Article
Materials Science, Multidisciplinary
Yan Li, Xingwang Cheng, Zhaolong Ma, Xuhai Li, Meng Wang
Summary: The Zr-based bulk metallic glass exhibited different damage evolution characteristics under different impact pressures, transitioning from spallation to fragmentation. The fragments of the specimen were welded after impact due to high temperature remelting, causing plastic deformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Xiulin Ji, Yiping Shan, Cuicui Ji, Hui Wang, Zhanxi Zhao
Summary: The slurry erosion behaviors of Zr BMGs were investigated, showing an increase in volume loss rate with higher impact angles and velocities, indicating their brittle erosion characteristics. Additionally, surface devitrification and element variations were observed during the erosion tests on the BMGs.
Article
Nanoscience & Nanotechnology
Silvia Pomes, Nozomu Adachi, Masato Wakeda, Takahito Ohmura
Summary: This study found a precursor phenomenon to incipient plasticity before the first serration in Zr50Cu40Al10 at% bulk metallic glass via nanoindentation testing.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Ceramics
D. L. Ouyang, Y. H. Yan, S. S. Chen, D. Huang, Z. R. Wang, X. Cui, Q. Hu, S. Guo
Summary: In this study, a simple method was used to quantify the castability and glass-forming ability (GFA) of two SIM card slots with different designs, as well as at different casting temperatures. It was found that the Zr55Cu30Ni5Al10 (Zr55) alloy has a wider optimal casting temperature range compared to the Zr52.5Cu25Ni9.5Al7Ti6 (Zr52.5) alloy, indicating better GFA of Zr55. However, within the optimal casting temperature range, the castability of Zr52.5 was significantly better than that of Zr55 due to its lower melting point, poorer wettability to the copper mold, and higher optimal casting temperature. These findings provide guidance for the production of Zr-based bulk metallic glass components.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Engineering, Manufacturing
S. H. Chen, Q. Ge, J. S. Zhang, W. J. Chang, J. C. Zhang, H. H. Tang, H. D. Yang
Summary: Zr57 BMG showed excellent machinability at low-speed cutting with superior surface roughness and no crystallization. Scale-like patterns were observed on the machined surface due to plastic flow, which could be effectively suppressed by adjusting cutting parameters.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Nanoscience & Nanotechnology
C. Liu, Y. Ikeda, R. Maass
Summary: This study provides strong evidence for the accumulation of structural damage in Zr-based bulk metallic glass as a result of shear strain admitted by shear bands. Analysis of shear-band structure with high-angle annular dark field transmission electron microscopy reveals scattered data with an overall trend of increasing local volume dilatation with increasing shear strain. However, locally, a variety of trends are observed, highlighting the strong heterogeneity of structural damage in shear bands in metallic glasses.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Pengcheng Zhang, Cheng Zhang, Lin Liu
Summary: This study achieves a promising combination of high strength, good plasticity, and fracture toughness in 3D-printed bulk metallic glasses through the strategy of defect engineering.
