Analysis of effects of reactant particle size on phase transformations in the Ti-Si-Cu system using differential thermal analysis and x-ray diffraction

作者：Lu, Si-Jie; Wang, Hui-Yuan^*; Yang, Zhi-Zheng; Jiang, Qi-Chuan

来源：Journal of Materials Research, 2012, 27(20): 2615-2623.

DOI：10.1557/jmr.2012.196

• HIGH-TEMPERATURE SYNTHESIS
• COMBUSTION SYNTHESIS
• TITANIUM SILICIDE
• TI5SI3
• MECHANISM
• BEHAVIOR
• MICROSTRUCTURE
• EXPANSION
• ALLOYS
• ZR

Effects of Ti and Si particle sizes on phase transformations of Ti-Si-Cu system were explored through differential thermal analysis (DTA), x-ray diffraction (XRD), and field emission scanning electron microscope (FESEM). For Ti[15]Si[15]Cu[45] system, fine Ti easily dissolves into Si-Cu liquid to form Ti-Si-Cu liquid at similar to 795 degrees C, which further participates into the reaction of beta-Ti and Si to yield abundant quantity of Ti5Si3 at similar to 917 degrees C. For Ti[150]Si[15]Cu[45] system, nonetheless, the reaction of coarse Ti with Si-Cu liquid involves more difficulty in forming the ternary liquid, which is the causal factor for the delay in the formation of Ti5Si3 to similar to 948 degrees C. For Ti[15]Si[150]Cu[45] system, coarse Si results in the formation of insufficient Si-Cu liquid initially, whereas Ti-Cu liquid forms at similar to 960 degrees C instead, which further reacts with coarse Si to form Ti-Si-Cu liquid, and then Ti5Si3 is precipitated from the liquid.

• 出版日期2012-10
• 单位吉林大学