Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni Catalysts
This study aimed to study the effects of different catalyst introduction methods on the distribution of SiC nanowires (SiCNWs) and the mechanical properties of SiC<sub>f</sub>/SiC composites. Two different catalyst-introduction methods (electroplating (EP) vs. atomic deposition (AD)) hav...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/8/2900 |
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| author | Zongxu Wu Haoran Wang Zhaoke Chen Ruiqian Zhang Qingbo Wen Zongbei He Ming Li Xiang Xiong |
| author_facet | Zongxu Wu Haoran Wang Zhaoke Chen Ruiqian Zhang Qingbo Wen Zongbei He Ming Li Xiang Xiong |
| author_sort | Zongxu Wu |
| collection | DOAJ |
| description | This study aimed to study the effects of different catalyst introduction methods on the distribution of SiC nanowires (SiCNWs) and the mechanical properties of SiC<sub>f</sub>/SiC composites. Two different catalyst-introduction methods (electroplating (EP) vs. atomic deposition (AD)) have been used to catalyze the growth of SiC nanowires in SiC<sub>f</sub> preforms. The morphology, structure and phase composition were systematically investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The SiCNWs-reinforced SiC<sub>f</sub>/SiC composited was densified by CVI. The compressive strength of the SiCNWs-reinforced SiC<sub>f</sub>/SiC composites was evaluated by radial crushing test. Compared with EP, atomic Ni catalysts fabricated by AD have higher diffusivity for better diffusion into the SiC<sub>f</sub> preform. The yield of SiCNWs is effectively increased in the internal pores of the SiC<sub>f</sub> preform, and a denser network forms. Therefore, the mechanical properties of SiCNW-containing SiC<sub>f</sub>/SiC composites are significantly improved. Compared with the EP-composites and SiC<sub>f</sub>/SiC composites, the compressive strength of AD-composites is increased by 51.1% and 56.0%, respectively. The results demonstrate that the use of AD method to grow SiCNWs is promising for enhancing the mechanical properties of SiC<sub>f</sub>/SiC composites. |
| first_indexed | 2024-03-09T10:32:19Z |
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| id | doaj.art-aa9c4c15a4754fcf8690643dd2c12362 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T10:32:19Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-aa9c4c15a4754fcf8690643dd2c123622023-12-01T21:11:31ZengMDPI AGMaterials1996-19442022-04-01158290010.3390/ma15082900Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni CatalystsZongxu Wu0Haoran Wang1Zhaoke Chen2Ruiqian Zhang3Qingbo Wen4Zongbei He5Ming Li6Xiang Xiong7Science and Technology on High Strength Structural Materials Laboratory, Central South University, Changsha 410083, ChinaScience and Technology on High Strength Structural Materials Laboratory, Central South University, Changsha 410083, ChinaScience and Technology on High Strength Structural Materials Laboratory, Central South University, Changsha 410083, ChinaScience and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on High Strength Structural Materials Laboratory, Central South University, Changsha 410083, ChinaScience and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaThis study aimed to study the effects of different catalyst introduction methods on the distribution of SiC nanowires (SiCNWs) and the mechanical properties of SiC<sub>f</sub>/SiC composites. Two different catalyst-introduction methods (electroplating (EP) vs. atomic deposition (AD)) have been used to catalyze the growth of SiC nanowires in SiC<sub>f</sub> preforms. The morphology, structure and phase composition were systematically investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The SiCNWs-reinforced SiC<sub>f</sub>/SiC composited was densified by CVI. The compressive strength of the SiCNWs-reinforced SiC<sub>f</sub>/SiC composites was evaluated by radial crushing test. Compared with EP, atomic Ni catalysts fabricated by AD have higher diffusivity for better diffusion into the SiC<sub>f</sub> preform. The yield of SiCNWs is effectively increased in the internal pores of the SiC<sub>f</sub> preform, and a denser network forms. Therefore, the mechanical properties of SiCNW-containing SiC<sub>f</sub>/SiC composites are significantly improved. Compared with the EP-composites and SiC<sub>f</sub>/SiC composites, the compressive strength of AD-composites is increased by 51.1% and 56.0%, respectively. The results demonstrate that the use of AD method to grow SiCNWs is promising for enhancing the mechanical properties of SiC<sub>f</sub>/SiC composites.https://www.mdpi.com/1996-1944/15/8/2900SiC nanowiresatomic deposition methodSiC<sub>f</sub>/SiC compositescompression performance |
| spellingShingle | Zongxu Wu Haoran Wang Zhaoke Chen Ruiqian Zhang Qingbo Wen Zongbei He Ming Li Xiang Xiong Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni Catalysts Materials SiC nanowires atomic deposition method SiC<sub>f</sub>/SiC composites compression performance |
| title | Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni Catalysts |
| title_full | Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni Catalysts |
| title_fullStr | Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni Catalysts |
| title_full_unstemmed | Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni Catalysts |
| title_short | Significant Improvement of Mechanical Properties of SiC-Nanowire-Reinforced SiC<sub>f</sub>/SiC Composites via Atomic Deposition of Ni Catalysts |
| title_sort | significant improvement of mechanical properties of sic nanowire reinforced sic sub f sub sic composites via atomic deposition of ni catalysts |
| topic | SiC nanowires atomic deposition method SiC<sub>f</sub>/SiC composites compression performance |
| url | https://www.mdpi.com/1996-1944/15/8/2900 |
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