Abnormal endothermic liquid-liquid phase transition upon cooling Pd40Ni40P20 melts

被引：0

作者：

Yu, Pengfei ^{[1
]}

Han, Xiujun ^{[2
]}

Xia, Mingxu ^{[1
]}

Zhou, Huanyi ^{[2
]}

Cao, Saichao ^{[3
]}

Zhao, Yimeng ^{[1
]}

Zeng, Long ^{[1
]}

Li, Jianguo ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[2] Qilu Univ Technol, Sch Mat Sci & Engn, Jinan 250000, Peoples R China

[3] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2024年 / 125卷 / 03期

基金：

中国国家自然科学基金;

关键词：

BOND-ORIENTATIONAL ORDER; STRUCTURAL EVOLUTION; 1ST-ORDER TRANSITION;

D O I：

10.1063/5.0212843

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Liquid-liquid phase transition (LLPT) is the transformation of a liquid from one distinctive structure to another with the same composition. However, the origin of the structural variation at LLPT is still controversial. Here, we used ab initio molecular dynamics simulation to verify and investigate a high-temperature LLPT in a Pd40Ni40P20 melt; this melt showed a reduction in the nuclei interference of the conventional low-temperature LLPT. An abnormal endothermic LLPT was confirmed with flash differential scanning calorimetry, indicating a change in the atomic short-range-order structure around the P-P bond and a decrease in the number of specific icosahedral-like clusters, such as < 0 2 8 0 > and < 0 2 8 1 >. The structural change of the P-centered clusters changed the solidification path through potential energy adjustments. Our results showed the structural mechanism of the unusual endothermic phenomenon and provided a different insight into regulating the properties of metallic glasses.

引用

页数：6

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