Yang Qun, Wang Bo-Yan, Zhao Zi-Han, Zhao Hui-Feng, Bu Qing-Zhou, Li Jing, Yu Peng, Yu Hai-Bin
College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, P. R. China.
Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
J Phys Chem B. 2025 Jan 9;129(1):456-464. doi: 10.1021/acs.jpcb.4c04677. Epub 2024 Dec 17.
Physical vapor deposition (PVD) at an appropriate temperature has been shown to produce ultrastable glass by the mechanism of surface accelerated diffusion. Recently, high-entropy materials have been discovered to display slower atomic diffusion due to the multicomponent high-entropy effects. How this delayed atomic motion influences the formation and stability of PVD glass remains elusive. Here, we show that PVD high-entropy metallic glasses exhibit distinct behaviors: while the increase in the glass transition temperature is minimal, there is a significant increase in enthalpy. These findings indicate that a wide range of thermal and kinetic properties can be customized by controlling the entropy in PVD glasses, opening up new opportunities for materials design and processing.
在适当温度下进行物理气相沉积（PVD）已被证明可通过表面加速扩散机制产生超稳定玻璃。最近，由于多组分高熵效应，已发现高熵材料表现出较慢的原子扩散。这种延迟的原子运动如何影响PVD玻璃的形成和稳定性仍然难以捉摸。在此，我们表明PVD高熵金属玻璃表现出不同的行为：虽然玻璃化转变温度的升高最小，但焓却有显著增加。这些发现表明，通过控制PVD玻璃中的熵，可以定制广泛的热学和动力学性质，为材料设计和加工开辟了新机会。
