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
Weisen Huang, Xuefeng Liao, Jiayi He, Hongya Yu, Zhongwu Liu
Summary: This study investigates and compares the microstructure, magnetic properties, thermal stability, corrosion resistance, and mechanical properties of bonded (La,Ce,Y)-Fe-B magnet with Nd-Fe-B and (Nd,La,Ce)-Fe-B magnets. The results show that bonded (La,Ce,Y)-Fe-B magnet exhibits a combination of magnetic properties with lower coercivity but higher performance-to-cost ratio compared to other magnets. It also demonstrates better thermal stability and corrosion resistance. The study suggests that bonded (La,Ce,Y)-Fe-B magnet has great potential for industrial applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jungryang Kim, Shusuke Okada, Kenta Takagi
Summary: This study investigates the elemental substitution of Sm in the Sm-Fe system and synthesizes Sm-X-Fe powders by a low-temperature reduction-diffusion method. The results indicate that all additional elements can substitute for Sm, and the substitution of Zr and Hf shows the potential to increase Fe content.
Article
Chemistry, Physical
Gabriel Gomez Eslava, Masaaki Ito, Claire Colin, Masao Yano, Tetsuya Shoji, Akira Kato, Emmanuelle Suard, Nora M. Dempsey, Dominique Givord
Summary: The study revealed that atom substitution in Nd-2(Fe1-xCox)(14)B, Y-2(Fe1-xCox)(14)B and Ce-2(Fe1-xCox)(14)B compounds shows some regularity, depending on the ratio of Co to Fe content. Steric hindrance primarily determines atom substitution, and enthalpy of mixing must also be considered for a more accurate description of Co preferential occupancies.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Munzali Musa, Xin Song, Xianglong Zhou, Wentao Jia, Tao Yuan, Tianyu Ma, Xiaobing Ren
Summary: Grain boundaries with sparse 1:5H precipitates are considered as the primary demagnetization sites in pinning-controlled 2:17-type Sm-Co-Fe-Cu-Zr permanent magnets, leading to poor magnetic properties. TEM investigations reveal that grain boundary regions contain larger 2:17R nanovariants, less SFs, and fewer defects-aggregated cell boundaries compared to grain interiors, indicating that early decomposition preferably occurs at grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yuye Wu, Konstantin P. Skokov, Lukas Schafer, Fernando Maccari, Alex Aubert, Hao Xu, Haichen Wu, Chengbao Jiang, Oliver Gutfleisch
Summary: We report on the microstructure, hard magnetic properties, and thermal stability of hot-compacted nanocrystalline (Nd0.85Ce0.15)15(Fe1-xCox)7(8)B(7) permanent magnets. The substitution of Fe by Co influences the grain boundary phase composition and degrades the coercivity at lower Co concentrations (x < 0.3). At higher Co concentrations (x >= 0.6), the absence of a grain boundary phase leads to strong magnetic coupling. Additional RE(Fe,Co)2, RE(Fe,Co)4B, and RECo5 phases gradually form with increasing Co concentration (x > 0.6). A new type of microstructure with nanograins and good thermal stability is observed at x = 0.4 and 0.6. In (Nd0.85Ce0.15)(15)(Fe0.4Co0.6)78B-7 magnets, the temperature coefficient of coercivity exceeds 0.3%/K within the temperature range of 300 K-500 K and 0.23%/K for the temperature range of 300 K-650 K, demonstrating the potential for designing highly thermal-stable permanent magnets.
