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首页> 外文会议>International Conference on Solidification and Gravity; 20040906-09; Miskolc-Lillafured(HU) >EFFECTS OF THE INTERFACE CURVATURE AND DENDRITE ORIENTATION IN DIRECTIONAL SOLIDIFICATION OF BULK TRANSPARENT ALLOYS
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EFFECTS OF THE INTERFACE CURVATURE AND DENDRITE ORIENTATION IN DIRECTIONAL SOLIDIFICATION OF BULK TRANSPARENT ALLOYS

机译：界面弯曲和枝晶取向在块状透明合金定向凝固中的作用

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摘要

The properties of structural materials are to a large extent determined by the solid microstructure so that the understanding of the fundamental physics of microstructure formation is critical in the field of materials engineering. A directional solidification facility dedicated to the characterization of solid-liquid interface morphology by means of optical methods has been developed by CNES in the frame of the DECLIC project. This device enables in situ and real time studies on bulk transparent materials. The aim of the project is to perform experiments in microgravity to eliminate the complex couplings between solidification and convection and to get reliable benchmark data to validate and calibrate theoretical modeling and numerical simulations. Presently, ground experiments are performed to finalize the design and the experimental procedures and to guarantee the accuracy of the measurements. These experiments also provide reference data for the study of solidification microstructure dynamics in the presence of buoyancy-driven natural convection. Recent progress is presented concerning the control of the interface shape (critical for pattern analysis), the selection of single crystal of defined orientation (critical for dendritic growth) and the analysis of the dendrite shape.
机译：结构材料的性能在很大程度上取决于固体微观结构，因此对微观结构形成的基本物理学的理解在材料工程领域至关重要。 CNES在DECLIC项目的框架内开发了一种定向固化设备，专用于通过光学方法表征固液界面形态。该设备可对大量透明材料进行原位和实时研究。该项目的目的是在微重力下进行实验，以消除凝固和对流之间的复杂耦合，并获得可靠的基准数据，以验证和校准理论模型和数值模拟。目前，进行地面实验以最终确定设计和实验程序并保证测量的准确性。这些实验还为浮力驱动自然对流条件下的凝固微观结构动力学研究提供参考数据。提出了有关界面形状控制（对图案分析至关重要），选择取向确​​定的单晶（对树枝状晶体生长至关重要）以及树枝状晶体形状分析的最新进展。

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