Article
Metallurgy & Metallurgical Engineering
Chang Liu, Qing Wang, Bin Han, Junhua Luan, Ji-Jung Kai, Chain-Tsuan Liu, Ge Wu, Jian Lu
Summary: Dual-phase metallic glasses with nanostructured Ca-rich amorphous phases exhibit a dense corrosion layer that protects the material from further corrosion, resulting in a corrosion rate 77% lower than pure Mg.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Ceramics
Xiaochang Tang, Laiquan Shen, Huaping Zhang, Wanghui Li, Weihua Wang
Summary: Metallic glasses have potential as engineering materials, but their limited ductility is a major challenge. This study investigates the formation of nano-corrugations (NCs) in brittle metallic glasses and proposes a stress-driven cavitation process as the underlying mechanism. The findings shed light on the understanding of dynamic fracture propagation in amorphous materials and have implications for predicting damage development.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Yuhang Zhang, Jiejie Li, Qingsong Zhang, Suhang Ding, Wenwang Wu, Re Xia
Summary: By utilizing the size effect of mechanical properties at the nanoscale and rational structural design, topological design of Cu50Zr50 tetrachiral nanostructured metallic glasses (CNMGs) is proposed. Molecular dynamics simulations of uniaxial tension show that the tetrachiral structure can be used to design nanostructured metallic glasses (MGs) with improved elastic limit, excellent auxeticity, and enhanced ductility. CNMGs with large cavity radii exhibit a superior combination of high strength, remarkable ductility, and lightweight, which is different from traditional nanoporous materials.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Automation & Control Systems
Weijie Chang, Xiangxiang Li, Haidong Yang, Junsheng Zhang, Juchen Zhang, Huohong Tang, Shunhua Chen
Summary: This study compared the performance of a Zr-based BMG, heat-treated BMG, and industrial pure zirconium in WEDM. The results showed that both BMG and HBMG had better cutting efficiency and surface roughness compared to Zr702. The cutting efficiency and surface roughness of BMG were mainly dependent on its unique physical properties inherited from the metastable atomic structures. The key processing parameters affecting the cutting efficiency were pulse type, pulse-on time, pulse-off time, and power tubes, while the surface roughness was mainly affected by pulse type, pulse-on time, and power tubes.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Alexander Firlus, Mihai Stoica, Stefan Michalik, Robin E. Schaeublin, Joerg F. Loeffler
Summary: The Invar effect in Fe-based bulk metallic glasses is widely observed, but its manifestation at the atomic scale is not well understood. In this study, in-situ X-ray diffraction was used to investigate the structural transformations of two bulk metallic glasses, revealing that the Invar effect is consistent with macroscopic thermal expansion and correlated with Fe-Fe pair distance.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Y. Song, Y. Teng, Z. D. Sha
Summary: It has been found that hydrogen microalloying can cause a transition in the failure mechanism of metallic glasses from shear banding to cracking. A theoretical model based on the concept of energetic model is proposed to rationalize this transition. Cracking behavior becomes more significant with increasing hydrogen content, advancing our understanding of the failure mechanism in hydrogen-alloyed metallic glasses.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Lingyi Meng, Xiaohu Yao
Summary: Metallic glasses have short-range order but lack long-range order. The short-range order is mostly found in dominant clusters with higher local order metrics, while medium-range order is mainly represented by Bergman-type order centered on icosahedral clusters. With increasing length scale, the correlation between neighboring atoms decreases, including the icosahedral cluster network.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Jing Jiang, Zhen Lu, Jie Shen, Takeshi Wada, Hidemi Kato, Mingwei Chen
Summary: The study reveals that high entropy metallic glasses exhibit a depressed dynamical glass transition phenomenon, with HEMGs having moderate calorimetric T-g showing the highest T-alpha and the maximum activation energy of alpha-relaxation. This decoupling of glass transitions from thermal and mechanical measurements demonstrates the impact of high configurational entropy on the structure and dynamics of supercooled liquids and metallic glasses.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Z. Q. Zhou, Q. F. He, X. D. Liu, Q. Wang, J. H. Luan, C. T. Liu, Y. Yang
Summary: This study developed a hybrid machine learning model for compositional design of metallic glasses based on a database of -5000 different compositions, providing a new approach for MG design. The hybrid model was validated numerically and experimentally, enabling accelerated design and expanded applications of MGs.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Monika Antoni, Florian Spieckermann, Niklas Plutta, Christoph Gammer, Marlene Kapp, Parthiban Ramasamy, Christian Polak, Reinhard Pippan, Michael J. J. Zehetbauer, Juergen Eckert
Summary: The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on Fe73.9Cu1Nb3Si15.5B6.6 and Fe81.2Co4Si0.5B9.5P4Cu0.8 iron-based metallic glasses were compared. HPT processing extended the consolidation and deformation ranges for Fe73.9Cu1Nb3Si15.5B6.6, and achieved consolidation and deformation with minimum cracks for Fe81.2Co4Si0.5B9.5P4Cu0.8 for the first time. Various analyses revealed that Fe81.2Co4Si0.5B9.5P4Cu0.8 exhibited HPT-induced crystallization phenomena, while Fe73.9Cu1Nb3Si15.5B6.6 did not crystallize even at high HPT-deformation degrees.
