In situ study on medium-range order evolution during the polyamorphous phase transition in a Pd-Ni-P nanostructured glass
In situ study on medium-range order evolution during the polyamorphous phase transition in a Pd-Ni-P nanostructured glass
复制标题
Pd-Ni-P纳米结构玻璃多晶相变过程中程有序演化的原位研究
DOI：
10.1016/j.jmst.2022.01.038
复制
发表时间：
2022-04-22
影响因子：
10.9
通讯作者：
Lan, Si
中科院分区：
文献类型：
--
作者：
Fu, Shu;Liu, Sinan;Lan, Si
工程多尺度结构层次的玻璃合金，使广泛的潜在应用。金属玻璃诞生于从原子到纳米尺度的分级结构中。然而，在传统的金属玻璃中，通过快速淬火技术制备的冻结结构是具有挑战性的。在这里，我们表明，Pd40Ni40P20块体纳米结构玻璃的多晶界面结构的惰性气体冷凝与激光蒸发源制备，其多尺度结构可以工程。原位散射实验结果表明，在高压下玻璃态纳米粒子的凝聚过程和随后的加热过程中，界面区域发生了多晶相变，并伴随着中程有序和纳米级异质结构的演化。此外，可以观察到由压力和温度引起的局部有序的重新包装导致的簇连接性的变化。热物理和机械性能，包括玻色子峰，硬度和弹性模量，可以作为热处理参数的函数而改变。我们的研究结果将揭示块体纳米结构玻璃合金的合成与定制的热力学和动力学行为以及机械性能的基础上的理解多晶界面相的亚稳性。(C)2022由Elsevier Ltd代表Journal of Materials Science & Technology编辑部出版。
Engineering multiscale structural hierarchies in glassy alloys enable a broad spectrum of potential applications. Metallic glasses were born in hierarchical structures from atomic-to-nanometer scales. However, the frozen-in structures in traditional metallic glasses prepared by rapid quenching techniques are challenging to tailor. Here, we show that a Pd40Ni40P20 bulk nanostructured glass of polyamorphous interfacial structures was prepared by inert-gas condensation with a laser evaporation source, and its multiscale structures could be engineered. In-situ scattering experiment results reveal polyamorphous phase transitions occurred in the interfacial regions, which are accompanied by the evolution of medium-range order and the nanoscale heterogeneous structures during the condensation process of glassy nanoparticles under high pressure and the following heating process. Moreover, changes in the cluster connectivity resulting from repacking of the local ordering induced by pressure and temperature could be observed. The thermophysical and mechanical properties, including boson peaks, hardness, and elasticity modulus, could be changed as a function of heat-treatment parameters. Our findings would shed light on the synthesis of bulk nanostructured glassy alloys with tailorable thermodynamic and dynamical behavior as well as mechanical properties based on the understanding of metastability for polyamorphous interfacial phases. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.