Article
Materials Science, Multidisciplinary
Bang Zhou, Weisen Huang, Wenbing Fan, Hongrui Zhang, Hongya Yu, Kewen Long, Zhongwu Liu
Summary: The microstructure, magnetic properties, corrosion and aging resistance, and mechanical properties of Nd-Fe-B, (Nd, La, Ce)-Fe-B, and (Ce, La, Y)-Fe-B rubber magnets were investigated. The study found that increasing the filling ratio and particle size improves the magnetic properties and tensile strength. The full high-abundance (Ce, La, Y)-Fe-B rubber magnet showed competitive advantage in performance stability.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Long Luo, Yiming Li, Zeming Yuan, Suxia Liu, Ajit Singh, Fei Yang, Baoquan Li, Lirong Li, Yongzhi Li
Summary: In this study, medium entropy solid solution alloys were designed and investigated. The alloys with nanocrystals exhibited excellent hydrogen absorption kinetics, showing shorter uptake time and higher capacity than reported alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Anhua Li, Haibo Feng, Wei Yang, Wei Li
Summary: The phase constitutions and microstructure characteristics of PrNd-free (Ce, RE)-Fe-B (RE = Y, La) sintered magnets were investigated, and the effects of Y and La substitution on the microstructures and magnetic properties of Ce-based magnets were discussed. It was found that Y substitution improved the uniformity of lamellar crystalline in Ce-Fe-B strip casting alloy, while a refined crystalline structure was obtained in the Y and La co-substituted alloy. The Ce-based alloys were mainly composed of RE2Fe14B and REFe2 phases, and some small islands in REFe2 regions were identified as intermediate products. The microstructure of Ce-Fe-B sintered magnets had large grains and lacked isolation of RE-rich phases, resulting in low intrinsic coercivity. However, Y and La co-substitution significantly refined the grains and remarkably increased the magnetic properties. A Br of 8.31 kG, Hcj of 0.92 kOe, and (BH)max of 5.30 MGOe were achieved in the PrNd-free (Ce, Y, La)-Fe-B sintered magnet.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
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
Physics, Applied
Bang Zhou, Wei Li, Lin Wen, Chengyuan Xu, Xuefeng Liao, Jinbo Wei, Yu Pan, Xiaolian Liu, Song Fu, Lizhong Zhao, Hongya Yu, Xichun Zhong, Xuefeng Zhang, Zhongwu Liu
Summary: This study introduces the non-rare earth element Ge into Ce, La, and Y-based RE-Fe-B nanocrystalline alloys, successfully enhancing their magnetic properties. The (BH)(max) of 65.6 kJ/m(3) and H-cj of 346 kA/m are achieved in the [(Ce0.8La0.2)(0.5)Y-0.5](16)Fe77.5B6Ge0.5 alloy. The improvement is attributed to the increased content of the hard magnetic RE2Fe14B phase with refined grain size, which is confirmed by micromagnetic simulation. Ge addition effectively suppresses the laves phase by forming the Ce5Ge3 phase with the lowest formation energy. This work clarifies the positive role of Ge in enhancing the H-ci and (BH)(max) of nanostructured (Ce,La,Y)-Fe-B alloys.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
A. M. Gabay, Chaoya Han, Chaoying Ni, G. C. Hadjipanayis
Summary: Recently, the lack of knowledge about the high-temperature phase equilibria in the Sm-Fe-Ti system has been brought to attention due to new attempts in developing high-performance rare-earth-lean permanent magnets based on the Sm(Fe,Ti)12 compound. Experimental investigation has revealed inaccuracies in the currently accepted phase relations, leading to a revision of the Fe-rich corner of the Sm-Fe-Ti phase diagram. The study also found extended Ti ranges for the Sm(Fe,Ti)12 and Sm3(Fe,Ti)29 phases, and identified the equilibrium between the Sm2(Fe,Ti)17 and TiFe2 phases. The revised phase diagram is essential for the manufacturing of Sm (Fe,Ti)12-based permanent magnets via liquid-phase sintering.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
A. M. Gabay, Chaoya Han, Chaoying Ni, G. C. Hadjipanayis
Summary: Iron-rich corners of Sm-Fe-Ti phase diagram and quasi-ternary Sm-Fe0.8Co0.2-Ti phase diagrams are constructed based on experimental investigation. The existence of a high-temperature Th2Ni17-type phase is confirmed. The composition, equilibria, and magnetic anisotropy of cobalt-substituted phases are established.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Zuzana Bircakova, Vasily Milyutin, Peter Kollar, Maria Faberova, Radovan Bures, Jan Fuzer, Miroslav Neslusan, Serhii Vorobiov, Marianna Batkova
Summary: The paper investigates the magnetic characteristics of magnetostrictive materials Fe81Ga19 and rare-earth doped alloys at different frequencies and magnetic fields. Energy losses were separated according to Bertotti and Landgraf theories to analyze the movability of domain walls and proportions of magnetization processes in the material. The effect of rare-earth elements on the magnetic properties of FeGa alloy was studied for the first time.