Article
Nanoscience & Nanotechnology
Ehsan Ghasali, Davoud Ghahremani, Yasin Orooji
Summary: Ti laminated composites were successfully prepared by using metallic additive powders between Ti sheets and spark plasma sintering process. Different metallic additives such as Mo, Cr, Si, and Co were inserted between Ti layers to form unique composite structures, resulting in varied mechanical properties. The highest Vickers hardness and bending strength were observed in Ti-Si and Ti-Cr laminated composites, respectively, indicating the potential for tailored performance through appropriate additive selection.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Article
Nanoscience & Nanotechnology
Sidra Jilani, Leah S. Koloadin, David M. Miskovic, Kevin J. Laws
Summary: Magnesium-based metallic glasses have been developed with high casting thicknesses and excellent mechanical properties, suitable for use as resorbable biological implant materials. The alloys exhibit promising potential in the field of biomaterials.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Jiazi Bi, Xinquan Wei, Xiaobin Liu, Ran Li, Ruijuan Xiao, Tao Zhang
Summary: A family of novel Os-Co-Ta-B high-temperature bulk metallic glasses (HTBMGs) with high glass transition temperature, Vickers microhardness, and compressive strength was fabricated by introducing high-modulus refractory metal Os and strong-covalent metalloid B. The impressive strength is attributed to the strong bond characteristics especially for Ta-Os and B-B bonds. The castable OsCo-based HTBMGs with superior mechanical properties and high thermal stabilities are significant for high-temperature applications as advanced structural materials.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
S. Leila Panahi, Jordina Fornell, Catalin Popescu, Eloi Pineda, Jordi Sort, Pere Bruna
Summary: New high-entropy metallic glasses were produced by adding B and Si to the Fe25Co25Cr25Ni25 high entropy alloy, resulting in extremely hard materials through structural relaxation and nanocrystallization. The study explored the effects of composition and annealing treatments on structure and mechanical properties, finding that the relative amount of B and Si determines the main nanocrystalline phase and influences mechanical behavior.
Article
Chemistry, Physical
Yuyang Zhang, Shun-Xing Liang, Zihao Huang, Ruichen Shi, Peixin Fu, Jingtao Qi, Lai-Chang Zhang, Yuanzheng Yang
Summary: Recent advances in metallic glass catalysts for wastewater treatment have shown promising progress. However, the engineering of active sites on metallic glass catalysts is still limited due to their low surface area. In this study, MnSiB metallic glass catalysts were developed and the B content was modulated to engineer the surface active sites. It was found that Mn73Si16B11 metallic glass ribbons exhibited the best catalytic ability, degrading five organic dyes completely within 30 minutes with a low activation energy of 11.5 kJ mol-1. The study also revealed the role of B in modifying the surface activity of metallic glass catalysts, which contributes to the design of efficient and green catalysts.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhili Wang, Jing Du, Yongzheng Zhang, Jiuhui Han, Shouqiang Huang, Akihiko Hirata, Mingwei Chen
Article
Multidisciplinary Sciences
Yuan Tian, Wei Jiao, Pan Liu, Shuangxi Song, Zhen Lu, Akihiko Hirata, Mingwei Chen
NATURE COMMUNICATIONS
(2019)
Article
Chemistry, Physical
Chen Hou, Jiuhui Han, Pan Liu, Chuchu Yang, Gang Huang, Takeshi Fujita, Akihiko Hirata, Mingwei Chen
ADVANCED ENERGY MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Pan Liu, Qing Chen, Yoshikazu Ito, Jiuhui Han, Shufen Chu, Xiaodong Wang, Kolan Madhav Reddy, Shuangxi Song, Akihiko Hirata, Mingwei Chen
