Article
Materials Science, Multidisciplinary
Dandan Dong, Qing Wang, Chuang Dong, Tai-Gang Nieh
Summary: The paper discusses and formulates the compositions of metallic alloys by unveiling basic molecule-like structural units in solid solutions. The Friedel oscillation theory is applied to describe the partial charge screening behavior and determine the ideal chemical compositions of conventional metallic alloys. The study proposes a simplified version of short-range order structure, representing charge-neutral and mean-density zones, which can be viewed as the 'molecules' of solid solutions, with examples provided for various alloy types.
SCIENCE CHINA-MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
L. Q. Yang, B. Huang, J. Yi, N. Z. Zhang, C. Geng, Y. Yang, X. X. Shui, G. Wang
Summary: The effect of magnetic interaction on the beta-relaxations of FexNi72-xSi4.8B19.2Nb4 metallic glasses was studied in this article. It was found that the substitution of Fe by Ni changed the beta-relaxation from a shoulder to an excess wing, indicating the entropic effect on the suppression of beta-relaxation. A peak caused by ferromagnetic transformation appeared in the loss modulus curve of Fe30Ni42Si4.8B19.2Nb4 metallic glass with suppressed beta-relaxation, which was sensitive to stress and strain. Additionally, the beta-relaxation could be further adjusted by annealing under a transverse or longitudinal magnetic field.
Article
Chemistry, Physical
N. N. Ren, P. F. Guan, K. L. Ngai
Summary: This study investigated the superposition of frequency dispersion of structural alpha relaxation at different temperature and pressure combinations, as well as the time dependence of faster processes like caged molecule dynamics and JG beta relaxation. Through molecular dynamics simulations, it was confirmed that this property holds for not only alpha relaxation but also caged dynamics and JG beta relaxation.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Meng Gao, John H. Perepezko
Summary: Glassy materials exhibit complex relaxations under external stimuli, which greatly influence their properties. By investigating the relaxation dynamics of metallic glasses under varying heating rates, it was discovered that relaxation events merge and step-like increases occur in the supercooled liquid region. These experimental results shed light on the mechanism of atomic rearrangement during heating and provide a new approach to regulate the physical properties of amorphous materials by controlling their intrinsic relaxation dynamics.
NPG ASIA MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Qijing Sun, David M. Miskovic, Michael Ferry
Summary: This study investigated the impact of film thickness on the development of ultrastable metallic glasses, showing that controlling thickness can tune the thermophysical and mechanical properties of the material. Structural heterogeneity develops with film buildup, leading to variations in properties as the glass undergoes rejuvenation.
MATERIALS TODAY PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
L. T. Zhang, Yun-Jiang Wang, Y. Yang, J. C. Qiao
Summary: In this study, the rejuvenation of metallic glasses through the training of the beta relaxation process is demonstrated. The transition from structural relaxation to rejuvenation is observed with increasing training frequency. Surprisingly, rejuvenation can be achieved at a relatively small cyclic strain of 0.2%. Rejuvenation increases relaxation enthalpy and promotes decoupling of the beta relaxation process and relaxation process. A cluster of beta relaxation time curves is formulated to describe energetic states between ultrastable and ultimately rejuvenated metallic glasses. Additionally, rejuvenation expands the distribution of the beta relaxation process, anelastic, and viscoplastic components during deformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Shuo Li, Ping Huang, Fei Wang
Summary: This study demonstrates that pronounced beta-relaxation can be achieved in Cu50Zr50 MG, effectively improving the plasticity of CuZr alloys. Simulation results and analysis suggest that higher degree of heterogeneity generated in severely deformed regions is responsible for the unusual pronounced beta-relaxation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
M. Wolff, R. Wonneberger, K. E. Freiberg, A. Hertwig, J. Bonse, L. Giebeler, A. Koitzsch, C. Kunz, H. Weber, J. K. Hufenbach, F. A. Mueller, S. Graef
Summary: This study investigates the formation of femtosecond laser-induced periodic surface structures on different compositions of BMGs. The results show that despite the different chemical compositions, the generated surface patterns by laser irradiation exhibit similar properties.