Article
Materials Science, Multidisciplinary
Yosuke Harashima, Keiichi Tamai, Shotaro Doi, Munehisa Matsumoto, Hisazumi Akai, Naoki Kawashima, Masaaki Ito, Noritsugu Sakuma, Akira Kato, Tetsuya Shoji, Takashi Miyake
Summary: A data assimilation method was proposed to evaluate the finite-temperature magnetization of a permanent magnet over a high-dimensional composition space. Experimental data was integrated with first-principles calculation data to obtain the magnetization in the entire composition space at different temperatures. The results showed that Co doping did not enhance magnetization at low temperatures, but increased with increasing delta above 320 K.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Chemistry, Applied
Bang Zhou, Yitong Liu, Songmao Li, Wenbing Fan, Xuefeng Liao, Jiayi He, Hongya Yu, Zhongwu Liu
Summary: This work investigated the magnetic properties and phase precipitation behavior of Gd2Fe14B alloys in order to utilize gadolinium (Gd) in the development and manufacturing of RE-permanent magnets. The optimal direct quenched nanocrystalline Gd2Fe14B alloy exhibited excellent magnetic properties, thermal stability, and performance stability under various processes. Gd substitution in (Y1exGdx)2Fe14B alloys significantly enhanced thermal stability and decreased irreversible remanence loss, while also improving the exchange coupling effect, corrosion resistance, and oxidation resistance. This study has important implications for designing and developing low-cost RE permanent magnets with improved thermal and environment stability.
JOURNAL OF RARE EARTHS
(2023)
Article
Materials Science, Multidisciplinary
Ke Xu, Weida Huang, Xuefeng Liao, Hongya Yu, Xichun Zhong, Zhongwu Liu
Summary: In this study, a new one-step hot deformation (HD) process was proposed for fabricating NdFeB magnets using amorphous powders. The effects of deformation ratio on the microstructure, magnetic properties, and corrosion resistance were investigated. The results showed that one-step HD process can significantly improve the properties of NdFeB magnets, and the Co element segregation has important effects on the temperature and thermal stability of the magnets.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Yixuan Han, Mukun He, Jinwen Hu, Panbo Liu, Zhongwu Liu, Zhonglei Ma, Wenbo Ju, Junwei Gu
Summary: This study successfully synthesized a magnetic microwave absorbing material (MAMs) using a hydrothermal method, and its composition and morphology were controlled by adjusting the atomic ratio. The MAMs showed enhanced microwave absorption in the C band, making it a potential solution for electromagnetic pollution in this frequency range.
Article
Computer Science, Artificial Intelligence
Amirhossein Zaji, Zheng Liu, Takashi Bando, Lihua Zhao
Summary: This article introduces a novel approach to design traffic lights in a city using evolutionary-based optimization algorithms combined with an ontology-based driving behavior simulation framework. A machine-understandable knowledge of roads, intersections, traffic rules, and driving behaviors is provided through an ontology-based knowledge base, and car behavior is inspected in real time through a simulation environment. Traffic lights are optimized by defining sine-based equations for each traffic light and considering the total travel time of vehicles as the cost function in the optimization algorithm. The results show that optimized traffic lights can significantly reduce total travel time compared to uncontrolled intersections without traffic lights.
