Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam Irradiation
Polyberylliumocarbosilane(PBeCS) precursor fibers were irradiated using electron beam in an atmosphere with N<sub>2</sub>:O<sub>2</sub> rate of 200:1,They were then pyrolyzed at high temperature under nitrogen to give silicon carbide fiber containing beryllium(SiC(Be)).The ef...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2018-12-01
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| Series: | Cailiao gongcheng |
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| Online Access: | http://jme.biam.ac.cn/CN/Y2018/V46/I12/54 |
| _version_ | 1797966273890484224 |
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| author | ZHU Wen-hua YUE Jian-ling HUANG Xiao-zhong WANG Chun-qi HU Si-min WANG Chang |
| author_facet | ZHU Wen-hua YUE Jian-ling HUANG Xiao-zhong WANG Chun-qi HU Si-min WANG Chang |
| author_sort | ZHU Wen-hua |
| collection | DOAJ |
| description | Polyberylliumocarbosilane(PBeCS) precursor fibers were irradiated using electron beam in an atmosphere with N<sub>2</sub>:O<sub>2</sub> rate of 200:1,They were then pyrolyzed at high temperature under nitrogen to give silicon carbide fiber containing beryllium(SiC(Be)).The effect of irradiation dose on the chemical structure,gel content,oxygen content,and tensile strength was studied.The results show that Si-H bonds in the molecular structure of PBeCS react with oxygen in the electron beam irradiation under low oxygen partial pressure bombarding to get Si-OH groups,and then Si-OH groups undergo dehydration condensation reactions to produce Si-O-Si linkage,Si-H and Si-CH<sub>3</sub> decompose and polymerize to produce Si-CH<sub>2</sub>-Si linkage,resulting in cross-linking.SiC(Be) fibers prepared at 1250℃ have smooth and dense surface.XRD curve reveals that β-SiC microcrystals are formed in the fibers.The atom fraction of oxygen of the fiber is less than 5%,and the molar ratio of C to Si is close to 1:1,and the average tensile strength and tensile modulus are 1.8 GPa and 179 GPa,respectively. |
| first_indexed | 2024-04-11T02:13:11Z |
| format | Article |
| id | doaj.art-a8872c9299944f19a57ad9906d1be120 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:13:11Z |
| publishDate | 2018-12-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-a8872c9299944f19a57ad9906d1be1202023-01-03T01:48:58ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812018-12-014612546010.11868/j.issn.1001-4381.2017.000982201812000982Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam IrradiationZHU Wen-hua0YUE Jian-ling1HUANG Xiao-zhong2WANG Chun-qi3HU Si-min4WANG Chang5School of Aeronautics and Astronautics, Central South University, Changsha 410083, ChinaSchool of Aeronautics and Astronautics, Central South University, Changsha 410083, ChinaSchool of Aeronautics and Astronautics, Central South University, Changsha 410083, ChinaSchool of Aeronautics and Astronautics, Central South University, Changsha 410083, ChinaSchool of Aeronautics and Astronautics, Central South University, Changsha 410083, ChinaSchool of Aeronautics and Astronautics, Central South University, Changsha 410083, ChinaPolyberylliumocarbosilane(PBeCS) precursor fibers were irradiated using electron beam in an atmosphere with N<sub>2</sub>:O<sub>2</sub> rate of 200:1,They were then pyrolyzed at high temperature under nitrogen to give silicon carbide fiber containing beryllium(SiC(Be)).The effect of irradiation dose on the chemical structure,gel content,oxygen content,and tensile strength was studied.The results show that Si-H bonds in the molecular structure of PBeCS react with oxygen in the electron beam irradiation under low oxygen partial pressure bombarding to get Si-OH groups,and then Si-OH groups undergo dehydration condensation reactions to produce Si-O-Si linkage,Si-H and Si-CH<sub>3</sub> decompose and polymerize to produce Si-CH<sub>2</sub>-Si linkage,resulting in cross-linking.SiC(Be) fibers prepared at 1250℃ have smooth and dense surface.XRD curve reveals that β-SiC microcrystals are formed in the fibers.The atom fraction of oxygen of the fiber is less than 5%,and the molar ratio of C to Si is close to 1:1,and the average tensile strength and tensile modulus are 1.8 GPa and 179 GPa,respectively.http://jme.biam.ac.cn/CN/Y2018/V46/I12/54polyberylliumocarbosilaneelectron beam irradiationcuringsilicon carbide fiber containing beryllium |
| spellingShingle | ZHU Wen-hua YUE Jian-ling HUANG Xiao-zhong WANG Chun-qi HU Si-min WANG Chang Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam Irradiation Cailiao gongcheng polyberylliumocarbosilane electron beam irradiation curing silicon carbide fiber containing beryllium |
| title | Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam Irradiation |
| title_full | Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam Irradiation |
| title_fullStr | Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam Irradiation |
| title_full_unstemmed | Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam Irradiation |
| title_short | Synthesis of Silicon Carbide Fiber Containing Beryllium from Polyberylliumocarbosilane Using Electron Beam Irradiation |
| title_sort | synthesis of silicon carbide fiber containing beryllium from polyberylliumocarbosilane using electron beam irradiation |
| topic | polyberylliumocarbosilane electron beam irradiation curing silicon carbide fiber containing beryllium |
| url | http://jme.biam.ac.cn/CN/Y2018/V46/I12/54 |
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