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Ti-Al二元系合金的表面張力
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重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué)

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the National Program on Key Basic Research Project (973 Program) (Project No. 2013CB632603)


The surface tension of liquid Ti–Al alloys
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Chongqing University,材料科學(xué)與工程學(xué)院,材料科學(xué)與工程學(xué)院,材料科學(xué)與工程學(xué)院,材料科學(xué)與工程學(xué)院

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    摘要:

    采用滴落法研究了在1758K條件下Ti-Al合金的表面張力。同時(shí)采用Butler模型和幾種改進(jìn)的理想溶液模型理論計(jì)算Ti-Al合金表面張力。結(jié)果表明，Ti-Al合金的表面張力隨著Al含量的增加而減小，實(shí)驗(yàn)結(jié)果和采用Butler模型以及改進(jìn)理想溶液模型理論計(jì)算的結(jié)果相一致。Al原子主要分布在熔體的表面，而鈦由于具有高的表面張力主要分布在熔體的內(nèi)部。同時(shí)也討論了表面活性元素硫?qū)i-Al合金表面張力的影響。結(jié)果表明硫?qū)辖鸨砻鎻埩τ绊懞艽?。隨著硫的增加，合金表面張力降低。硫在表面上的濃度高于內(nèi)部。硫在Ti-Al合金中的吸附屬于正吸附。

    Abstract:

    The surface tension of liquid Ti-Al alloys at 1758 K was determined by the improved sessile drop method. The surface tension of liquid Ti-Al alloys were calculated using the Butler’s model and several modified ideal solution models. Results showed 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 was 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 in the bulk. Thus, the adsorption of sulfur for Ti-Al alloys is a positive adsorption.

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劉許旸,呂學(xué)偉,李春新,陳杰,白晨光. Ti-Al二元系合金的表面張力[J].稀有金屬材料與工程,2017,46(1):39~44.[LIUXUYANG, LVXUEWEI, LICHUNXIN, CHENJIE, BAICHENGUANG. The surface tension of liquid Ti–Al alloys[J]. Rare Metal Materials and Engineering,2017,46(1):39~44.]
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  • 收稿日期:2014-10-23
  • 最后修改日期:2015-07-16
  • 錄用日期:2015-09-06
  • 在線發(fā)布日期: 2017-03-16
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