Abstract
The tetra-concentric-ring structure was found to be the fundamental spatiotemporal pattern of the FeNi metal solidification–crystallization in the microgravity environment in space. It was revealed that the single-layer tetra-concentric-ring structure is a fundamental unit involved in the growth of metal dendrites. Its repetition will result in a double-layer-branched dendrite, and its multi-repetition will result in a multi-layer-concentric-ring structure, thus giving rise to multi-layer-branched dendrites. The formation, propagation, and interaction of tetra-concentric-ring structures in the same layer are responsible for the growth of dendrite tip and stern, while dendrite sidebranches are grown up at the junction of interaction of coupled tetra-concentric-ring growth steps between the adjacent layers.
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Xie, X., Chen, M. (2020). Spatiotemporal Pattern of FeNi Metal Melt Solidification and Crystallization Mechanism in Space. In: Yanzhuang Meteorite: Mineralogy and Shock Metamorphism. Springer, Singapore. https://doi.org/10.1007/978-981-15-0735-9_9
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DOI: https://doi.org/10.1007/978-981-15-0735-9_9
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