GASPARRINI, Claudia; RANA, Dhan-Sham; LE BRUN, Niccolò; HORLAIT, Denis; MARKIDES, Christos; FARNAN, Ian; LEE, William

doi:10.1038/s41598-020-63037-0

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

GASPARRINI, Claudia
Imperial College London

RANA, Dhan-Sham
Department of Earth Sciences [University of Cambridge]

LE BRUN, Niccolò
Imperial College London

Langue

Article de revue

Ce document a été publié dans

Scientific Reports. 2020-12, vol. 10, n° 1, p. 6347

Nature Publishing Group

Résumé en anglais

the dependencies of the enhanced thermomechanical properties of zirconium carbide (Zrc x) with sample purity and stoichiometry are still not understood due to discrepancies in the literature. Multiple researchers have recently reported a linear relation between the carbon to zirconium atomic ratio (c/Zr) and the lattice parameter, in contrast with a more established relationship that suggests that the lattice parameter value attains a maximum value at a C/Zr ~ 0.83. In this study, the relationship between C/Zr atomic ratio and the lattice parameter is critically assessed: it is found that recent studies reporting the thermophysical properties of Zrc x have unintentionally produced and characterised samples containing zirconium oxycarbide. to avoid such erroneous characterization of Zrc x thermophysical properties in the future, we propose a method for the accurate measurement of the stoichiometry of ZrC x using three independent experimental techniques, namely: elemental analysis, thermogravimetric analysis and nuclear magnetic resonance spectroscopy. Although a large scatter in the results (Δc/Zr = 0.07) from these different techniques was found when used independently, when combining the techniques together consistent values of x in Zrc x were obtained.< Réduire

Métadonnées

Licence d’utilisation du document

On the stoichiometry of zirconium carbide

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche