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首页> 外文会议>International Conference on Solidification and Gravity; 20040906-09; Miskolc-Lillafured(HU) >Investigation on the morphological instability during directional solidification of a transparent alloy during sounding rocket flights
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Investigation on the morphological instability during directional solidification of a transparent alloy during sounding rocket flights

机译：探空火箭飞行过程中透明合金定向凝固过程中的形貌不稳定性研究

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摘要

The movement and morphological change of a solid-liquid interface in directional solidification was investigated during two sounding rocket flights. By using the transparent binary alloy Succinonitrile-Acetone the dynamic processes at the solidification front could be observed directly. Both the planar interface growth, the onset of instability and the characteristic features of the interface morphology, i.e. the evolution of the primary spacing and amplitudes of the cells and dendrites were evaluated. The comparison with a calculation of the morphological instability based on the theoretical model of Warren and Langer showed a good agreement concerning the critical time and velocity of the solidification front.
机译：研究了两次探空火箭飞行中固液界面在定向凝固中的运动和形态变化。通过使用透明的二元合金丁二腈-丙酮，可以直接观察到凝固前沿的动态过程。评估了平面界面的生长，不稳定性的发作以及界面形态的特征，即细胞和树突的主要间距和幅度的演变。与基于Warren和Langer理论模型的形态不稳定性计算进行的比较表明，在凝固前沿的临界时间和速度方面有很好的一致性。

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