P. Yu, M. Xia, S. Cao, L. Zeng, W. Q. Lu, J. G. Li
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Liquid structure transition upon cooling of liquid Pd40Ni40P20
The precipitates of nano-crystals during solidification obscured the initiation of structural evolution, which in turn hid the information for the understanding of nucleation. Here, we report an endothermic liquid–liquid phase transition of Pd40Ni40P20 alloy far before the nucleation and verified with the in situ synchrotron radiation high-energy x-ray diffraction method and flash differential scanning calorimetry (DSC) analysis. The variations on structure factor, pair-distribution functions (PDFs) and coordination number proved a typical structure transition happen at around 640 °C. And the results of flash DSC confirmed the phenomenon. The observation verifies the liquid–liquid phase transition before nucleation and deepens the understanding of solidification in atomic scale.
期刊介绍：
Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology.
In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics.
APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field.
Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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