Ti-Al二元系合金的表面张力（英文）  

Surface Tension of Liquid Ti-Al Alloys

作　　者：刘许旸[1] 吕学伟[1] 李春新[1] 陈杰[1] 白晨光[1] 

机构地区：[1]重庆大学,重庆400044

出　　处：《稀有金属材料与工程》2017年第1期39-44,共6页Rare Metal Materials and Engineering

基　　金：National Key Basic Research Development Program of China("973"Program)(2013CB632603)

摘　　要：采用滴落法测定了在1758 K条件下Ti-Al合金的表面张力。同时采用Butler模型和几种改进的理想溶液模型理论计算了Ti-Al合金的表面张力。结果表明,Ti-Al合金的表面张力随着Al含量的增加而减小。实验结果和采用Butler模型以及改进的理想溶液模型理论计算的结果相一致。Al原子主要分布在熔体的表面,而Ti由于具有高的表面张力主要分布在熔体的内部。同时也讨论了表面活性元素硫对Ti-Al合金表面张力的影响。结果表明硫对合金表面张力影响很大,随着硫的增加,合金表面张力降低。硫在表面上的浓度高于内部。硫在Ti-Al合金中的吸附属于正吸附。The surface tension of liquid Ti-Al alloys at 1758 K was determined by an improved sessile drop method. The surface tension of liquid Ti-Al alloys was calculated using the Butler＇s model and several modified ideal solution models. Results show that the surface tension of liquid Ti-Al alloy decreases with increased Al concentration. Experimental results agree well with both the Butler＇s model and the modified ideal solution model. The segregation of Al atoms to the surface occurs at all bulk concentrations of Ti-Al alloys. Al with lower surface tension prefers to segregate on the surface of liquid Ti-Al alloy, whereas Ti with higher surface tension prefers to segregate inside the molten alloy. The effect of surface active solute on the surface tension of liquid Ti-Al alloy was also discussed. Sulfur is found to have a larger effect on the surface tension of alloy. The surface tension of liquid Ti-Al alloy decreases with increased sulfur concentration. Sulfur concentration on the surface is higher than that in the bulk. Thus, the adsorption of sulfur for Ti-Al alloys is a positive adsorption.

关 键 词：TI-AL合金 热力学性质 表面张力 

分 类 号：TG146.23[一般工业技术—材料科学与工程]