Ti对Sn-xTi/Al2O3润湿性的影响

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (4): 15-21.

Ti对Sn-xTi/Al₂O₃润湿性的影响

隋然¹, 居春艳², 贾金龙¹, 赵丹¹

1.兰州工业学院材料工程学院, 甘肃兰州 730050;
2.兰州理工大学技术工程学院, 甘肃兰州 730050

收稿日期:2019-11-08 出版日期:2020-08-28 发布日期:2020-11-10
作者简介:隋然(1983-),女,辽宁阜新人,硕士,讲师.
基金资助:
国家自然科学基金(51665031)

Effect of Sn-xTi/Al₂O₃ wettability with Ti addition

SUI Ran¹, JU Chun-yan², JIA Jin-long¹, ZHAO Dan¹

1. College of Materials Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China;
2. College of Technology and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2019-11-08 Online:2020-08-28 Published:2020-11-10

摘要/Abstract

摘要： 针对添加活性元素Ti有利于改善金属/Al₂O₃体系的润湿性、但润湿机制仍不明确问题,研究采用改良座滴法,研究了熔融Sn-(原子分数为0%、2%、5%)Ti合金在973~1 273 K高真空中在Al₂O₃表面的润湿性.研究结果表明:Ti原子分数的增加会显著改善Sn-xTi/Al₂O₃体系的润湿性,润湿性改善的原因在于Ti在界面处的吸附降低了固/液界面自由能,而并非界面析出的反应产物.对此结论,应用吸附的统计热力学模型验证了实验结果,并证明Sn-xTi/Al₂O₃体系的铺展动力学在很大程度上受控于吸附动力学.

关键词: 润湿性, 铺展, 吸附, 界面反应

Abstract: In order to solve a problem that addition of active element Ti is beneficial to improve wettability of metal/Al₂O₃ system, but the wettability mechanism is still unclear, the wettability of molten Sn-(0%,2%,5%) Ti alloy on Al₂O₃ surface in high vacuum at 973~1 273 K was studied by improved sessile drop method. The results show that increase of Ti content significantly improves the wettability ofSn-xTi/Al₂O₃ system. The reason for wettability improvement is that the adsorption of Ti at the interface reduces free energy of the solid/liquid interface, rather than the reaction product precipitated at the interface. For this conclusion, conducted experimental results are verified by a statistical thermodynamic model of adsorption, and it is proved that the spreading kinetics of Sn-xTi Al₂O₃ system is well controlled by the adsorption kinetics to a great extent.

Key words: wettability, spreading, adsorption, interfacial reaction

中图分类号:

TG174.443

隋然, 居春艳, 贾金龙, 赵丹. Ti对Sn-xTi/Al₂O₃润湿性的影响[J]. 兰州理工大学学报, 2020, 46(4): 15-21.

SUI Ran, JU Chun-yan, JIA Jin-long, ZHAO Dan. Effect of Sn-xTi/Al₂O₃ wettability with Ti addition[J]. Journal of Lanzhou University of Technology, 2020, 46(4): 15-21.

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Ti对Sn-xTi/Al₂O₃润湿性的影响

Effect of Sn-xTi/Al₂O₃ wettability with Ti addition

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