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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 Ti-Al alloy at 1758 K was measured by the dripping method. At the same time, the surface tension of Ti-Al alloy was calculated using Butler model and several improved ideal solution model theory. The results show that the surface tension of Ti-Al alloy decreases with the increase of Al content. The experimental results are consistent with the results calculated using the Butler model and the improved ideal solution model theory. Al atoms are mainly distributed on the surface of the melt, and Ti is mainly distributed inside the melt due to the high surface tension. The effect of surface active elemental sulfur on the surface tension of Ti-Al alloy was also discussed. The results show that sulfur has a great influence on the surface tension of the alloy, and as the sulfur increases, the surface tension of the alloy decreases. The concentration of sulfur on the surface is higher than the interior. The adsorption of sulfur in Ti-Al alloy belongs to positive adsorption.