Article
Nanoscience & Nanotechnology
Akihide Hosokawa, Yusuke Hirayama
Summary: Sm2Fe17N3 coarse powder was consolidated into a disc magnet using high-pressure torsion technique and achieved grain subdivision within the powder particles, resulting in a bulk magnet with increased coercivity. The generation of grain subdivision was found to be associated with the motion of dislocations in non-basal planes. However, excessively large strain led to the loss of the hard magnetic phase and the coercivity.
SCRIPTA MATERIALIA
(2023)
Article
Crystallography
Boris B. Straumal, Roman Kulagin, Brigitte Baretzky, Natalia Yu. Anisimova, Mikhail V. Kiselevskiy, Leonid Klinger, Petr B. Straumal, Olga A. Kogtenkova, Ruslan Z. Valiev
Summary: This review discusses the intersection of phase transformations, severe plastic deformation (SPD), and high-entropy alloys (HEA) in materials science. The use of SPD techniques enables the determination of single-phase regions and the formation of nanoparticles in HEAs, influencing their composition, structure, and properties.
Article
Materials Science, Multidisciplinary
Gloria Kirste, Jens Freudenberger, Sabine Wurmehl
Summary: By studying the formation of bulk Mn3Ga alloy over time, this research found that the pre-processing of the alloy has a significant impact on its phase composition and magnetic properties, including a shear-induced back-and-forth transformation between the cubic and hexagonal structures. The results suggest that careful pre-processing allows for precise control over the phase formation and magnetic properties of Mn3Ga alloy.
Article
Materials Science, Multidisciplinary
Xuefeng Liao, Lizhong Zhao, Jiasheng Zhang, Ke Xu, Bang Zhou, Hongya Yu, Xuefeng Zhang, Jean-Marc Greneche, Alex Aubert, Konstantin Skokov, Oliver Gutfleisch, Zhongwu Liu
Summary: Nanocrystalline 2:14:1-type Ce-Fe-B alloy powders have shown potential for low-cost hard magnets. This study successfully fabricated bulk anisotropic Ce-based 2:14:1-type permanent magnets through hot-deformation and investigated the effects of La and Y substitutions. La substitution resulted in a clear preferred orientation, while the addition of Y improved thermal stability. The obtained magnet exhibited good hard magnetic properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Dong-Qin Ma, Zi-Hui Ge, Yun-Fe Cao, He-Wei Ding, Yan-Fei Jiang, Ji-Bing Sun
Summary: The spinodal decomposed Cu-Ni-Fe alloy can exhibit both hard magnetic properties and excellent mechanical toughness, corrosion resistance, and cold workability. The structure formed through the decomposition of ? ? ?1 + ?2 inside the grains plays a key role in endowing the ribbons with hard-magnetic properties. The main factors influencing the magnetic properties include shape anisotropy of ?1 and ?2, the concentration of Fe, Co, Ni in the ?2 phase, and the content of the ? phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Dong Sun, Shuyong Jiang, Yanqiu Zhang, Bingyao Yan, Junbo Yu
Summary: Equiatomic NiTi shape memory alloy subjected to severe plastic deformation through local canning compression exhibits different twin structures after solution treatment and subsequent annealing, which significantly influence the phase transformation behavior of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
A. Sivakumar, S. Kalaiarasi, S. Sahaya Jude Dhas, Abdulrahman I. Almansour, Raju Suresh Kumar, Natarajan Arumugam, S. A. Martin Britto Dhas
Summary: In accordance with the current trend in science and technology, strategic sectors focusing on innovative materials development heavily rely on materials science researchers to meet industrial efficiency and stability requirements. The search for potential materials to fulfill these requirements is an ongoing process, with a recent investigation demonstrating brookite TiO2 as a highly shock-resistant material.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Samuel P. Girdzis, Yu Lin, Linn Leppert, Adam H. Slavney, Sulgiye Park, Karena W. Chapman, Hemamala Karunadasa, Wendy L. Mao
Summary: High-pressure synchrotron X-ray total scattering on Cs2AgBiBr6 revealed local disorder hidden from conventional Bragg analysis, with a better description by a monoclinic space group. Enhanced local disorder upon compression offers new understanding and tuning possibilities for halide perovskite lattices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Zihao Zhang, Chengpeng Yang, Yizhong Guo, Xuegiao Li, Deli Kong, Yan Lu, Changjiang Nie, Lihua Wang
Summary: This study investigates the deformation mechanisms of twin-structured Ni nanowires under bending deformation. It finds that plastic deformation is controlled by dislocations and phase transitions, leading to the formation of grain boundaries.
