author(s)." @default.
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- W4387452967 date "2023-10-09" @default.
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- W4387452967 title "Effect of Mg stoichiometry on self-propagating high temperature synthesis (SHS) of ZrC nanoparticles in ZrO <sub>2</sub> -Mg-C system" @default.
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- W4387452967 doi "https://doi.org/10.1080/00084433.2023.2266344" @default.
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