SURFACES AND INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Mao Zhang, Ting Huang, Jiacheng Zhang, Lei Deng, Pan Gong, Xinyun Wang
Summary: Metallic glasses are a novel class of structural and functional materials with unique structure and outstanding properties. However, frequent oxidation during preparation, processing, and application limits their potential industrial applications. Comprehensive understanding of the oxidation behaviors and mechanisms is essential for promoting engineering applications of metallic glasses.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Fucheng Li, Mingxing Li, Liwei Hu, Jiashu Cao, Chao Wang, Yitao Sun, Weihua Wang, Yanhui Liu
Summary: A discovery of Ta-rich metallic glasses with diamond-like wear properties is reported in this work. The discovered metallic glasses exhibit high hardness, high temperature stability, improved plasticity, and crack resistance. By employing deep indentation loading, the alloys with better plasticity and crack resistance can be efficiently identified. These findings suggest the potential of metallic glasses to substantially reduce friction and wear of metals in tribological applications.
Article
Materials Science, Multidisciplinary
Baoshuang Shang, Noel Jakse, Pengfei Guan, Weihua Wang, Jean-louis Barrat
Summary: The effect and mechanism of oscillatory loading on the nucleation process in metallic glasses are investigated using molecular dynamics simulation. A fitting formula is proposed to describe the simulation data quantitatively. The key parameter to control the evolution of the time-temperature-transformation curve under oscillatory loading is found to be the elastic stress, rather than the strain rate. Oscillatory loading can decouple the mobility and nucleation in the deeply supercooled liquid, enhancing deformation ability while suppressing nucleation, which is beneficial for the forming and manufacturing of metallic glasses.
Article
Materials Science, Multidisciplinary
Songling Liu, Xinyu Luo, Jingshan Cao, Zhaoyuan Liu, Beibei Xu, Yonghao Sun, Weihua Wang
Summary: This study evaluates the chemical medium-range ordering in liquid alloys using persistent homology, and finds that in metallic glasses, this ordering is regulated by the activation and inhibition of the constituent components, resulting in a Turing pattern in the topology. The chemical medium-range ordering strongly depends on the elemental types.
MATERIALS TODAY PHYSICS
(2023)
Review
Chemistry, Physical
Yu Chen, Zheng-Wei Dai, Jian-Zhong Jiang
Summary: Metallic glasses and high entropy alloys have shown remarkable features but also have issues. Recent efforts have been made to address these problems by introducing new concepts and mechanisms. High entropy metallic glasses, combining the advantages of both, have become a research focus.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
S. Li, W. H. Lin, Y. Teng, Z. D. Sha
Summary: In this study, we developed a criterion based on the chemical composition to determine whether metallic glasses (MGs) can be rejuvenated. By studying six different MG systems, we found that the rejuvenated MGs have a slow diffusion process at high temperatures. Additionally, the rejuvenated MGs showed large negative mixing enthalpy and large mismatch entropy, indicating a close correlation with the glass-forming ability. These findings advance our understanding of the rejuvenation mechanism in MGs, and establish a correlation between the chemical composition and rejuvenation.
