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Ti-Al-Si polyalloysTi-Al-Si polyalloys are commonly utilized in the automotive engine manufacturing sector due to their exceptional heat and friction resistance. Nonetheless, the conventional method of preparing Ti-Al-Si alloys is time and energy intensive, thereby restricting their widespread application. This research focused on the preparation of Ti-Al-Si alloys through aluminum thermal reduction of TiO2TiO2-SiO2SiO2 using CaO-Al2O3Al2O3-MgF2 as the primary slag system. By systematically analyzing the aluminum ratio's impact on alloy propertiesAlloy properties, including slag-gold separation, alloy composition, Ti and Si recovery, physical phase of the alloy, microstructureMicrostructure, and hardnessHardness at varying aluminum ratios, it was found that an increase in aluminum ratio improved the slag-gold separation effect. The resulting alloy consisted predominantly of Ti-Al and Ti5Si3 phases, with an increase in titaniumTitanium recovery and a fluctuation in silicon recovery. Additionally, the hardnessHardness of the Ti-Al-Si alloy exhibited a significant increase.

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Preparation of Ti-Al-Si Alloys by Thermal Reduction of TiO2-SiO2 with Aluminum and Study of Their Properties

  • 会议论文

  • 发表日期：

    2025年

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  • Jiachang Hao,
  • Liangbin Chen,
  • Jingjing Song,
  • Zhenyun Tian,
  • Guibao Qiu

摘要

Ti-Al-Si polyalloysTi-Al-Si polyalloys are commonly utilized in the automotive engine manufacturing sector due to their exceptional heat and friction resistance. Nonetheless, the conventional method of preparing Ti-Al-Si alloys is time and energy intensive, thereby restricting their widespread application. This research focused on the preparation of Ti-Al-Si alloys through aluminum thermal reduction of TiO2TiO2-SiO2SiO2 using CaO-Al2O3Al2O3-MgF2 as the primary slag system. By systematically analyzing the aluminum ratio's impact on alloy propertiesAlloy properties, including slag-gold separation, alloy composition, Ti and Si recovery, physical phase of the alloy, microstructureMicrostructure, and hardnessHardness at varying aluminum ratios, it was found that an increase in aluminum ratio improved the slag-gold separation effect. The resulting alloy consisted predominantly of Ti-Al and Ti5Si3 phases, with an increase in titaniumTitanium recovery and a fluctuation in silicon recovery. Additionally, the hardnessHardness of the Ti-Al-Si alloy exhibited a significant increase.