ACM TRANSACTIONS ON INTELLIGENT SYSTEMS AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Zhigao Yu, Xiangyi Liu, Jiayi He, Jiali Cao, Wenbing Fan, Yaxiang Wu, Hongya Yu, Zhongwu Liu, Zhan Wang, E. Niu
Summary: This study compares the different element diffusion and demagnetization behaviors in Tb-Cu diffused single-main-phase (SMP) and multi-main-phase (MMP) Nd-Fe-B magnets. The results show that although the infiltration of Tb is deeper in MMP magnets, the coercivity enhancement is much less compared to SMP magnets. This is attributed to the composition homogenization caused by strong inter-diffusion between the main phases in MMP magnets during the grain boundary diffusion (GBD) treatment. The non-concurrent magnetic reversal and poor loop squareness in the MMP magnets are mainly due to the large difference in H-A between the surface and the center after composition homogenization.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Xichun Zhong, Yucai Wu, Yuanxin Li, Xuan Huang, Jiaohong Huang, Cuilan Liu, Hongya Yu, Zhongwu Liu, Minglong Zhong, Zhenchen Zhong, R. V. Ramanujan
Summary: A series of LaFe11.8Si1.2/La65Co35 bulk composites were fabricated by spark plasma sintering (SPS) followed by diffusion annealing. The sintering temperature was found to have an effect on the mechanical and magnetocaloric properties of the composites. The annealed samples exhibited a 1:13 phase content of approximately 90 wt% and showed improved properties when the sintering temperature was adjusted.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Electrical & Electronic
Jiaming Li, Hongya Yu, Pan Luo, Han Yuan, Zhongwu Liu, Yu Wang, Lu Yang, Wenjie Wu
Summary: Amorphous soft magnetic powder cores (AMPCs) were prepared through inorganic-organic multiple-layer coating. The influence of phosphating treatment on the performance of AMPCs was investigated. The results showed that phosphoric acid-ethanol coating at relatively high temperature resulted in uniform and dense phosphate coating, leading to significantly reduced eddy current loss of the AMPCs. Optimized magnetic properties, including good frequency stability and low core loss, were achieved by coating the AMPCs with a 0.6 wt.% phosphoric acid-ethanol solution at 55 degrees C.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiayi He, Wenyue Song, Xiangyi Liu, Wenbing Fan, Bang Zhou, Zhigao Yu, Jiali Cao, Hongya Yu, Xichun Zhong, Zhongwu Liu, Huayun Mao
Summary: Grain boundary diffusion (GBD) is an effective method to enhance the coercivity of Nd-Fe-B magnets with lower consumption of heavy rare earths (HREs). This study proposes a macroscopically heterogeneous GBD (MHGBD) process to further reduce the use of HRE resources. The MHGBD process strengthens the edge area using HRE-based diffusion source and the center area using light rare-earth-based diffusion source. The results show that the MHGBD process significantly increases the coercivity from 1182 to 1911 kA/m.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Xuefeng Liao, Weiwei Zeng, Lizhong Zhao, Qing Zhou, Jiayi He, Wei Li, Xiangyi Liu, Hongya Yu, Xiaolian Liu, Haoyang Jia, Jean-Marc Greneche, Xuefeng Zhang, Zhongwu Liu
Summary: This article introduces a new method to improve the magnetic properties of rare earth-iron-boron magnets. By using a two-step grain boundary diffusion process, a magnet with excellent magnetic properties was obtained. The formation of RE-rich grain boundary layer through doping and diffusion was found to contribute to the enhancement of coercivity, supported by differential scanning calorimetry and transmission electron microscopy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xiangyi Liu, Jiayi He, Bin Yuan, Zhongwu Liu
