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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Phase Transformations and Microstructural Evolution
Presentation Title A Comprehensive Investigation on the Sintering Behavior of CaO-SiO2-CaF2-Al2O3 Slags System
Author(s) Liang Yu, Shaopeng Gu, Guanghua Wen, Chunhua Ran, Funian Han, Zhe Wang
On-Site Speaker (Planned) Liang Yu
Abstract Scope Sintering behavior were vital significant for the lubrication and transfer heat performance of mold fluxes during the casting process. In this paper, the sintering behavior of CaO-SiO2 slags with different Al2O3 and CaF2 were systematically investigated combining with TG-DSC, XRD, DIL, hemispherical point and SEM techniques. The mineral phase transformation process of slags was understood during the heating process. The results showed that Ca2SiO4 was formed at 1370 °C in CaO-SiO2 slags with 12.63% volume shrinkage. Ca4Si2O7F2 was occurred at 1173 °C with 64.06% volume shrinkage of slags when CaF2 was added to CaO-SiO2 slags. In CaO-SiO2-Al2O3 slags, Ca3Al2O6 was first formed and then transformed into Ca2Al2SiO7 at 1342 °C with 53.63% volume shrinkage. At 1148 °C, the Ca2Al2SiO7 and Ca4Si2O7F2 were coexisted in CaO-SiO2-Al2O3-CaF2 slags with the volume shrinkage of 60.13%. Besides, the solid phase reaction temperatures of slags were decreased by adding CaF2 and Al2O3.
Proceedings Inclusion? Planned:
Keywords Phase Transformations, Solidification, Characterization

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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H-21: Study of the Evolution of the Crystallographic Texture of the Microstructure during Grain Growth
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H-23: The Role of Co on Suzuki Segregation in Ni- and Co-based Superalloys
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