MATERIALS RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
J. Ding, A. Inoue, S. L. Zhu, S. L. Wu, E. Shalaan, A. A. Al-Ghamdi
Summary: This study investigated the effects of increased aluminum content on the glass-forming ability, microstructure, phase stability, mechanical properties, and deformation behaviors of Zr-rich Zr-Cu-Al alloys in bulk metallic glass composites (BMGCs). It was found that higher aluminum content improved the glass-forming ability of the alloys, leading to the fabrication of BMGCs with enhanced performance. The Zr-rich Zr-Cu-Al BMGCs exhibited a large fracture strain and high fracture strength under compression, with superior plastic deformation capabilities attributed to factors such as the formation of shear bands and interactions between crystals and shear bands.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
G. H. Duan, M. Q. Jiang, X. F. Liu, L. H. Dai, J. X. Li
Summary: In this study, in-situ quasistatic tension experiments inside a scanning electron microscope were conducted to investigate the shearbanding behaviors of a Zr-based bulk metallic glass composite with dendritic phases. It was observed that shear bands initiate at the interface of the metallic glass matrix and dendrites, and dendrites can alter the propagation direction of shear bands or stop them. This work provides valuable insights into the shear-banding and failure mechanisms of Zr-based metallic glass composites with dendrites.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Karina E. Avila, Vardan Hoviki Vardanyan, Tong Zhu, Stefan Kuechemann, Marek Smaga, Herbert M. Urbassek
Summary: In this study, both experiments and molecular dynamics simulations were used to explore the deformation behavior of metallic glasses subjected to previous tensile deformation. The experimental investigations were carried out on a Zr67Cu10.6Ni9.8Ti8.8Be3.8 (wt%) sample, while the simulations were performed on a Cu64.5Zr35.5 sample. Plasticity was induced in the specimens through tensile deformation and further studied using cyclic indentation. The results from both experiments and simulations showed qualitative agreement in terms of the measured macroscopic properties and revealed the evolution of microscopic properties in different regions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Ming Zhang, Yujia Wang, Guanzhong Ding, Rui Zheng, Ranfeng Wei, Guoyang Zhang, Qijing Sun, Xiangjin Zhao, Li Liu
Summary: Superhydrophobic metal materials have great potential for use in precision blood-contacting medical devices. This study focuses on finding a metal material with excellent biocompatibility and superplastic forming ability to fabricate a superhydrophobic surface, which is of significant practical importance. The Zr-based bulk metallic glass was selected as the experimental sample, and a micro-nano hierarchical structure was etched by electrochemical method in an ultrasonic environment. The further modification resulted in a superhydrophobic surface with good biocompatibility. Electrochemical polarization tests showed that the superhydrophobic surface had long-term corrosion resistance in simulated body fluids. Blood and cell tests demonstrated that the superhydrophobic sample had an extremely low rate of hemolysis and effectively inhibited the adhesion of platelets and smooth muscle cells. The superhydrophobic sample surface also exhibited good mechanical durability and chemical stability. This study provides a new perspective on the application of Zr-based bulk metallic glass in blood-contacting medical devices.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Lianshun Zhang, Tuo Wang, Qiqi Hou, Qi Hao, Jichao Qiao
Summary: Phase separation is observed in the glassy matrix of a certain bulk metallic glass after deformation, leading to the formation of Cu-rich and Zr, Fe-rich zones. The deformed material shows increased intensity of beta-relaxation and free volume, exhibiting a work-hardening behavior and higher compressive plasticity compared to the undeformed material, which is attributed to microstructural heterogeneity and rejuvenation caused by the deformation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Yang Deng, Chengyong Wang, Feng Ding, Tao Zhang, Weikai Wu
Summary: In this study, the flow behavior of Zr-based bulk metallic glass during machining was investigated. The results show that the increase of temperature during cutting leads to a transition of the amorphous chips from a laminated structure to a viscous flow state. The chips in the stable sticking area of the tool-chip interface exhibit phase separation and consist of various crystalline phases and quasi-crystals, while the chips far away from the interface remain in the amorphous state with uniform composition. The viscous-fluid chips act as a protective layer for the tool, reducing tool wear.
Article
Biophysics
Yujia Wang, Ming Zhang, Guanzhong Ding, Ranfeng Wei, Rui Zheng, Chaojun Li, Wei Wang, Hao Zhang, Qijing Sun, Xiangjin Zhao, Li Liu
Summary: This study successfully prepared a stable and wear-resistant superhydrophobic coating, which can be applied in the medical field to inhibit bacterial adhesion and promote cell adhesion.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Yunfei Ma, Xuefeng Tang, Xin Wang, Mao Zhang, Huie Hu, Pan Gong, Xinyun Wang
Summary: The study prepared tungsten-particle-reinforced bulk-metallic-glass composites with varying Wp volume fractions using spark plasma sintering, and found that the mechanical properties of the composites were significantly influenced by the volume fraction of Wp. The increase in Wp volume fraction not only affected the mechanical properties of the composites, but also improved their self-sharpening ability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
V. Semin, J. Jiang, V. I. Polkin, D. V. Louzguine-Luzgin
Summary: Nanocrystalline Ti-Ni-Cu-Co system alloys exhibit excellent stability of superelastic behavior, but residual elastic stresses remain an issue in their implementation in microelectromechanical systems. By studying the structure formation and stress evolution, it was found that elastic stresses in the B2 phase can be reduced by half through isothermal annealing.