Article
Physics, Applied
Q. M. Lu, S. Gao, Y. Q. Li, H. G. Zhang, W. Q. Liu, M. Yue
Summary: We achieved ultra-high coercivity in the L1(0)-Mn1.33Ga alloy through hot deformation and identified the hardening mechanism. The hot deformation process resulted in recrystallization and grain refinement, leading to enhanced grain boundary pinning. The magnetic domain observation revealed that both the sub-micro grain boundary and the twin boundary acted as pinning centers for the domain wall.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Guangzong Xing, Takahiro Ishikawa, Yoshio Miura, Takashi Miyake, Terumasa Tadano
Summary: This study investigates the thermodynamic stability of binary R1-xFex compounds using first-principles calculations based on density functional theory at finite temperature. The findings show that entropy contributions, including electronic and vibrational free energies, are essential for accurately predicting the stability of these alloys. The results indicate that vibrational entropy plays a key role in stabilizing various R1-xFex compounds with increasing temperature, suggesting the possibility of synthesizing these compounds at high temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Peiwen Liu, Henggao Xiang, Haitao Li, Xianghe Peng
Summary: It has been found that the synergistic effects of amorphization and dislocations in high-entropy alloys (HEAs) can significantly improve the fracture-resistance. Amorphous structures and dislocations appear simultaneously in HEAs, where the amorphous structures are confined by the surrounding dislocations. This interaction helps to relax the local stress concentration, leading to the enhancement of the fracture-resistance. In contrast, in nickel single crystals, only dislocations appear and fracture is more likely to occur when dislocations are emitted. The length of cracks also affects the evolution of microstructures in HEAs.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Hai Zhang, Zhiyan He, Wenbin Gao
Summary: The effect of severe plastic deformation on microstructure and hardness of 7075 aluminum alloy sheet differed from that of thick samples. Grain refinement was not significant, but precipitation phases MgZn2 were dissolved in the matrix near the surface. Varying densities of dislocations were formed at different depths. The depth of severe plastic deformation layer was 40-70 μm, while the affected depth of hardness was much deeper. The maximum hardness enhancement, a 16% increase compared to the core hardness, occurred at a depth of approximately 150-250 μm below the surface. The change in hardness depended on the competition between precipitation dissolution and dislocation multiplication.
Article
Physics, Applied
T. Z. Shen, H. Y. Song, M. R. An, Y. L. Li
Summary: This study investigates the effects of twin boundary spacing and nickel concentration on the mechanical properties and deformation behavior of nano-twinned HEA through molecular dynamics simulation. The results show that the decrease in twin boundary spacing causes the average flow stress of the HEA to change from strengthening to softening, and the nickel concentration can also affect the mechanical properties of the HEA.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Muhammed Fatih Kilicaslan, Yasin Yilmaz, Bekir Akgul, Hasan Tiryaki
Summary: This study investigates the effects of external magnetic field and flash annealing at different temperatures on the magnetic properties of high Nd content NdFeB magnet alloys. The results show that flash annealing at 710 degrees C for 10 min produces the highest remanence and coercivity, leading to an improvement in the maximum energy product of the magnets.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Applied
I. Gonzalez de Arrieta, L. Gonzalez-Fernandez, T. Echaniz, L. del Campo, D. De Sousa Meneses, G. A. Lopez
Summary: The infrared emittance of single-crystal rutile TiO2 has been measured up to 2000 K in dry air, revealing a strong thermally-induced opacification phenomenon. This can be explained by small-polaron hopping conduction and is much stronger compared to similar phenomena in other oxide materials. The high-temperature optical conductivity shows a thermally activated contribution, with characteristics of small-polarons reinforced by the observation of broad near-infrared bands.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
T. Echaniz, I. Gonzalez de Arrieta, A. Gil-Munoz, J. Fernandez-Pereda, R. Fuente, M. Klimenkov, G. A. Lopez
Summary: It was found that there is a semi-quantitative agreement between the measured spectral directional emissivity data of Eurofer 97 and the predicted values, despite significant differences in resistivity. Additionally, the emissivity data for the polished surface was comparable to Grade 91 steel and slightly lower than the values typically assumed in thermal budget modeling.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Computer Science, Interdisciplinary Applications
Mustafa Tutar, Cihat Emre Ustun, Jose Miguel Campillo-Robles, Raquel Fuente, Silvia Cibrian, Ignacio Arzua, Arturo Fernandez, Gabriel A. Lopez
Summary: This study proposes an optimized computational fluid dynamics modeling framework to simulate combustion and heat transfer phenomena in the radiation section of an industrial SMR furnace. Experimental measurements and comparison with experimental data validate the accuracy of the modeling framework.