Summary: Grain boundary diffusion (GBD) is an effective method to fabricate high-coercive Nd-Fe-B magnets with less consumption of heavy rare earth (HRE). However, the recently observed anti-core-shell structure in HRE diffused magnets after over-saturated diffusion reduces the beneficial effect of HRE GBD on the coercivity by accelerating the magnetization reversal of the whole magnet. Therefore, it is important to avoid the formation of anti-core-shell structure during diffusion and select appropriate diffusion time and diffusion source dosage for GBD process to obtain high-performance products and efficiently use the HRE resources.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Xichun Zhong, Yucai Wu, Yuanxin Li, Xuan Huang, Cuilan Liu, Jiaohong Huang, Zhongwu Liu, Dongling Jiao, Wanqi Qiu, Minglong Zhong, Zhenchen Zhong, R. V. Ramanujan
Summary: A novel transient liquid phase bonding (TLPB) technique was used to prepare binder-free La-Fe-Si based bulk materials by spark plasma sintering (SPS). Compared to hot-pressing sintering (HPS) samples, the SPS samples exhibited significantly higher maximum compressive strength (sigma(bc))(max) of about 637.9 MPa at a strain of 4.7%, good thermal conductivity of about 7.6 W·m(-1)·K(-1) at 300 K, and a large (-Delta S-M)(max) value of about 11.7 J·kg(-1)·K(-1) at Tc=193 K under a magnetic field change of 0 - 5 T. Thus, binder-free La-Fe-Si based bulk magnetocaloric materials with excellent properties were successfully prepared by TLPB assisted SPS technology.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Zhongwu Liu
Article
Materials Science, Multidisciplinary
Haonan Zhang, Xichun Zhong, Jinwen Hu, Na He, Hanxing Xu, Xuefeng Liao, Qing Zhou, Zhongwu Liu, Raju V. Ramanujan
Summary: Flake-shaped FeSiCr (FFSC) material is a promising microwave absorbent due to its excellent magnetic properties and environmental resistance. By introducing carbon-based materials through suitable coatings, the performance of FFSC can be improved. In this study, graphite- and epoxy resin-encapsulated FFSC (FFSC@G/E) powders were prepared using a solution-blending method, exhibiting excellent performance.
Article
Physics, Applied
Bang Zhou, Wei Li, Lin Wen, Chengyuan Xu, Xuefeng Liao, Jinbo Wei, Yu Pan, Xiaolian Liu, Song Fu, Lizhong Zhao, Hongya Yu, Xichun Zhong, Xuefeng Zhang, Zhongwu Liu
Summary: This study introduces the non-rare earth element Ge into Ce, La, and Y-based RE-Fe-B nanocrystalline alloys, successfully enhancing their magnetic properties. The (BH)(max) of 65.6 kJ/m(3) and H-cj of 346 kA/m are achieved in the [(Ce0.8La0.2)(0.5)Y-0.5](16)Fe77.5B6Ge0.5 alloy. The improvement is attributed to the increased content of the hard magnetic RE2Fe14B phase with refined grain size, which is confirmed by micromagnetic simulation. Ge addition effectively suppresses the laves phase by forming the Ce5Ge3 phase with the lowest formation energy. This work clarifies the positive role of Ge in enhancing the H-ci and (BH)(max) of nanostructured (Ce,La,Y)-Fe-B alloys.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Weijie Zhong, Hanlin Peng, Dongling Jiao, Wanqi Qiu, Zhongwu Liu, Wenyong Xu, Zhou Li, Guoqing Zhang
Summary: This study investigates and compares the cooling rate, surface morphology, and microstructure of nickel-based super-alloy powders produced by atomization with argon and nitrogen. The results reveal that the FCC structured γ-phase and γ'-strengthening phase are the main phases in atomized powders of both gases, with no apparent nitride or oxide detected on the powder surface. The powders atomized by argon exhibit higher sphericity and smoother surfaces compared to those atomized by nitrogen, while nitrogen-atomized powders have more split particles. The cooling rate significantly affects the surface characteristics of the powder, with nitrogen-atomized powders showing higher cooling rates and lower secondary dendrite arm spacing compared to argon-atomized powders.
