Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers
In the field of non-oxide ceramic composites, and by using the polymer-derived ceramic route, understanding the relationship between the thermal behaviour of the preceramic polymers and their structure, leading to the mechanisms involved, is crucial. To investigate the role of Zr on the fabrication...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8306986/ https://www.ncbi.nlm.nih.gov/pubmed/34300819 http://dx.doi.org/10.3390/ma14143901 |
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author | Bouzat, Fabien Lucas, Romain Leconte, Yann Foucaud, Sylvie Champavier, Yves Coelho Diogo, Cristina Babonneau, Florence |
author_facet | Bouzat, Fabien Lucas, Romain Leconte, Yann Foucaud, Sylvie Champavier, Yves Coelho Diogo, Cristina Babonneau, Florence |
author_sort | Bouzat, Fabien |
collection | PubMed |
description | In the field of non-oxide ceramic composites, and by using the polymer-derived ceramic route, understanding the relationship between the thermal behaviour of the preceramic polymers and their structure, leading to the mechanisms involved, is crucial. To investigate the role of Zr on the fabrication of ZrC–SiC composites, linear or hyperbranched polycarbosilanes and polyzirconocarbosilanes were synthesised through either “click-chemistry” or hydrosilylation reactions. Then, the thermal behaviours of these polymeric structures were considered, notably to understand the impact of Zr on the thermal path going to the composites. The inorganic materials were characterised by thermogravimetry-mass spectrometry (TG-MS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). To link the macromolecular structure to the organisation involved during the ceramisation process, eight temperature domains were highlighted on the TG analyses, and a four-step mechanism was proposed for the polymers synthesised by a hydrosilylation reaction, as they displayed better ceramic yields. Globally, the introduction of Zr in the polymer had several effects on the temperature fragmentation mechanisms of the organometallic polymeric structures: (i) instead of stepwise mass losses, continuous fragment release prevailed; (ii) the stability of preceramic polymers was impacted, with relatively good ceramic yields; (iii) it modulated the chemical composition of the generated composites as it led, inter alia, to the consumption of free carbon. |
format | Online Article Text |
id | pubmed-8306986 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-83069862021-07-25 Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers Bouzat, Fabien Lucas, Romain Leconte, Yann Foucaud, Sylvie Champavier, Yves Coelho Diogo, Cristina Babonneau, Florence Materials (Basel) Article In the field of non-oxide ceramic composites, and by using the polymer-derived ceramic route, understanding the relationship between the thermal behaviour of the preceramic polymers and their structure, leading to the mechanisms involved, is crucial. To investigate the role of Zr on the fabrication of ZrC–SiC composites, linear or hyperbranched polycarbosilanes and polyzirconocarbosilanes were synthesised through either “click-chemistry” or hydrosilylation reactions. Then, the thermal behaviours of these polymeric structures were considered, notably to understand the impact of Zr on the thermal path going to the composites. The inorganic materials were characterised by thermogravimetry-mass spectrometry (TG-MS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). To link the macromolecular structure to the organisation involved during the ceramisation process, eight temperature domains were highlighted on the TG analyses, and a four-step mechanism was proposed for the polymers synthesised by a hydrosilylation reaction, as they displayed better ceramic yields. Globally, the introduction of Zr in the polymer had several effects on the temperature fragmentation mechanisms of the organometallic polymeric structures: (i) instead of stepwise mass losses, continuous fragment release prevailed; (ii) the stability of preceramic polymers was impacted, with relatively good ceramic yields; (iii) it modulated the chemical composition of the generated composites as it led, inter alia, to the consumption of free carbon. MDPI 2021-07-13 /pmc/articles/PMC8306986/ /pubmed/34300819 http://dx.doi.org/10.3390/ma14143901 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bouzat, Fabien Lucas, Romain Leconte, Yann Foucaud, Sylvie Champavier, Yves Coelho Diogo, Cristina Babonneau, Florence Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers |
title | Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers |
title_full | Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers |
title_fullStr | Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers |
title_full_unstemmed | Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers |
title_short | Formation of ZrC–SiC Composites from the Molecular Scale through the Synthesis of Multielement Polymers |
title_sort | formation of zrc–sic composites from the molecular scale through the synthesis of multielement polymers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8306986/ https://www.ncbi.nlm.nih.gov/pubmed/34300819 http://dx.doi.org/10.3390/ma14143901 |
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