COMPUTERS & CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Ilya Lyagin, Nikolay Stepanov, George Frolov, Elena Efremenko
Summary: Fiber materials with pronounced chemical-biological protection can be obtained by combining metal nanoparticles and enzymes. The combination of metal nanoparticles and enzymes is more effective than the combination of enzymes and antibiotics, allowing for reduced application quantities. The modified fiber materials show increased elimination of bacterial cells and the enzymes retain their activity in reaction with organic phosphorus compounds. Different metal nanoparticles exhibit selectivity against different types of bacteria.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Chemistry, Physical
Boris B. Straumal, Anna Korneva, Gabriel A. Lopez, Alexei Kuzmin, Eugen Rabkin, Gregory Gerstein, Alexander B. Straumal, Alena S. Gornakova
Summary: The review analyzed the phenomenon of grain boundary wetting by the second solid phase in high entropy alloys (HEAs). It discussed how the wetting can be incomplete or complete, and how it can be observed in HEAs produced by various technologies. Using grain boundary engineering methods, the wetting by the second solid phase can be employed to improve the properties of HEAs.
Article
Materials Science, Multidisciplinary
Boris B. Straumal, Leonid Klinger, Alexei Kuzmin, Gabriel A. Lopez, Anna Korneva, Alexander B. Straumal, Nikolai Vershinin, Alena S. Gornakova
Summary: This article analyzes the factors affecting the grain boundary wetting in high-entropy alloy (HEA) coatings and their changes, including the composition of the alloy, laser scanning speed, laser beam power, external magnetic field or ultrasonic impact.
Review
Energy & Fuels
Boris Straumal, Anna Korneva, Alexei Kuzmin, Leonid Klinger, Gabriel A. Lopez, Nikolai Vershinin, Alexander Straumal, Alena Gornakova
Summary: High entropy alloys (HEAs), with nearly equal concentration of components, have unique properties and are widely used in various applications. Plasma cladding allows cost-effective coating of large surfaces with HEAs, providing advantages such as low thermal distortion and high energy density. Good metallurgical bonding is achieved between the coating and substrate.