Article
Physics, Applied
Yu Wen, Ayako Hashimoto, Abdillah Sani Bin Mohd Najib, Akihiko Hirata, Hideki Abe
Summary: This study presents the fabrication of metal-oxide nanocomposite Pt#CeO2 and classifies samples with different nanostructures based on topological measures. The nanostructure and oxygen ionic conductivity properties were found to change as the topological measures varied, demonstrating correlations between the structural characteristics and ionic transport properties.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Zhen Lu, Fan Zhang, Daixiu Wei, Jiuhui Han, Yanjie Xia, Jing Jiang, Mingwang Zhong, Akihiko Hirata, Kentaro Watanabe, Alain Karma, Jonah Erlebacher, Mingwei Chen
Summary: The study systematically investigated the kinetics and rate-controlling factors of vapor phase dealloying, and proposed a model to quantitatively describe the dealloying process. It was found that the dealloying velocity exhibits a transition from linear to power law behavior at a critical depth, resulting from the interplay between the dealloying process and microstructure.
Article
Chemistry, Physical
Hiroshi Nakajima, Hirofumi Tsukasaki, Jiong Ding, Takuya Kimura, Takumi Nakano, Akira Nasu, Akihiko Hirata, Atsushi Sakuda, Akitoshi Hayashi, Shigeo Mori
Summary: All-solid-state sodium batteries show promise for the future due to limited lithium resources. A high conductivity electrolyte is crucial for practical sodium batteries. The study demonstrates that cubic Na3PS4 with nanosized crystallites and a crystallite-amorphous domain composite exhibit increased conductivity compared to the tetragonal phase with micro-sized crystallites.
JOURNAL OF POWER SOURCES
(2021)
Article
Instruments & Instrumentation
Akihiko Hirata
Summary: This study proposes a virtual angstrom-beam electron diffraction analysis method for analyzing amorphous structure models obtained through molecular dynamics simulations. It calculates local electron diffraction patterns of the models at equal intervals and further analyzes the local structures that generate paired diffraction spots by combining them with Fourier transform and Voronoi polyhedral analysis. The analysis on an example of Zr80Pt20 reveals the formation of an aggregate of coordination polyhedra that generate similar diffraction patterns, and the existence of certain orientational relationships that enhance the intensity of the diffraction spots.
QUANTUM BEAM SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Akihiko Hirata, Tomohide Wada, Ippei Obayashi, Yasuaki Hiraoka
COMMUNICATIONS MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Anh Khoa Augustin Lu, Kengo Nishio, Tetsuya Morishita, Koji Ohara, Zhen Lu, Akihiko Hirata
Article
Materials Science, Multidisciplinary
Y. Q. Zeng, J. S. Yu, Y. Tian, A. Hirata, T. Fujita, X. H. Zhang, N. Nishiyama, H. Kato, J. Q. Jiang, A. Inoue, M. W. Chen
Article
Materials Science, Ceramics
Yohei Onodera, Shinji Kohara, Shuta Tahara, Atsunobu Masuno, Hiroyuki Inoue, Motoki Shiga, Akihiko Hirata, Koichi Tsuchiya, Yasuaki Hiraoka, Ippei Obayashi, Koji Ohara, Akitoshi Mizuno, Osami Sakata
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2019)
Article
Materials Science, Multidisciplinary
X. D. Xu, S. Guo, T. G. Nieh, C. T. Liu, A. Hirata, M. W. Chen
Article
Materials Science, Multidisciplinary
X. D. Xu, S. Y. Chen, Y. Ren, A. Hirata, T. Fujita, P. K. Liaw, M. W. Chen
Article
Materials Science, Multidisciplinary
M. Murakami, S. Kohara, N. Kitamura, J. Akola, H. Inoue, A. Hirata, Y. Hiraoka, Y. Onodera, I Obayashi, J. Kalikka, N. Hirao, T. Musso, A. S. Foster, Y. Idemoto, O. Sakata, Y. Ohishi
