Article
Chemistry, Physical
Young Jun Kwon, Yoon Jung Won, Ki Sub Cho
Summary: This study investigates the phase stability of AlCuxNiCoTi high-entropy alloys with varying amounts of copper. By using thermodynamic models and calculating the Gibbs energy of mixing, the study predicts stable phases in multicomponent alloys. The influence of alloying elements on the phase stability of multicomponent alloys is discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Manish N. Borse, M. Manokaran, Sushil G. Yebaji, Swamini Chopra, Ayush Sourav, Bhaskar Majumdar, Arvindha Babu, Shanmugasundaram Thangaraju
Summary: This work presents the synthesis and characterization of bulk Y2Ti2O7-aluminum nano-composites using high energy ball-milling followed by spark plasma sintering. Stable Y2Ti2O7 nanoparticles were prepared by mechanical alloying and calcination, and then dispersed in an aluminum matrix for reinforcement. The introduction of 1wt% Y2Ti2O7 significantly enhanced the compressive yield strength of the material.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Liu Junwei, Li Yong, Lu Shiqiang, Wan Jun, Gao Wenliang
Summary: The crystallization mechanism of Ti44Ni47Nb9 amorphous alloy was studied through mechanical alloying, indicating that the best crystallization effect was achieved at 575 degrees C for 30 minutes. The glass transition temperature, initial crystallization temperature, and peak crystallization temperature all increased with heating rate, showing kinetic effects. The apparent activation energies for different crystallization stages were calculated using the Ozawa equation.
Article
Physics, Condensed Matter
Fredy Josealdo Castillo Plata, Jesus Noe Rivera Olvera, V. Garibay Febles, Lucia Graciela Diaz Barriga
Summary: In this study, the microstructural evolution of the W-Mo-Ni-C system was investigated using thermodynamic analysis and X-ray diffraction. The diffusion of carbon and the formation of alloys were observed at specific time points, supporting the hypothesis that carbide formation requires more energy. It was also found that the materials obtained through mechanical alloying were out of equilibrium.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
C. Suryanarayana
Summary: Metallic glasses or amorphous solids undergo mechanical crystallization, either ex situ or in situ, through mechanical deformation or continued milling. This article reviews the current literature on mechanical crystallization, focusing on in situ processes, and explores the potential of this interesting route for producing alloys with amorphous, crystalline, or mixed phases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Liang Dong, Yun-Jun Xu, Cong Sui, Yang Zhao, Li-Bo Mao, Denis Gebauer, Rose Rosenberg, Jonathan Avaro, Ya-Dong Wu, Huai-Ling Gao, Zhao Pan, Hui-Qin Wen, Xu Yan, Fei Li, Yang Lu, Helmut Colfen, Shu-Hong Yu
Summary: This study successfully combines gadolinium ions with amorphous calcium carbonate to produce stable paramagnetic amorphous carbonate nanoclusters, which have high contrast and improved biocompatibility, and they provide a promising strategy for designing magnetic resonance contrast agents.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
K. Raja Rao, Sudip K. Sinha
Summary: Fine powders of nanocrystalline Y2O3 are dispersed and mechanically alloyed in an equiatomic CrCuFeNiZn multicomponent alloy using high energy ball milling technique. The X-ray Diffraction (XRD) analysis reveals the formation of stable phases 'FCC' and 'BCC' after milling for about 30 hours, in addition to minor amount of YZn5 intermetallic phase with hexagonal crystal structure. The study suggests that this yttria doped alloy can be a potential candidate material for core components in nuclear reactors.
Article
Materials Science, Multidisciplinary
Niuchang Ouyang, Chen Wang, Yue Chen
Summary: Through atomic-level investigations, we have discovered the phonon and thermal transport properties of strongly anharmonic alloy-based thermoelectric materials and revealed the correlation between the decreased thermal conductivity of SnS0.75Se0.25 and randomization of Se atoms.
MATERIALS TODAY PHYSICS
(2022)
Article
Multidisciplinary Sciences
Zhao Mu, Kangren Kong, Kai Jiang, Hongliang Dong, Xurong Xu, Zhaoming Liu, Ruikang Tang
Summary: By regulating structurally bound water and external pressure, we manufactured transparent inorganic monoliths with continuous structures, boasting mechanical strength comparable to single-crystal calcite.