Article
Instruments & Instrumentation
M. Sainz-Menchon, J. Gabirondo-Lopez, I. Gonzalez De Arrieta, T. Echaniz, G. A. Lopez
Summary: Directional spectral emissivity measurements were conducted on a rolled aluminum sheet in vacuum, and the results were compared to literature data and theoretical predictions. The surface state was found to play a crucial role in explaining the observed scatter of values, and the effect of the cold-rolling process on emission was studied.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Sona Valiyaveettil-SobhanRaj, Rosalia Cid, Travis Thompson, Francisco Bonilla, Gabriel A. Lopez, Frederic Aguesse, Montse Casas-Cabanas
Summary: Temperature-assisted densification methods are used to suppress resistive interfaces in oxide-based solid-state batteries. However, the chemical reactivity among different cathode components still poses a challenge. This study evaluates the impact of temperature and heating atmosphere on the LiNi0.6Mn0.2Co0.2O2 (NMC), Li1+xAlxTi2-xP3O12 (LATP), and Ketjenblack (KB) system. The results suggest that the heating atmosphere and reaction mechanism play a role in the degradation and capacity decay of the batteries.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Aitor Bikarregi, Santiago Dominguez, Marta Brizuela, Alejandra Lopez, Ana Suarez-Vega, Cecilia Agustin-Saenz, Micael Presa, Gabriel A. Lopez
Summary: This study presents tube smartisation by directly fabricating a copper-based resistive temperature detector (RTD) on the outer surfaces of tubes. Copper depositions were achieved using mid-frequency and high-power impulse magnetron sputtering techniques. The RTD was protected from external degradation by depositing a silicon oxide film using sol-gel dipping and reactive magnetron sputtering techniques. The electrical characterization of the sensor confirmed its linearity and repeatability.
Article
Chemistry, Physical
Dmitry Gunderov, Karina Kim, Sofia Gunderova, Anna Churakova, Yuri Lebedev, Ruslan Nafikov, Mikhail Derkach, Konstantin Lukashevich, Vadim Sheremetyev, Sergey Prokoshkin
Summary: The phase transformations of Ti-18Zr-15Nb shape memory alloys during heating in different states were studied. The formation of alpha-phase occurred by C-shaped kinetics with a peak temperature near 400-450 degrees C for the quenched state and near 350-450 degrees C for the high-pressure torsion state. The nanostructured state formed as a result of high-pressure torsion suppressed the beta ->omega phase transformation during low-temperature annealing, but activated the beta ->alpha phase transformation.
Article
Chemistry, Physical
Veta Aubakirova, Dmitry Gunderov, Ruzil Farrakhov, Vasily Astanin, Andrey Stotskiy, Arseny Sharipov, Alexey Demin, Leonard Khalilov, Evgeny Parfenov
Summary: This paper investigates the effect of current density distribution on plasma electrolytic oxidation (PEO) process and its resultant coatings on a Zr-1Nb alloy. The distance between the plates in the electrolyzer is evaluated to assess the throwing power of the PEO process. The current density on the facing surfaces of the plates decreases with a smaller distance, impacting the surface morphology and corrosion resistance of the PEO coatings.
Article
Chemistry, Physical
Liam J. W. Johnson, Goncalo Paulo, Luis Bartolome, Eder Amayuelas, Alberto Gubbiotti, Diego Mirani, Andrea Le Donne, Gabriel A. Lopez, Giulia Grancini, Pawel Zajdel, Simone Meloni, Alberto Giacomello, Yaroslav Grosu
Summary: The behavior of Heterogeneous Lyophobic Systems (HLSs) composed of porous materials and non-wetting liquids is influenced by various structural parameters. This study investigates the dependence of intrusion pressure and intruded volume on crystallite size, examining the role of hydrogen bonding in facilitating intrusion. Experimental measurements, molecular dynamics simulations, and stochastic modeling reveal that a reduction in crystallite size leads to decreased intrusion and extrusion pressures below 100 nm, attributed to a greater number of cages in proximity to bulk water and the stabilization of intruded state via cross-cage hydrogen bonds.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
L. Usategui, I. Lopez-Ferreno, T. Echaniz, M. Sainz-Menchon, M. Musi, H. Clemens, G. A. Lopez
Summary: This study investigates the directional spectral emissivity of two titanium aluminide alloys, 4822 and TNM, commonly used in the aerospace industry. The results show that the TNM alloy exhibits higher emissivity values and better oxidation resistance at lower temperatures. The microstructural characterization reveals the formation of four layers in the oxide scale, which significantly affects the overall radiative behavior of the alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Computer Science, Information Systems
Artzai Picon, Aitor Alvarez-Gila, Jose Antonio Arteche, Gabriel A. Lopez, Asier Vicente
Summary: Estimating the temperature of hot emissive samples in harsh industrial environments is crucial yet challenging. Current remote methods require information on the emissivity of the sample, which is dependent on the sample composition and temperature and is difficult to measure.
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.
