High-temperature evolution of diamond-SiC composites
Diamond-SiC composites are attractive for improving the catastrophic fracture behaviour of SiC. However, fundamental knowledge is missing about the structure of this system and the mechanism of diamond graphitization. We used spark plasma sintering to study the diamond-Si-SiC system between 1600 and...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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University of Novi Sad
2022-03-01
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| Series: | Processing and Application of Ceramics |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312201069B.pdf |
| _version_ | 1819023574679158784 |
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| author | Bódis Eszter Cora Ildikó Fogarassy Zsolt Veres Miklós Németh Péter |
| author_facet | Bódis Eszter Cora Ildikó Fogarassy Zsolt Veres Miklós Németh Péter |
| author_sort | Bódis Eszter |
| collection | DOAJ |
| description | Diamond-SiC composites are attractive for improving the catastrophic fracture behaviour of SiC. However, fundamental knowledge is missing about the structure of this system and the mechanism of diamond graphitization. We used spark plasma sintering to study the diamond-Si-SiC system between 1600 and 2000°C in the function of nanocrystalline (ND) and microcrystalline (MD) diamond addition as well as the quantity of Sibonding phase. Increasing sintering temperature induces intense graphitization and formation of nano-onions, few-layered graphene and well-ordered graphite in the prepared composites at elevated temperature. High resolution transmission electron microscopy study demonstrates the occurrence of the previously erroneously identified 5H-SiC polytype in the samples prepared at 2000°C. Regardless of Si and diamond contents, SiC formation is not confirmed even at high temperature. |
| first_indexed | 2024-12-21T04:41:04Z |
| format | Article |
| id | doaj.art-9139d37359d741df9cc6b8f48951f33a |
| institution | Directory Open Access Journal |
| issn | 1820-6131 2406-1034 |
| language | English |
| last_indexed | 2024-12-21T04:41:04Z |
| publishDate | 2022-03-01 |
| publisher | University of Novi Sad |
| record_format | Article |
| series | Processing and Application of Ceramics |
| spelling | doaj.art-9139d37359d741df9cc6b8f48951f33a2022-12-21T19:15:41ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61312406-10342022-03-01161697710.2298/PAC2201069BHigh-temperature evolution of diamond-SiC compositesBódis Eszter0Cora Ildikó1Fogarassy Zsolt2Veres Miklós3Németh Péter4Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Budapest, HungaryInstitute of Technical Physics and Materials Science, Centre for Energy Research, Eötvös Loránd Research Network, Budapest, HungaryInstitute of Technical Physics and Materials Science, Centre for Energy Research, Eötvös Loránd Research Network, Budapest, HungaryInstitute for Solid State Physics and Optics, Wigner Research Centre for Physics, Eötvös Loránd Research Network, Budapest, HungaryInstitute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network, Budapest, Hungary + Department of Earth and Environmental Sciences, University of Pannonia, HungaryDiamond-SiC composites are attractive for improving the catastrophic fracture behaviour of SiC. However, fundamental knowledge is missing about the structure of this system and the mechanism of diamond graphitization. We used spark plasma sintering to study the diamond-Si-SiC system between 1600 and 2000°C in the function of nanocrystalline (ND) and microcrystalline (MD) diamond addition as well as the quantity of Sibonding phase. Increasing sintering temperature induces intense graphitization and formation of nano-onions, few-layered graphene and well-ordered graphite in the prepared composites at elevated temperature. High resolution transmission electron microscopy study demonstrates the occurrence of the previously erroneously identified 5H-SiC polytype in the samples prepared at 2000°C. Regardless of Si and diamond contents, SiC formation is not confirmed even at high temperature.http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312201069B.pdfsic-diamond compositesnanosized and microsized diamondsps5h-sic phase |
| spellingShingle | Bódis Eszter Cora Ildikó Fogarassy Zsolt Veres Miklós Németh Péter High-temperature evolution of diamond-SiC composites Processing and Application of Ceramics sic-diamond composites nanosized and microsized diamond sps 5h-sic phase |
| title | High-temperature evolution of diamond-SiC composites |
| title_full | High-temperature evolution of diamond-SiC composites |
| title_fullStr | High-temperature evolution of diamond-SiC composites |
| title_full_unstemmed | High-temperature evolution of diamond-SiC composites |
| title_short | High-temperature evolution of diamond-SiC composites |
| title_sort | high temperature evolution of diamond sic composites |
| topic | sic-diamond composites nanosized and microsized diamond sps 5h-sic phase |
| url | http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312201069B.pdf |
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