Article
Materials Science, Multidisciplinary
Suyue Yuan, Aoyan Liang, Chang Liu, Aiichiro Nakano, Ken-ichi Nomura, Paulo S. Branicio
Summary: We uncover a vacancy-like structural motif named Q7 in metallic glasses, which plays a significant role in short-range structural disorder and is correlated with the thermal and mechanical behavior of metallic glasses. The discovery of the Q7 motif provides new insights into understanding the relationship between local disorder and structural relaxation in metallic glasses.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Chong Yang, Cheng Zhang, Zheng-Jie Chen, Yu Li, Wen-Yuan Yan, Hai-Bin Yu, Lin Liu
Summary: The study introduces a novel strategy to design efficient and reusable catalysts by incorporating Cu into a metallic glass-based catalyst and constructing three-dimensional hierarchical porous structures through laser 3D printing. The resulting catalysts show outstanding catalytic efficiency and exceptional reusability in degrading dyes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Hao Zhang, Xinyi Wang, Hai-Bin Yu, Jack F. Douglas
Summary: The study investigates the fast beta- and Johari-Goldstein relaxation processes, along with the elastic scattering response of glass-forming liquids and the boson peak. These processes are found to be universal, even in glass-forming liquids with a fragile-strong transition. Heating leads to the growth of stringlets, resulting in an increase in relaxation process intensity and excitation softening.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Hongyu Jiang, Jiyu Xu, Qinghua Zhang, Qian Yu, Laiquan Shen, Ming Liu, Yitao Sun, Chengrong Cao, Dong Su, Haiyang Bai, Sheng Meng, Baoan Sun, Lin Gu, Weihua Wang
Summary: This study directly observed the fractal atomic structure in thin metallic glassy membranes, with the fractal dimension depending on atomic density. The atomic configuration in the metallic glass membrane consists of various polygons with bonding angles concentrated on 45 degrees-55 degrees. The fractal atomic structure is consistent with percolation theory analysis and may explain the enhanced relaxation dynamics and ease of glass transition observed in thin metallic glassy films or surfaces.
Article
Multidisciplinary Sciences
Lai-Quan Shen, Ji-Hao Yu, Xiao-Chang Tang, Bao-An Sun, Yan-Hui Liu, Hai-Yang Bai, Wei-Hua Wang
Summary: The study provides experimental evidence that confirms the role of cavitation mechanism in glass fracture, revealing that self-organized nucleation, growth, and coalescence of nanocavities lead to the appearance of nanopatterns on fracture surfaces. This confirms the presence of nanoscale ductility in fracture of nominally brittle glasses.
Article
Chemistry, Multidisciplinary
Qun Yang, Chao-Qun Pei, Hai-Bin Yu, Tao Feng
Summary: Nanoglasses exhibit promoted beta-relaxation and enhanced microscale tensile plasticity compared to rapidly melt-quenched metallic glasses. The beta-relaxation is sensitive to the interfacial regions among grains in nanoglasses, showing a clear correlation between amorphous nanostructures and the beta-relaxation.
Article
Materials Science, Multidisciplinary
J. Shen, Y. H. Sun, J. Orava, H. Y. Bai, W. H. Wang
Summary: Liquid-to-liquid transition (LLT) in metallic liquids and its relationship with liquid dynamics were studied through in-situ vitrification, annealing, and heating processes. Isothermal-annealing induced forward and heating initiated reversible LLTs were detected, and the LLT mechanisms were revealed by controlling the annealing temperature. A two-step-like increase in specific heat reflected the coexistence of two distinct liquids. This study not only enhances our understanding of LLTs in metallic and molecular liquids, but also uncovers a unique first-order glass-to-glass transition in multi-component metallic systems.
Article
Materials Science, Multidisciplinary
Qi Cheng, Yonghao Sun, Jiri Orava, Haiyang Bai, Weihua Wang
Summary: The subtle existence of a liquid-liquid transition in 'homogeneous' equilibrium metallic liquids has been detected and a phase diagram inclusive of the transition has been constructed using ultrafast calorimetry.
Article
Chemistry, Physical
C. Chang, H. P. Zhang, R. Zhao, F. C. Li, P. Luo, M. Z. Li, H. Y. Bai
Summary: This paper introduces the current status of research on the microscopic structure and dynamic picture of glasses, and discusses a new fast relaxation process. The study found that this fast relaxation is related to the string-like diffusion of liquid-like atoms.
