In Situ Interferometry for ppm-Order Solubility Analysis at High Temperatures: A Case Study of Carbon Solubility in Molten Silicon
In Situ Interferometry for ppm-Order Solubility Analysis at High Temperatures: A Case Study of Carbon Solubility in Molten Silicon
复制标题
用于高温下 ppm 级溶解度分析的原位干涉测量：熔融硅中碳溶解度的案例研究
DOI：
10.1007/s11663-021-02216-4
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Didier Chaussende and Hiroyuki Shibata
中科院分区：
文献类型：
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作者：
Sakiko Kawanishi;Takeshi Yoshikawa;Didier Chaussende and Hiroyuki Shibata
成分在高温熔体中的精确溶解度数据对于设计和优化各种工艺（包括火法冶金和溶液生长工艺）至关重要。在这项研究中，我们开发了一种原位方法来测量熔融金属和合金中的一个组件的溶解度和研究C在熔融Si中的溶解度使用的系统，包括Si和SiC衬底。利用SiC衬底内部的干涉现象，从干涉测量法获取的图像中分析了SiC衬底与熔融Si液滴之间的三维界面形状。从界面形状的变化，C在熔融Si中的溶解度的温度依赖性高达1873 K成功地评估在单一的实验。得到的C溶解度是根据有史以来最小的溶解度，这表明一个可靠的评估，因为高估有时会发生在传统的逐点测量淬火样品。此外，还计算了熔融硅中碳的过量偏摩尔吉布斯自由能。所提出的方法使原位和无坩埚定量分析的溶解度的一个组成部分在熔融金属和合金在几十到几百ppm的顺序为各种材料系统在高温下。
The precise solubility data of a component in high-temperature melts are essential for the design and optimization of various processes including pyrometallurgical and solution growth processes. In this study, we developed anin situmethod for measuring the solubility of a component in molten metals and alloys and investigated C solubility in molten Si using a system comprising Si and SiC substrate. The three-dimensional interfacial shape between the SiC substrate and molten Si droplet was analyzed from images captured by interferometry utilizing the internal interference in the SiC substrate. From the changes in interfacial shape, the temperature dependence of C solubility in molten Si up to 1873 K was successfully evaluated in the single experiment. The obtained C solubilities were in accordance with the smallest solubilities ever reported, suggesting a reliable evaluation because overestimations sometimes happen in the conventional point-by-point measurements of quenching samples. In addition, the excess partial molar Gibbs energy of C in molten Si was evaluated thermodynamically. The proposed method enables thein situand crucible-free quantitative analysis of the solubility of a component in molten metals and alloys in the order of a few tens to hundreds of ppm for various material systems at high temperatures.