Article
Chemistry, Physical
Ana Cotai, Bogdan Viorel Neamtu, Florin Popa, Traian Florin Marinca, Olivier Isnard, Ionel Chicinas
Summary: This study compares HITPERM type alloys prepared by wet and dry mechanical alloying, finding that amorphization occurred after 40 hours of milling in wet conditions, but not after 100 hours in dry conditions. Various analyses were performed to investigate the thermal stability and crystallization kinetics of the amorphous powders.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Z. Y. Xiong, W. W. Xu, X. G. Gong, Z. N. Li, X. Gao, Y. H. Guo, L. J. Chen, Y. C. You, J. J. Ruan
Summary: This study systematically explores the independent/synergetic effects of various alloying elements on the stabilities of the matrix and precipitates in Inconel 718. High-throughput calculations are employed to map the mechanical properties versus chemical compositions. The results show that Al and Ti have a synergistic effect on the stability of the precipitates, while W is detrimental. The effect of Co depends on its sublattice position and the Al and Ti contents. Theoretical composition ranges for desired properties are identified through mechanical mapping.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
X. F. Gong, Z. H. Gao, L. P. Nie, S. Qiu, Q. Yu, H. Wu, G. P. Zheng, Z. B. Jiao
Summary: This study systematically investigated the effects of 3d, 4d, and 5d transition elements on the phase stability, mechanical properties, and deformation behavior of L12 Co-Ti-based alloys using first-principles calculations. The results showed that certain transition elements tend to occupy specific sites, reducing the structural stability of the alloys. The analysis also revealed that the strengthening of the alloys is attributed to the strong covalent character of the Co-M bonds. The study provides insights into the fundamental understanding of multicomponent L12 compounds and offers guidelines for designing superior Co-based superalloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Hao Yang, Jin-Han Yang, Ying Zhao, Han Ma, Yanzhong Tian, Minghui Cai, Shuai Tang, Yandong Liu, Xiang Zhao, Hai-Le Yan, Liang Zuo
Summary: The impacts of Mn alloying on lattice stabilities, magnetic properties, electronic structures, and phase transitions in Fe16-xMnx alloys (x = 0, 1, and 2) have been studied using first-principles calculations. The results show that Mn prefers ferromagnetic and antiferromagnetic interactions in the bcc and fcc phases, respectively. The magnetic moment of Mn is smaller and larger than that of Fe in the bcc and fcc phases, respectively. The site occupations of Mn in different phases can be understood from the electronic density of states near the Fermi energy, suggesting the possibility of element redistribution during phase transitions. The antiferromagnetism is identified as the main reason for the enhanced stability of the fcc phase by Mn alloying.
Article
Engineering, Mechanical
M. Adamzadeh, M. H. Enayati, M. Shamanian, P. Khayambashi
Summary: This study investigated the microstructure, microhardness, and tribological behavior of Ni-Nb amorphous coating fabricated by mechanical alloying method at different annealing timepoints. It was found that the microhardness of the coating initially decreased after 30 min of annealing but significantly increased with longer annealing time. The changes were attributed to the formation of nanocrystalline intermetallic compounds in the amorphous matrix. The wear resistance of the coatings showed a similar trend with microhardness up to 120 min of annealing but deviated from the microhardness trend after 240 min. Delamination and oxidative wear mechanisms were identified as the dominant wear mechanisms.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Manufacturing
Chengde Gao, Shuai Tang, Shuo Zhao, Zhenyu Zhao, Hao Pan, Cijun Shuai
Summary: In this study, non-equilibrium Zn60Zr40 amorphous powders were synthesized through mechanical alloying (MA) and then consolidated into amorphous/crystalline Zn60Zr40 alloys using selective laser melting (SLM). The MA process disrupted the atomic periodicity of the powders, leading to crystalline-to-amorphous transformation. The amorphisation of the powders increased with milling time and achieved a fully amorphous structure after 30 hours of milling. The ultra-high cooling rate during SLM prevented long-range atomic diffusion and allowed for the successful preservation of the amorphous phase, resulting in amorphous/crystalline Zn60Zr40 alloys. These alloys exhibited superior compressive yield strength and microhardness.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Review
