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
Materials Science, Multidisciplinary
Antoine Cornet, Gaston Garbarino, Federico Zontone, Yuriy Chushkin, Jeroen Jacobs, Eloi Pineda, Thierry Deschamps, Shubin Li, Alberto Ronca, Jie Shen, Guillaume Morard, Nico Neuber, Maximilian Frey, Ralf Busch, Isabella Gallino, Mohamed Mezouar, Gavin Vaughan, Beatrice Ruta
Summary: By combining the brightest x-rays available in synchrotrons with cutting edge high pressure technologies, this study provides direct evidence of the microscopic structural and dynamical mechanisms occurring under in-situ high pressure compression and decompression in metallic glasses. The results show that while pressure promotes density increasing through quasi-elastic structural deformations, the atomic mobility exhibits a hysteresis and is enhanced up to a factor 15 even at temperatures well below the glass transition. This surprising behavior results from a competition between fast avalanche-like atomic rearrangements and slow relaxation processes triggered by an anomalous super-diffusive collective particle displacement.
Article
Engineering, Mechanical
Wei-Hui Lin, Chong-Min She, Chun-Yu Zhang, Paulo S. Branicio, Zhen - Dong Sha
Summary: The mechanical properties of cellular metallic glasses are influenced by the shape of their cellular structures. Random structures with uniform porosity show higher yield strength and Young's modulus compared to microlattice structures. The chiral structure displays the highest Young's modulus, while stochastic cellular structures exhibit higher energy absorption capacity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Nanoscience & Nanotechnology
Alexander Firlus, Mihai Stoica, Gavin B. M. Vaughan, Robin E. Schaeublin, Joerg F. Loeffler
Summary: Fe-based bulk metallic glasses exhibit an anomalously low coefficient of thermal expansion known as the Invar effect. This effect is influenced by rare earth elements but the extent of influence from other elements is unclear.
MATERIALS TODAY NANO
(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
Y. H. Meng, S. Y. Zhang, W. H. Zhou, J. H. Yao, S. N. Liu, S. Lan, Y. Li
Summary: Structural relaxation and subsequent rejuvenation through thermal treatment can improve the plasticity and fracture toughness of metallic glasses. The recovery of loosely packed regions in the atomic structure during annealing contributes to the observed rejuvenation. Tailoring the mechanical properties of metallic glasses can be achieved by controlling the annealing and thermal treatment conditions.
Review
Chemistry, Physical
Haojie Luo, Yulei Du
Summary: This review summarizes the latest progress in the field of laser powder bed fusion (LPBF) additively manufactured bulk metallic glasses (BMGs), focusing on their mechanical properties. The review discusses the BMG alloy systems that have been additively manufactured using LPBF, and clarifies the mechanical properties of LPBF-fabricated BMGs, including micro- and nano-hardness, micropillar compressive performance, and macro-compressive and tensile performance. The relationship between the mechanical properties and microstructure of LPBF-produced BMGs is also analyzed. Measures for improving the mechanical properties of LPBF-fabricated BMGs are discussed.
Article
Chemistry, Physical
Dandan Liang, Jo-Chi Tseng, Xiaodi Liu, Yuanfei Cai, Gang Xu, Jun Shen
Summary: This study investigated the effects of annealing at different temperatures on the structural heterogeneity, mechanical property, electrochemical behavior, and passive film characteristics of Fe-Cr-Mo-W-C-B-Y metallic glasses (MGs). Results showed that annealing below the glass transition temperature enhanced corrosion resistance by forming a protective passive film, while annealing in the supercooled liquid region led to destabilized passive film and deteriorated corrosion resistance. Structural heterogeneity plays a crucial role in tuning the corrosion performance of MGs.
Article
Chemistry, Physical
A. H. Cai, G. Zhou, P. W. Li, D. W. Ding, Q. An, G. J. Zhou, Q. Yang, Y. P. Lin, H. Mao
Summary: The relationship between microstructure and mechanical property of three Zr-based bulk metallic glasses (BMGs) was investigated. The results show that the content of CuZr2-type phase increases but that of Zr6Al2Ni-type phase decreases with increasing Zr content. The plastic flow stress and strain decrease while the plasticity increases with increasing fraction of CuZr2-type cluster, which is named as geometrically unfavorable motifs (GUMs). The fitting parameters from cumulative probability statistics provide valuable clues for investigating the plastic flow and plasticity of the BMGs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Bian Zhou, Ming-fei Li, Fan Xiong, Liang Yang
Summary: The study reveals that cooling rate affects the mechanical properties of metallic glasses, with MG prepared at lower cooling rate having higher yield strength but lower plasticity, and higher cooling rate leading to more free volumes.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
A. Lindsay Greer, Miguel B. Costa, Owain S. Houghton
Summary: There have been remarkable advances in the field of metallic glasses over the last 50 years, including an expanded range of compositions, improved production and shaping techniques, and the discovery of property combinations offering unparalleled performance. Ongoing research continues to provide fundamental insights into the structure and properties of glasses and liquids. This article focuses on the latest advances in understanding and the rapidly expanding prospects for applications.
Article
Materials Science, Multidisciplinary
Chang Liu, Suyue Yuan, Jinwoo Im, Felipe P. J. de Barros, Sami F. Masri, Paulo S. Branicio
Summary: Molecular dynamics simulations are used to investigate the mechanical properties of nanoporous CuxZr1-x metallic glasses. The study reveals a strong correlation between Young's modulus, Ultimate Tensile Strength (UTS), and porosity/composition. Increasing porosity leads to a change in nanoporous topology and a transition from brittle to ductile deformation and failure mechanisms. Genetic Programming (GP) is employed to establish scaling laws for E and UTS as a function of porosity and composition, accurately predicting their values in the entire range considered.
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
Materials Science, Ceramics
Nikolai V. Priezjev
Summary: This study investigates the influence of static stress and alternating loading direction on the potential energy and mechanical properties of amorphous alloys using molecular dynamics simulations. It was found that at sufficiently large values of static stress, the binary glass becomes rejuvenated through collective, irreversible rearrangements of atoms. Including additional static stress orientation in the loading protocol amplifies the rejuvenation effect, leading to improvements in the mechanical properties of metallic glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Multidisciplinary
Yu-Chia Yang, Zhenhai Xia, Sundeep Mukherjee
Summary: This paper explores the relationship between atomic structure and mechanical properties of metallic glasses by using molecular dynamics simulation. The study found that changes in mechanical properties can be linked to short- and medium-range ordering in the atomic structure. Structural statistics, such as Voronoi analysis, were used to determine the mechanical properties of the metallic glass.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)