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Meeting 2027 TMS Annual Meeting & Exhibition
Symposium Computational Thermodynamics and Kinetics
Presentation Title Thermodynamic Analysis of Ti-Al-Si Alloys Prepared by Molten Salt Electro-Deoxidation Process
Author(s) Guanghui Zhang, Hui Li, Jinglong Liang
On-Site Speaker (Planned) Guanghui Zhang
Abstract Scope Ti–Al–Si合金具有低密度、高比强和卓越的高温抗氧化能力，在航空航天和能源行业具有巨大应用前景。为开发一种新型低成本集成Ti–Al–Si合金制造方法，采用TiO2、Al2O3以及SiO2粉末作为原料，在NaCl–CaCl2熔融盐介质中电解氧化合成Ti–Al–Si合金。873–1273 K. 还原机制的热力学分析表明，阴极反应释放的O2-阴离子与熔盐中的Ca2+结合，生成CaAl12O19， CaTiO<SUBs>3以及CaSiO3。Ti在反应序列中优先还原：Ti2/CaTiO3 →Ti3O5</Sub> →Ti2O3 →Ti→Ti， 接着是硅还原：SiO<SUB2>/CaSiO<SUB3>3 →Si，最后进行Al还原：Al2O3/CaAl12O19 →Al。经过三种金属元素的连续还原，最终得到均相的Ti–Al–Si合金。
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