Article
Materials Science, Ceramics
A. Bazlov, M. S. Parkhomenko, E. Ubyivovk, E. N. Zanaeva, D. Gunderov, D. Louzguine-Luzgin
Summary: This paper analyzes the effect of severe plastic deformation on the structure, mechanical and thermal properties of a Zr42.5Cu42.5Al10Fe5 alloy, showing that high pressure torsion induces phase separation of an amorphous matrix and formation of nanocrystalline particles. The precipitation of nanocrystals leads to changes in the composition of the amorphous matrix, crystallization process and characteristic temperatures of the alloy, resulting in significant increase in material hardness.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Multidisciplinary Sciences
Florian Spieckermann, Daniel Sopu, Viktor Soprunyuk, Michael B. Kerber, Jozef Bednarcik, Alexander Schokel, Amir Rezvan, Sergey Ketov, Baran Sarac, Erhard Schafler, Juergen Eckert
Summary: In-situ X-ray diffraction is used to study structural rearrangements during annealing processes in Cu44Zr-44Al8Hf2Co2 bulk metallic glass. The deformation-induced rejuvenation reveals a structural footprint that can be correlated to calorimetric signals, showing characteristics of a first-order transition for the beta-transition. Dynamic mechanical analysis data indicates that non-reversible structural rearrangements are preferentially activated during the beta-transition, while reversible deformations dominate the low-temperature alpha-transition with second-order characteristics.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Michael I. Ojovan, Dmitri V. Louzguine-Luzgin
Summary: We utilize displacement analysis of Cu-atoms to reveal structural changes at the glass transition. The disordered congruent bond lattice of Cu loses rigidity above the glass transition temperature (T-g) due to percolation via broken Cu-Cu chemical bonds. Analysis of the first sharp diffraction minimum (FDSM) provides a more precise determination of T-g compared to classical empirical criteria.
Article
Physics, Condensed Matter
K. Pussi, D. Louzguine-Luzgin, J. Nokelaineni, B. Barbiellini, V Kothalawala, K. Ohara, H. Yamada, A. Bansil, S. Kamali
Summary: In this study, a reverse Monte Carlo technique is applied to determine the atomic structure of amorphous bulk metallic glasses. The findings contribute to the understanding of the functional properties of Fe-based metallic glasses driven by disorder effects.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Dmitri Louzguine-Luzgin, Jing Jiang
Summary: Low temperature relaxation and structural changes in a Cu36Zr48Al8Ag8 bulk glassy alloy were investigated using differential scanning calorimetry, X-ray diffractometry, scanning and transmission electron microscopy. The results showed that the densification of the sample occurred due to the beginning of structural relaxation, resulting in an increase in room-temperature mechanical strength and plasticity values.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
D. Louzguine-Luzgin, J. Jiang, G. R. Aripov, Yu P. Ivanov, V. Polkin
Summary: In this study, a Fe-Mn-Co-Al-C alloy with good tensile plasticity and high strength was obtained through standard technological operations. The high-entropy approach was utilized to form a duplex-type solid-solution structure without relying on carbide precipitates for dispersion strengthening. This approach may be applicable to other various alloys.
