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首页> 外文期刊>Journal of Crystal Growth >Morphological stability of a solid-liquid interface and cellular growth: Insights from thermoelectric measurements in microgravity experiments
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Morphological stability of a solid-liquid interface and cellular growth: Insights from thermoelectric measurements in microgravity experiments

机译:固液界面的形态稳定性和细胞生长:微重力实验中热电测量的见解

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The objective of this paper is to present reference experimental measurements of the morphological stability threshold velocity and cellular growth undercooling for two alloy compositions in the tin bismuth (Sn-Bi) metallic system. The measure is based on an original in situ diagnostic that relies on the Seebeck thermoelectric effect and benefits from the microgravity environment to guarantee diffusive solute transport conditions. When analysed using independently determined thermo-physical parameters, the experimental data is found to support the validity of the Mullins and Sekerka theory. Above the morphological stability threshold, the data can be interpreted assuming that the cell tips progress along the temperature gradient until the local driving force for morphological instability becomes negligible. (c) 2005 Elsevier B.V. All rights reserved.
机译:本文的目的是为锡铋(Sn-Bi)金属系统中两种合金成分的形态稳定性阈值速度和细胞生长过冷提供参考实验测量。该措施基于原始的现场诊断,该诊断依赖于塞贝克的热电效应,并受益于微重力环境来保证扩散的溶质运移条件。当使用独立确定的热物理参数进行分析时,发现实验数据支持Mullins和Sekerka理论的有效性。超过形态学稳定性阈值,可以假设细胞尖端沿温度梯度前进,直到形态学不稳定性的局部驱动力可以忽略不计,才可以解释数据。 (c)2005 Elsevier B.V.保留所有权利。

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