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Modelling the surface tension of liquid metals as a function of oxygen content

机译:用氧含量的函数建模液体金属的表面张力

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摘要

The surface tension of liquid metals depends strongly on atmosphere conditions, in particular on the partial pressure of oxygen, on top of temperature. Predicting the surface tension of metals in different atmosphere conditions is highly desirable for many fundamental and practical applications. Currently, none of the theoretical and semi-empirical approaches reported in the literature can predict accurately the non-metallic impurities (oxygen, sulphur, phosphorous, carbon ...) effect upon the surface tension. These models are mainly descriptive, i.e. they must be adjusted to the experiential datasets. The aim of this work is to fill this gap. A semi-empirical model describing the oxygen effect upon the surface tension of liquid metals is proposed. The key parameter describing this model is the metal recovery rate saturated with oxygen, which can be predicted from crystal. lographic data of the monoxide. For liquid metals where sufficient reliable experimental data is available, the surface tension as a function of oxygen content is predicted using the present theoretical model and compared with experimental data. A very good agreement is found. It is also shown that the proposed model is valid for semiconductors and semimetals and as well.
机译:液态金属的表面张力在大气条件下强烈取决于大气条件,特别是在温度顶部的氧的分压。预测不同大气条件中金属的表面张力对于许多基本和实际应用,非常适合。目前,文献中报道的理论和半经验方法都不能够精确地预测非金属杂质(氧,硫,碳,碳...)对表面张力作用。这些模型主要是描述性的,即它们必须调整到体验数据集。这项工作的目的是填补这个差距。提出了一种描述氧气效应对液态金属表面张力的半实证模型。描述该模型的关键参数是用氧气饱和的金属回收率,其可以从晶体预测。一氧化物的障碍数据。对于有足够可靠的实验数据的液体金属,使用本理论模型预测作为氧含量的函数的表面张力,并与实验数据相比。找到了一个非常好的协议。还表明,所提出的模型对于半导体和半态也有效。

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