Article
Nanoscience & Nanotechnology
X. Yuan, D. Sopu, F. Spieckermann, K. K. Song, S. Ketov, K. G. Prashanth, J. Eckert
Summary: Rejuvenation is the reverse process of relaxation in metallic glasses, which increases their free volume and brings them to a higher energy state. This study explores the controllable rejuvenation degree through a dilution procedure and identifies the maximum rejuvenation threshold. The activation of structural relaxation and the dynamic balance between free volume creation and annihilation determine the rejuvenation ability of metallic glasses. The highest degree of rejuvenation is related to the flow strain of the materials and exhibits a structure similar to shear bands.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Mechanical
A. D. Berezner, V. A. Fedorov, M. Yu. Zadorozhnyy, I. S. Golovin, D. V. Louzguine-Luzgin
Summary: Deformation of a Cu-Pd-P amorphous alloy was studied under various frequencies of mechanical load, showing that the deformation can be interpolated using a hyperbolic function and is influenced by the combination of heating and cyclic mechanical loading.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Chemistry, Physical
Yu P. Ivanov, V. O. Semin, Z. Lu, J. Jiang, A. L. Greer, D. Louzguine-Luzgin
Summary: The heating of a metallic glass with nominal composition Mg(75)Ni(20)Mm(5) revealed primary crystallization to Mg2Ni. The study of this crystallization process showed complexity in crystal shape, linear growth, and internal disorder within the crystal.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Multidisciplinary
Yu-Zhang Jiao, Dmitry V. Louzguine-Luzgin, Ke-Fu Yao, Zheng-Jun Zhang, Na Chen
Summary: In this study, a magnetic semiconductor with a high Curie temperature is presented for the development of spintronic devices in next-generation computing systems. The semiconductor exhibits low resistivity and high saturation magnetization at room temperature, and forms a heterojunction with p-type silicon, showing rectifying characteristics. These findings provide design principles for high Curie temperature magnetic semiconductors with determined conduction types, which are crucial for realizing nonvolatile spin-based transistors in information technology beyond Si-based systems.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, Yu. P. Ivanov, A. L. Greer
Summary: The crystallization behavior of a Cu58Y37Sc5 metallic glassy alloy was investigated using various methods. Differential scanning and isothermal calorimetries were performed to study the phase transformations. X-ray diffractometry studies showed the simultaneous formation of Cu2Y, CuY, and CuSc crystalline phases, indicating eutectic crystallization, while the isothermal crystallization kinetics corresponded to primary crystallization. Transmission electron microscopy observations revealed a complex crystallization process involving heterogeneous nucleation on pre-existing particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
D. V. Louzguine-Luzgin, E. N. Zanaeva, F. R. Pratama, T. Wada, S. Ito
Summary: The structural features of Pd42.5Cu30Ni7.5P20 and Pt42.5Cu27Ni9.5P21 metallic glasses were examined using high-resolution transmission electron microscopy. Pd42.5Cu30Ni7.5P20 exhibited true bulk glass-forming behavior without crystalline particles/nuclei, while Pt42.5Cu27Ni9.5P21 was a crystal growth-controlled bulk glass-former containing nanoparticles with a different chemical composition and an average size of about 1 nm. These structural differences influenced the mechanical properties at room temperature. Thermodynamic calculations supported the observed features.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
S. Romankov, Y. C. Park, Y. Miyauchi, D. V. Louzguine-Luzgin, S. Komarov
Summary: W-based alloyed coatings with variable W content were fabricated on Ti and steel substrates using different combinations of W milling balls. The coatings displayed heterogeneous nanocomposite structures, and the composition and microstructures could be tailored through the selection of milling balls. The hardness and wear resistance of the coatings were influenced by the W content and microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
D. V. Louzguine-Luzgin, K. Shinozaki
Summary: In this study, glassy oxide/metallic composite materials were produced by sintering powdered oxide glass reinforced with metallic glassy ribbons in the supercooled liquid regions. The composite samples exhibited better mechanical properties compared to single phase oxide samples.
