Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment casting
Using fused corundum powder as raw material， silica sol as a binder， and aluminum fluoride trihydrate as mullite phase conversion promoter， the slurry composition of the ceramic shell for directional solidification molding of turbine blades was designed， and the ceramic shell was prepared. The micro...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2024-12-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000057 |
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| author | LI Zhihui ZHAO Yanjie CHEN Xiaoyan QI Chengkang LAI Junhua LU Liangliang LI Fei |
| author_facet | LI Zhihui ZHAO Yanjie CHEN Xiaoyan QI Chengkang LAI Junhua LU Liangliang LI Fei |
| author_sort | LI Zhihui |
| collection | DOAJ |
| description | Using fused corundum powder as raw material， silica sol as a binder， and aluminum fluoride trihydrate as mullite phase conversion promoter， the slurry composition of the ceramic shell for directional solidification molding of turbine blades was designed， and the ceramic shell was prepared. The microstructure and phase composition， high-temperature permeability， thermal expansion， high-temperature mechanics， and resistance to high-temperature deformation of the shell were studied. The results show that after sintering at 1200 ℃， with the help of the catalysis of aluminum fluoride trihydrate， the alumina in the shell reacts with silicon dioxide to produce a mullite whisker. Compared with the ceramic shell without aluminum fluoride trihydrate， the permeability of the shell is increased by about 1 time， the thermal diffusion coefficient is increased， and the thermal expansion coefficient is decreased. At the same time， the addition of aluminum fluoride trihydrate also reduces the high-temperature strength of the shell to a suitable range， improves the high-temperature yield of the shell， and makes the shell maintain a good high-temperature deformation resistance. |
| format | Article |
| id | doaj-art-fa8f0eb8457749d688e15e0fe05ab6b0 |
| institution | Kabale University |
| issn | 1001-4381 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj-art-fa8f0eb8457749d688e15e0fe05ab6b02024-12-20T05:49:37ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812024-12-01521218819510.11868/j.issn.1001-4381.2023.0000571001-4381（2024）12-0188-08Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment castingLI Zhihui0ZHAO Yanjie1CHEN Xiaoyan2QI Chengkang3LAI Junhua4LU Liangliang5LI Fei6Shanghai Key Laboratory for High Temperature Materials and Precision Forming，Shanghai Jiao Tong University，Shanghai 200240，ChinaShanghai Key Laboratory for High Temperature Materials and Precision Forming，Shanghai Jiao Tong University，Shanghai 200240，ChinaShanghai Key Laboratory for High Temperature Materials and Precision Forming，Shanghai Jiao Tong University，Shanghai 200240，ChinaShanghai Key Laboratory for High Temperature Materials and Precision Forming，Shanghai Jiao Tong University，Shanghai 200240，ChinaShanghai Key Laboratory for High Temperature Materials and Precision Forming，Shanghai Jiao Tong University，Shanghai 200240，ChinaShanghai Key Laboratory for High Temperature Materials and Precision Forming，Shanghai Jiao Tong University，Shanghai 200240，ChinaShanghai Key Laboratory for High Temperature Materials and Precision Forming，Shanghai Jiao Tong University，Shanghai 200240，ChinaUsing fused corundum powder as raw material， silica sol as a binder， and aluminum fluoride trihydrate as mullite phase conversion promoter， the slurry composition of the ceramic shell for directional solidification molding of turbine blades was designed， and the ceramic shell was prepared. The microstructure and phase composition， high-temperature permeability， thermal expansion， high-temperature mechanics， and resistance to high-temperature deformation of the shell were studied. The results show that after sintering at 1200 ℃， with the help of the catalysis of aluminum fluoride trihydrate， the alumina in the shell reacts with silicon dioxide to produce a mullite whisker. Compared with the ceramic shell without aluminum fluoride trihydrate， the permeability of the shell is increased by about 1 time， the thermal diffusion coefficient is increased， and the thermal expansion coefficient is decreased. At the same time， the addition of aluminum fluoride trihydrate also reduces the high-temperature strength of the shell to a suitable range， improves the high-temperature yield of the shell， and makes the shell maintain a good high-temperature deformation resistance.https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000057turbine bladedirectional solidificationceramic shellaluminum fluoride trihydratemullite whisker |
| spellingShingle | LI Zhihui ZHAO Yanjie CHEN Xiaoyan QI Chengkang LAI Junhua LU Liangliang LI Fei Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment casting Cailiao gongcheng turbine blade directional solidification ceramic shell aluminum fluoride trihydrate mullite whisker |
| title | Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment casting |
| title_full | Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment casting |
| title_fullStr | Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment casting |
| title_full_unstemmed | Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment casting |
| title_short | Effect of AlF3·3H2O addition on microstructure and properties of ceramic shell for investment casting |
| title_sort | effect of alf3·3h2o addition on microstructure and properties of ceramic shell for investment casting |
| topic | turbine blade directional solidification ceramic shell aluminum fluoride trihydrate mullite whisker |
| url | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000057 |
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