Phase relation between supercooled liquid and amorphous silicon
Phase relation between supercooled liquid and amorphous silicon
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DOI：
10.1063/1.5129059
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发表时间：
2020-03-02
影响因子：
4
通讯作者：
Uda, Satoshi
中科院分区：
文献类型：
--
作者：
Okada, Junpei T.;Sit, Patrick H. -L.;Uda, Satoshi
根据实验结果讨论了过冷液态硅（l-Si）与非晶硅（a-Si）的相关系。将静电悬浮的l-Si样品过冷至低于熔化温度300 K（T-Cl：1683 K）的低温，并伴随着潜热的释放而固化。结果表明，在1480 K时，由于相变潜热的作用，凝固后的Si样品再次熔化。此外，还发现在凝固温度附近快速淬火的Si样品含有大量的具有四面体配位的a-Si。这两个发现表明，过冷I-Si样品固化成a-Si和a-Si熔化，证实了Turnbull等人提出的两个亚稳相之间的一级相变的想法[Metall. Mater. A 29，1825（1998）]。由AIP Publishing授权出版。
The phase relation between supercooled liquid silicon (l-Si) and amorphous silicon (a-Si) is discussed based on experimental results. Electrostatically levitated l-Si samples were supercooled down to low temperatures, 300K below the melting temperature (T-cl: 1683K), and solidified accompanied by the release of latent heat. It was found that solidified Si samples melted again at 1480K caused by the latent heat. Also, it was found that the Si samples that rapidly quenched near the solidification temperature contained a large amount of a-Si with tetrahedral coordination. These two findings show that the supercooled l-Si samples solidified into a-Si and a-Si melted, confirming the idea of a first-order phase transition between two metastable phases proposed by Turnbull et al. [Metall. Mater. Trans. A 29, 1825 (1998)]. Published under license by AIP Publishing.