POWDER METALLURGY AND METAL CERAMICS
(2023)
Article
Materials Science, Multidisciplinary
Tongyu Han, Haifeng Shi, Yigang Chen
Summary: In this study, a novel S-scheme system was built by combining CuO with BiVO4 to activate PMS for antibiotic degradation. The system exhibited excellent visible light absorption performance and remarkable charge separation ability, suggesting its potential application in enhancing PMS activation and purifying antibiotics in water.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Linlin Zhou, Tao Yang, Chunyu Guo, Kang Wang, Enhui Wang, Laipan Zhu, Hailong Wang, Sheng Cao, Kuo-Chih Chou, Xinmei Hou
Summary: Piezoelectric silicon carbide (SiC) has been considered for various applications due to its superior properties. However, its brittleness and unsatisfactory piezoelectric response have limited its use. In this study, PVDF/6H-SiC composite fiber films were fabricated and used for assembling high-performance energy harvesters and sensors. The results showed significant improvements in piezoelectric response and sensitivity compared to pure PVDF films. First-principles calculation and finite element analysis confirmed the effect of SiC nanoparticles on the composite film.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Y. F. An, X. P. Chen, L. Mei, P. Ren, D. Wei, W. Q. Cao
Summary: This study systematically investigates the precipitation sequence of Fe-28Mn-11Al-1C-5Ni austenitic low-density steel and its influence on mechanical properties. The results reveal the transformation pathway of kappa' -carbides and B2 particles under different aging conditions. This research is meaningful for guiding the design of new generation dual-nano precipitation austenitic lightweight steel.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Lei Yang, Tingkai Zhao, Abdul Jalil, Huijun Luo, Tao Jiang, Yuan Shu, Yazhou Yin, Weiyu Jia
Summary: In this study, a strategy utilizing oxygen vacancy concentration modulation was used to successfully grow semiconducting single-walled carbon nanotubes (s-SWCNTs) with narrow diameters. The Fe0.01Mg0.99O/CeO2(3) catalyst was employed to provide oxygen vacancies, allowing for selective etching of chemically active carbon nanotube caps during the growth process. The optimized conditions resulted in high purity s-SWCNTs with uniform diameters.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Letter
Materials Science, Multidisciplinary
Lingjun Xu, Pruch Kijkla, Sith Kumseranee, Suchada Punpruk, Tingyue Gu
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
X. P. Hu, Y. H. Zhang, C. B. Liu, H. Z. Cui
Summary: In this study, a novel polyaniline (PANI) nanosheet with barrier and passivation functions was synthesized, and its interaction with polymeric resin was enhanced by polydopamine (PDA) wrapping. The composite coating with incorporated PANI@PDA nanosheets showed improved corrosion resistance by providing a longer penetration path and inducing the formation of a passivation film on the metal substrate.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Yan Zhang, Xuehua Liu, Zhiqiang Guo, Chenyu Jia, Feng Lu, Zirui Jia, Guanglei Wu
Summary: In this study, a self-assembling-etching-anchoring growth method was proposed to prepare MXene@Co electromagnetic wave absorbing materials. The hollow structure design and surface anchored growth of magnetic Co particles significantly enhanced the wave absorption performance of the absorber.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Yajing Ren, Yunfeng Li, Guixu Pan, Ning Wang, Yan Xing, Zhenyi Zhang
Summary: Photocatalytic technology utilizing sunlight as a driving force can convert solar energy into other energy sources for storage and use. CdS, as a typical reducing semiconductor, has attracted attention in photocatalysis due to its suitable bandgap and strong reducing ability. However, the photocatalytic performance of CdS is limited by carrier recombination and photocorrosion. Therefore, CdS has been widely developed as a reducing photocatalyst in constructing S-scheme heterojunctions to overcome these limitations.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Diao-Feng Li, Chun-Guang Bai, Zhi-Qiang Zhang, Hui-Bo Zhang, Nan Li, Jian Zhao
