Creep behavior of silica bar core during directional solidification process of single crystal superalloy
Creep characterization of different diameter silica bar core during directional solidification of the single crystal superalloy was investigated by suspension method. The scanning electron microscope (SEM) was employed to observe the microstructure of the surface and transversal section of crept sil...
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| Format: | Article |
| Language: | zho |
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Journal of Aeronautical Materials
2022-12-01
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| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2022.000057 |
| _version_ | 1798014103238737920 |
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| author | JIANG Weiguo HAN Dongyu DONG Lin LI Kaiwen ZHAO Debiao WANG Ruichun REN Yuyan LI Qiang LI Yanzhao |
| author_facet | JIANG Weiguo HAN Dongyu DONG Lin LI Kaiwen ZHAO Debiao WANG Ruichun REN Yuyan LI Qiang LI Yanzhao |
| author_sort | JIANG Weiguo |
| collection | DOAJ |
| description | Creep characterization of different diameter silica bar core during directional solidification of the single crystal superalloy was investigated by suspension method. The scanning electron microscope (SEM) was employed to observe the microstructure of the surface and transversal section of crept silica bar. The energy dispersive spectroscopy (EDS) and X-ray diffraction technology were used to analyse and determine the composition of the reaction product. The experimental results show that the crept deformation amount increases with prolonging of creep time and decreasing of the diameter of the silica bar. When the creep time is 60 min, the diameter 0.5 mm silica bar has the largest creep deformation, and the average deformation is 30 mm, while the 2 mm silica bar is 24 mm. The interfacial reaction of SiO2 with C and Al, which are deposited on the silica bar surface due to the elevated temperature and low vacuum, induces the formation of porous layer. The volume fraction of the porous reaction products leads to the different crept deformation amount of different diameter silica bars. The creep deformation amount of silica bars has a linear relationship with the volume fraction of surface reaction products. |
| first_indexed | 2024-04-11T15:12:10Z |
| format | Article |
| id | doaj.art-d6b326ec30ae4aaf9da27424684d4677 |
| institution | Directory Open Access Journal |
| issn | 1005-5053 |
| language | zho |
| last_indexed | 2024-04-11T15:12:10Z |
| publishDate | 2022-12-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-d6b326ec30ae4aaf9da27424684d46772022-12-22T04:16:36ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50532022-12-01426576410.11868/j.issn.1005-5053.2022.0000572022-0057Creep behavior of silica bar core during directional solidification process of single crystal superalloyJIANG Weiguo0HAN Dongyu1DONG Lin2LI Kaiwen3ZHAO Debiao4WANG Ruichun5REN Yuyan6LI Qiang7LI Yanzhao8Weifang University of Science and Technology, Faculty of Electromechanical and Information, Weifang 262700，Shandong， ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai 200444，ChinaWeifang University of Science and Technology, Faculty of Electromechanical and Information, Weifang 262700，Shandong， ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaWeifang University of Science and Technology, Faculty of Electromechanical and Information, Weifang 262700，Shandong， ChinaWeifang University of Science and Technology, Faculty of Electromechanical and Information, Weifang 262700，Shandong， ChinaWeifang University of Science and Technology, Faculty of Electromechanical and Information, Weifang 262700，Shandong， ChinaWeifang University of Science and Technology, Faculty of Electromechanical and Information, Weifang 262700，Shandong， ChinaWeifang University of Science and Technology, Faculty of Electromechanical and Information, Weifang 262700，Shandong， ChinaCreep characterization of different diameter silica bar core during directional solidification of the single crystal superalloy was investigated by suspension method. The scanning electron microscope (SEM) was employed to observe the microstructure of the surface and transversal section of crept silica bar. The energy dispersive spectroscopy (EDS) and X-ray diffraction technology were used to analyse and determine the composition of the reaction product. The experimental results show that the crept deformation amount increases with prolonging of creep time and decreasing of the diameter of the silica bar. When the creep time is 60 min, the diameter 0.5 mm silica bar has the largest creep deformation, and the average deformation is 30 mm, while the 2 mm silica bar is 24 mm. The interfacial reaction of SiO2 with C and Al, which are deposited on the silica bar surface due to the elevated temperature and low vacuum, induces the formation of porous layer. The volume fraction of the porous reaction products leads to the different crept deformation amount of different diameter silica bars. The creep deformation amount of silica bars has a linear relationship with the volume fraction of surface reaction products.http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2022.000057directional solidificationsilica bar corehigh-temperature creepsingle crystal superalloy |
| spellingShingle | JIANG Weiguo HAN Dongyu DONG Lin LI Kaiwen ZHAO Debiao WANG Ruichun REN Yuyan LI Qiang LI Yanzhao Creep behavior of silica bar core during directional solidification process of single crystal superalloy Journal of Aeronautical Materials directional solidification silica bar core high-temperature creep single crystal superalloy |
| title | Creep behavior of silica bar core during directional solidification process of single crystal superalloy |
| title_full | Creep behavior of silica bar core during directional solidification process of single crystal superalloy |
| title_fullStr | Creep behavior of silica bar core during directional solidification process of single crystal superalloy |
| title_full_unstemmed | Creep behavior of silica bar core during directional solidification process of single crystal superalloy |
| title_short | Creep behavior of silica bar core during directional solidification process of single crystal superalloy |
| title_sort | creep behavior of silica bar core during directional solidification process of single crystal superalloy |
| topic | directional solidification silica bar core high-temperature creep single crystal superalloy |
| url | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2022.000057 |
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