| Autor: |
Shiga, Keiji, Billaut, Léo, Maeda, Kensaku, Morito, Haruhiko, Fujiwara, Kozo |
| Předmět: |
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| Zdroj: |
AIP Advances; Jul2018, Vol. 8 Issue 7, pN.PAG-N.PAG, 5p |
| Abstrakt: |
The instability of a crystal–melt interface during the directional growth of pure antimony was studied using an in-situ observation technique. The morphology of the crystal–melt interface was planar at a low growth velocity, while the interface transitioned to wavy and then zig-zag faceted at 60 μm s−1. Calculating the thermal field at the crystal–melt interface using a diffusion equation showed that the temperature gradient in the melt becomes negative when the moving velocity of the interface is higher than 52 μm s−1. These results demonstrate that perturbations introduced into the planar interface are amplified by a negative temperature gradient and these amplified perturbations result in zig-zag facets. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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