Article
Multidisciplinary Sciences
Jin-Feng Li, Ivan- Soldatov, Xiao-Chang Tang, Bo-Yang Sun, Rudolf Schafer, Song-Ling Liu, Yu-Qiang Yan, Hai-Bo Ke, Yong-Hao Sun, Jiri Orava, Hai-Yang Bai
Summary: Metallic Mimosa pudica, a 3D biomimetic structure made of metallic glass, can bloom, close, and reverse through laser patterning and manual reshaping. This research provides a programming route for constructing buckling structures of metallic glasses and clues for the study of materials with automatic functions.
Article
Chemistry, Multidisciplinary
Xuesong Li, Jing Zhou, Laiquan Shen, Baoan Sun, Haiyang Bai, Weihua Wang
Summary: This study achieves excellent comprehensive soft magnetic properties with high saturation magnetic flux density and low coercivity through the construction of a transitional microstructure in an FeCo-based alloy.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Si-Xu Peng, Zheng Yin, Tao Zhang, Qun Yang, Hai-Bin Yu, Ming-Hua Zeng
Summary: This paper presents a new method for glass formation, utilizing mechanical vibration to facilitate the melting of metal-organic frameworks at lower temperatures and produce glass with unique properties. Experimental results show that the vibrated glass material exhibits a lower glass transition temperature, improved gas accessible porosity, and pronounced short-to-medium range structures compared to conventionally melt-quenched glass.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Multidisciplinary Sciences
Yong Zhao, Baoshuang Shang, Bo Zhang, Xing Tong, Haibo Ke, Haiyang Bai, Wei-Hua Wang
Summary: This study demonstrates that a Ce-based metallic glass can transform into a hyperstable state and exhibit strong resistance against crystallization after long-term aging. The achieved hyperstable state is similar to that of million-year-aged amber, and the Ce-based metallic glass can reach equilibrium liquid state below T-g without crystallization.
Article
Physics, Multidisciplinary
Jie Dong, Hailong Peng, Hui Wang, Yang Tong, Yutian Wang, Wojciech Dmowski, Takeshi Egami, Baoan Sun, Weihua Wang, Haiyang Bai
Summary: The atomic-scale structural rearrangement of glasses under stress is important for understanding their macroscopic mechanical properties. However, it is challenging to experimentally resolve the atomic-scale structural changes of a deformed glass due to its disordered nature. This study shows that structural anisotropy is correlated with non-affine atomic displacements in glasses, providing an approach to identify atomic-scale non-affine deformation. The study also reveals the atomic-level mechanism responsible for plastic flow, which differs between metallic glasses and covalent glasses.
Article
Materials Science, Multidisciplinary
Liang Gao, Yang Sun, Hai-Bin Yu
Summary: The Johari-Goldstein secondary (0) relaxations are intrinsic features of supercooled liquids and glasses, and play a crucial role in several properties of glassy materials. This study demonstrates through atomistic simulations and percolation analysis that the mobile clusters are percolated at the occurrence of 0 relaxation in seven different glassy systems. The percolation transition shows the same temperature and time dependence with 0 relaxation, and emerges universally when about 10% of the atoms are mobile, with a dimension of approximately 2 for the system-spanning cluster. These findings contribute to the understanding of 0 relaxation in glasses.
Article
Materials Science, Multidisciplinary
Tao Zhang, Hui-Feng Zhao, Ke-Yan Wang, Zhen-Jie Chen, Li Li, Jing Peng, Xu Peng, Yong-Jiang Huang, Hai-Bin Yu
Summary: Even in their bulk forms, complex alloys like high-entropy alloys (HEAs) can be used as electrocatalysts for the oxygen evolution reaction (OER). The performance of HEAs is influenced by three crucial factors: homogeneous solid solution phase, surface reconstruction, and diversity of active intermediate species. These factors contribute to the potential industrial applications of bulk HEAs.
