Abstract
Ti5Si3/TiC composite has been successfully prepared from the titanium-rich slag/SiO2/C mixtures precursors by an electrochemical process. The electrochemical production process was carried out in molten CaCl2 salt at 1000 °C and 3.8 V. A pressed cylindrical pellet of titanium-rich slag/SiO2/C mixtures served as a cathode, and a solid oxide oxygen-ion-conducting membrane (SOM) tube filled with carbon-saturated liquid tin acted as an anode. The phase transformation of the cathode pellets during electrolysis process was investigated, the microstructure of the obtained products was characterized. It is found that the reaction pathways can be divided into three main stages during the electro-reduction process. The first stage is the generation of calcium compound, the second stage is the electrochemical reduction of the compound, and the third stage is the formation of Ti5Si3/TiC composite. The prepared Ti5Si3/TiC composite exhibits homogenous and nodular particle morphology.
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Acknowledgements
This work was supported by China National Funds for Distinguished Young Scientists (No. 51225401), the National Natural Science Foundation of China (Nos. 51574164, 51225401 and 51304132), the Science and Technology Commissions of Shanghai Municipality (No. 14JC1491400), the National Basic Research Program of China (No. 2014CB643403) and the Young Teacher Training Program of Shanghai Municipal Education Commission.
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Li, S., Zou, X., Lu, X., Zheng, K., Li, X., Wang, Y. (2018). Electrochemical Preparation of Ti5Si3/TiC Composite from Titanium-Rich Slag in Molten CaCl2. In: Hwang, JY., et al. 9th International Symposium on High-Temperature Metallurgical Processing. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72138-5_50
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DOI: https://doi.org/10.1007/978-3-319-72138-5_50
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