Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC Composites
This paper presents the results of microstructural analysis of novel preceramic paper-derived SiCf/SiC composites fabricated by spark plasma sintering. The sintering temperature and pressure were 2100/2200 °C and 60/100 MPa, respectively. The content of fibers in the composites was approx. 10 wt %....
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2021-11-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/22/6737 |
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| author | Ke Li Egor Kashkarov Hailiang Ma Ping Fan Qiaoli Zhang Peng Zhang Jilong Zhang Zhaohui Wu Larissa Wahl Roman Laptev Andrey Lider Nahum Travitzky Daqing Yuan |
| author_facet | Ke Li Egor Kashkarov Hailiang Ma Ping Fan Qiaoli Zhang Peng Zhang Jilong Zhang Zhaohui Wu Larissa Wahl Roman Laptev Andrey Lider Nahum Travitzky Daqing Yuan |
| author_sort | Ke Li |
| collection | DOAJ |
| description | This paper presents the results of microstructural analysis of novel preceramic paper-derived SiCf/SiC composites fabricated by spark plasma sintering. The sintering temperature and pressure were 2100/2200 °C and 60/100 MPa, respectively. The content of fibers in the composites was approx. 10 wt %. The SiC<sub>f</sub>/SiC composites were analyzed by positron annihilation methods, X-ray diffraction technology, scanning electron microscopy, and Raman spectroscopy. Longer sintering time causes the proportion of the 6H-SiC composition to increase to ~80%. The increase in sintering temperature from 2100 °C to 2200 °C leads to partial transition of 4H-SiC to 6H-SiC during the sintering process, and the long-life component of positrons indicates the formation of Si vacancies. The Raman characteristic peaks of turbostratic graphite appear in the Raman spectrum of SiC fibers, this is caused by the diffusion of carbon from the surface of the SiC fiber and the preceramic paper during the high-temperature sintering process. |
| first_indexed | 2024-03-10T05:19:52Z |
| format | Article |
| id | doaj.art-92467ff972cb4e038f462d2826867bbc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:19:52Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-92467ff972cb4e038f462d2826867bbc2023-11-23T00:07:55ZengMDPI AGMaterials1996-19442021-11-011422673710.3390/ma14226737Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC CompositesKe Li0Egor Kashkarov1Hailiang Ma2Ping Fan3Qiaoli Zhang4Peng Zhang5Jilong Zhang6Zhaohui Wu7Larissa Wahl8Roman Laptev9Andrey Lider10Nahum Travitzky11Daqing Yuan12China Institute of Atomic Energy, Beijing 102413, ChinaSchool of Nuclear Science and Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, RussiaChina Institute of Atomic Energy, Beijing 102413, ChinaChina Institute of Atomic Energy, Beijing 102413, ChinaChina Institute of Atomic Energy, Beijing 102413, ChinaThe Institute of High Energy Physics of the Chinese Academy of Sciences, Beijing 100049, ChinaState Nuclear Security Technology Center, Beijing 102401, ChinaState Nuclear Security Technology Center, Beijing 102401, ChinaDepartment of Materials Science, Glass and Ceramics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, GermanySchool of Nuclear Science and Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, RussiaSchool of Nuclear Science and Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, RussiaDepartment of Materials Science, Glass and Ceramics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, GermanyChina Institute of Atomic Energy, Beijing 102413, ChinaThis paper presents the results of microstructural analysis of novel preceramic paper-derived SiCf/SiC composites fabricated by spark plasma sintering. The sintering temperature and pressure were 2100/2200 °C and 60/100 MPa, respectively. The content of fibers in the composites was approx. 10 wt %. The SiC<sub>f</sub>/SiC composites were analyzed by positron annihilation methods, X-ray diffraction technology, scanning electron microscopy, and Raman spectroscopy. Longer sintering time causes the proportion of the 6H-SiC composition to increase to ~80%. The increase in sintering temperature from 2100 °C to 2200 °C leads to partial transition of 4H-SiC to 6H-SiC during the sintering process, and the long-life component of positrons indicates the formation of Si vacancies. The Raman characteristic peaks of turbostratic graphite appear in the Raman spectrum of SiC fibers, this is caused by the diffusion of carbon from the surface of the SiC fiber and the preceramic paper during the high-temperature sintering process.https://www.mdpi.com/1996-1944/14/22/6737laminated compositesilicon carbidemicrostructurespositron annihilation |
| spellingShingle | Ke Li Egor Kashkarov Hailiang Ma Ping Fan Qiaoli Zhang Peng Zhang Jilong Zhang Zhaohui Wu Larissa Wahl Roman Laptev Andrey Lider Nahum Travitzky Daqing Yuan Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC Composites Materials laminated composite silicon carbide microstructures positron annihilation |
| title | Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC Composites |
| title_full | Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC Composites |
| title_fullStr | Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC Composites |
| title_full_unstemmed | Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC Composites |
| title_short | Microstructural Analysis of Novel Preceramic Paper-Derived SiC<sub>f</sub>/SiC Composites |
| title_sort | microstructural analysis of novel preceramic paper derived sic sub f sub sic composites |
| topic | laminated composite silicon carbide microstructures positron annihilation |
| url | https://www.mdpi.com/1996-1944/14/22/6737 |
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