Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperatures
The BN coating was deposited on the surface of typical domestic SiC fibers by chemical vapor permeation (CVI) process, and the fibers were oxidized at 800-1200 ℃ for 1 h. The morphology, structure and composition of BN coated SiC fibers after oxidation were characterized. The property changes of BN...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2023-07-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.001041 |
| _version_ | 1797335422649499648 |
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| author | ZHAO Wenqing QI Zhe SHI Xiaolei WANG Yana JIANG Zhuoyu JIAO Jian |
| author_facet | ZHAO Wenqing QI Zhe SHI Xiaolei WANG Yana JIANG Zhuoyu JIAO Jian |
| author_sort | ZHAO Wenqing |
| collection | DOAJ |
| description | The BN coating was deposited on the surface of typical domestic SiC fibers by chemical vapor permeation (CVI) process, and the fibers were oxidized at 800-1200 ℃ for 1 h. The morphology, structure and composition of BN coated SiC fibers after oxidation were characterized. The property changes of BN coated SiC fibers after oxidation were evaluated by tensile strength of monofilament. The results show that when the oxidation temperature is lower than 1000 ℃, the BN coating and its oxide can effectively prevent the erosion of the inner SiC fibers by O2, and when the temperature continues to rise, the SiC fibers are oxidized. With the increase of oxidation temperature, the surface oxide of BN coated SiC fibers goes through the process of α-B2O3→SiCxOy→amorphous SiO2. The tensile strength of BN coated SiC fibers decreases with the increase of oxidation temperature. Direct exposure of BN coating to oxidizing environments reduces the oxidation resistance of SiC fibers. The failure source of fiber fracture first transitions from BN coating defects to B2O3 oxide layer defects and finally evolves into SiO2 oxide layer porosity defects. |
| first_indexed | 2024-03-08T08:37:52Z |
| format | Article |
| id | doaj.art-f6e9482fa7954858869b8c69d53b7636 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-03-08T08:37:52Z |
| publishDate | 2023-07-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-f6e9482fa7954858869b8c69d53b76362024-02-02T00:45:50ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812023-07-0151712713510.11868/j.issn.1001-4381.2022.00104120230712Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperaturesZHAO Wenqing0QI Zhe1SHI Xiaolei2WANG Yana3JIANG Zhuoyu4JIAO Jian5Surface Engineering Division, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaSurface Engineering Division, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaSurface Engineering Division, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaSurface Engineering Division, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaSurface Engineering Division, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaSurface Engineering Division, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaThe BN coating was deposited on the surface of typical domestic SiC fibers by chemical vapor permeation (CVI) process, and the fibers were oxidized at 800-1200 ℃ for 1 h. The morphology, structure and composition of BN coated SiC fibers after oxidation were characterized. The property changes of BN coated SiC fibers after oxidation were evaluated by tensile strength of monofilament. The results show that when the oxidation temperature is lower than 1000 ℃, the BN coating and its oxide can effectively prevent the erosion of the inner SiC fibers by O2, and when the temperature continues to rise, the SiC fibers are oxidized. With the increase of oxidation temperature, the surface oxide of BN coated SiC fibers goes through the process of α-B2O3→SiCxOy→amorphous SiO2. The tensile strength of BN coated SiC fibers decreases with the increase of oxidation temperature. Direct exposure of BN coating to oxidizing environments reduces the oxidation resistance of SiC fibers. The failure source of fiber fracture first transitions from BN coating defects to B2O3 oxide layer defects and finally evolves into SiO2 oxide layer porosity defects.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.001041sic fiberbn coatingoxidationmonofilament tensile |
| spellingShingle | ZHAO Wenqing QI Zhe SHI Xiaolei WANG Yana JIANG Zhuoyu JIAO Jian Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperatures Cailiao gongcheng sic fiber bn coating oxidation monofilament tensile |
| title | Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperatures |
| title_full | Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperatures |
| title_fullStr | Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperatures |
| title_full_unstemmed | Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperatures |
| title_short | Microstructure and properties of SiC fibers coated with BN coating at different oxidation temperatures |
| title_sort | microstructure and properties of sic fibers coated with bn coating at different oxidation temperatures |
| topic | sic fiber bn coating oxidation monofilament tensile |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.001041 |
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