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On the stoichiometry of zirconium carbide
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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7156448/ https://www.ncbi.nlm.nih.gov/pubmed/32286368 http://dx.doi.org/10.1038/s41598-020-63037-0 |
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author | Gasparrini, Claudia Rana, Dhan-sham Le Brun, Niccolò Horlait, Denis Markides, Christos N. Farnan, Ian Lee, William E. |
author_facet | Gasparrini, Claudia Rana, Dhan-sham Le Brun, Niccolò Horlait, Denis Markides, Christos N. Farnan, Ian Lee, William E. |
author_sort | Gasparrini, Claudia |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-7156448 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-71564482020-04-19 On the stoichiometry of zirconium carbide Gasparrini, Claudia Rana, Dhan-sham Le Brun, Niccolò Horlait, Denis Markides, Christos N. Farnan, Ian Lee, William E. Sci Rep Article 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. Nature Publishing Group UK 2020-04-14 /pmc/articles/PMC7156448/ /pubmed/32286368 http://dx.doi.org/10.1038/s41598-020-63037-0 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Gasparrini, Claudia Rana, Dhan-sham Le Brun, Niccolò Horlait, Denis Markides, Christos N. Farnan, Ian Lee, William E. On the stoichiometry of zirconium carbide |
title | On the stoichiometry of zirconium carbide |
title_full | On the stoichiometry of zirconium carbide |
title_fullStr | On the stoichiometry of zirconium carbide |
title_full_unstemmed | On the stoichiometry of zirconium carbide |
title_short | On the stoichiometry of zirconium carbide |
title_sort | on the stoichiometry of zirconium carbide |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7156448/ https://www.ncbi.nlm.nih.gov/pubmed/32286368 http://dx.doi.org/10.1038/s41598-020-63037-0 |
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