Energy & Fuels
Sebastiano Garroni, Antonio Santoru, Hujun Cao, Martin Dornheim, Thomas Klassen, Chiara Milanese, Fabiana Gennari, Claudio Pistidda
Article
Nuclear Science & Technology
I. A. Carbajal-Ramos, J. L. Zacur, J. Andrade-Gamboa, N. Palacios, M. Rodriguez, F. C. Gennari
FUSION ENGINEERING AND DESIGN
(2018)
Article
Chemistry, Physical
Nina Senes, Luisa Fernandez Albanesi, Sebastiano Garroni, Antonio Santoru, Claudio Pistidda, Gabriele Mulas, Stefano Enzo, Fabiana Gennari
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Chemistry, Physical
G. Amica, S. Enzo, P. Arneodo Larochette, F. C. Gennari
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Chemistry, Physical
M. L. Grasso, M. V. Blanco, F. Cova, J. A. Gonzalez, P. Arneodo Larochette, F. C. Gennari
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Materials Science, Multidisciplinary
Julian Puszkiel, M. Victoria Castro Riglos, Jose M. Ramallo-Lopez, Martin Mizrahi, Thomas Gemming, Claudio Pistidda, Pierre Arneodo Larochette, Jose Bellosta von Colbe, Thomas Klassen, Martin Dornheim, Fabiana Gennari
Article
Chemistry, Physical
Aurelien Gasnier, Margaux Luguet, Amaru Gonzalez Pereira, Horacio Troiani, Guillermo Zampieri, Fabiana C. Gennari
Article
Chemistry, Physical
Nadia S. Gamba, Julian Puszkiel, Pierre Arneodo Larochette, Fabiana C. Gennari
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Engineering, Chemical
Nadia Gamba, Valeria Farina, Sebastiano Garroni, Gabriele Mulas, Fabiana Gennari
Summary: Wet mechanochemical processing of olivine under a CO2 atmosphere promotes CO2 sequestration as MgCO3 and CO2 reduction to CH4. Prolonged milling times stimulate CO2 conversion to CH4 but decrease the carbonation reaction rate.
Article
Chemistry, Physical
Maria Laura Grasso, Sara Rozas Azcona, Pierre Arneodo Larochette, Santiago Aparicio, Fabiana Gennari
Summary: The thermochemical reaction between MgH2 and Li2CO3, with and without nickel as a catalyst, was investigated for CO2 transformation into fuels. Successful production of high-yield CH4 was achieved by controlling reaction conditions such as microstructural refining, MgH2:Li2CO3 molar ratio, temperature, and time. The presence of nickel catalyst significantly improved the methane yield. The results demonstrate the potential of thermochemical activation of MgH2:Li2CO3 mixture for CH4 generation and CO2 utilization.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Alberto Gutierrez, Juan Antonio Tamayo-Ramos, Sonia Martel, Rocio Barros, Alfredo Bol, Fabiana Cristina Gennari, Pierre Arneodo Larochette, Mert Atilhan, Santiago Aparicio
Summary: Lithium silicates have potential as high-temperature sorbents for CO2 capture. This study investigates the properties and CO2 interaction of Li4SiO4 and Li3NaSiO4 using density functional theory. The results demonstrate strong chemisorption of CO2 on these materials, leading to changes in their structure and charge.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Maria Valeria Blanco, Paula Macarena Abdala, Fabiana Gennari, Federico Cova
Summary: This study provides a detailed investigation on the synthesis of Na2TiO3 and its complex reaction mechanism at high temperatures under carbonation conditions. Real-time in situ experiments reveal thermally-driven phase transitions derived from the structural instability of the material, distinguishing them from carbonation processes.
REACTION CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Guillermina Amica, Sara Rozas Azcona, Santiago Aparicio, Fabiana C. Gennari
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
M. L. Grasso, J. Puszkiel, F. C. Gennari, A. Santoru, M. Dornheim, C. Pistidda
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
Maria L. Grasso, Julian Puszkiel, Luisa Fernandez Albanesi, Martin Dornheim, Claudio Pistidda, Fabiana C. Gennari
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
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)