Summary: A novel compliant spinal fixation based on compliant mechanisms is designed to effectively reduce stress-shielding effect and adjacent segment degeneration (ASD), but it requires high properties of the used materials. Bulk metallic glasses (BMGs), as young biomaterials, demonstrate excellent comprehensive properties, making them attractive for compliant spinal fixation. In this study, the large deflection deformation behaviors of Zr61Ti2Cu25Al12 (at.%, ZT1) BMG beam were systematically investigated, including elastic, yielding, and plastic deformations. The theoretical nonlinear analytical solution curve predicts the load-deflection relation within the elastic deformation regime and assists in capturing the yielding event, serving as a powerful design tool for engineers. To accurately capture the beginning of the yielding event in biomedical implant applications, the concept of bending proof strength (sigma p,0.05%) with tiny permanent strain of 0.05% was proposed and determined, which is significant for setting the allowable operating limits of the basic flexible elements. The plastic deformation driven by the bending moment can be classified into two stages: the initial stage characterized by nucleation and intense interaction of shear bands, and the second stage dominated by the progressive propagation of shear bands and emergence of shear offsets. The plasticity of BMG beam structures depends on the BMG's inherent plastic zone size (rp), and when the half beam thickness is less than that of rp, the plastic deformation of BMGs behaves in a stable manner, effectively serving as the margin of safety.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Yanlin Li, Zhu Ma, Shanyue Hou, Qianyu Liu, Guangyuan Yan, Xiaoshan Li, Tangjie Yu, Zhuowei Du, Junbo Yang, Yi Chen, Wei You, Qiang Yang, Yan Xiang, Shufang Tang, Xuelin Yue, Meng Zhang, Wenfeng Zhang, Jian Yu, Yuelong Huang, Jiale Xie, Chun Tang, Yaohua Mai, Kuan Sun
Summary: This paper provides an overview of hydrogen progress from solar energy to solar cells, with a focus on photovoltaic-electrolysis and photoelectrochemical/photovoltaic systems. Both systems have achieved a solar-to-hydrogen efficiency of over 10% and show great potential for large-scale application. The challenges and opportunities in this field, including configuration design, electrode materials, and performance evaluation, are summarized. The paper also analyzes and presents perspectives on the potential commercial application and further scientific research for the development of solar-to-hydrogen.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
L. K. Huang, F. Liu, M. X. Huang
Summary: The bainite transformation in medium Mn steels has been experimentally and theoretically studied, and it has been found that the transformation kinetics is slow. However, the introduction of dislocations can significantly accelerate the transformation rate. A new "carbon depletion mechanism" is proposed to explain the role of dislocations in the acceleration of bainite transformation, and a physical model is developed to quantitatively understand the kinetics of bainite transformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Jing Qiao, Lutong Li, Jiurong Liu, Na Wu, Wei Liu, Fan Wu, Zhihui Zeng
Summary: Rare earth plays a crucial role in electromagnetic wave absorption materials, and the strategies of doping rare earth elements and constructing rare earth oxide composites are important for the fabrication of high-efficiency electromagnetic wave absorption materials. This review provides a comprehensive summary of the research background, classification, features, progress, and future development of rare earth electromagnetic wave absorption materials, offering guidance for future development.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Yao Gu, Zhongzheng Yao, Sinan Liu, Huiqiang Ying, Chenyu Lu, Zhenduo Wu, Yang Ren, Jun-ichi Suzuki, Zhenhua Xie, Yubin Ke, Jianrong Zeng, He Zhu, Song Tang, Xun-Li Wang, Si Lan
Summary: Fe-based metallic glasses are promising materials in the fields of advanced magnetism and sensors. This study proposes a novel approach to tailor the amorphous structure through liquid-liquid phase transition, and provides insights into the correlation between structural disorder and magnetic order. The results show that the liquid-liquid phase transition can induce more locally ordered nanodomains, leading to stronger exchange interactions and increased saturation magnetization. The increased local heterogeneity also enhances magnetic anisotropy, resulting in a better stress-impedance effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Hao Yu, Xin Kou, Xueqing Zuo, Ding Xi, Haijun Guan, Pengfei Yin, Lijia Xu, Yongpeng Zhao
Summary: Metal-organic frameworks derived composites are promising EMW absorbers. Cation substitution can improve their absorption performance by regulating morphology and atomic space occupation. However, the mechanisms of how cation substitution affects EMW absorption performance are still not well understood. In this study, imidazolic MOFs were fabricated and tailored by cation substitution strategy to prepare porous composites. The samples showed optimal reflection loss and effective absorption bandwidth values under low filling rate and thin thickness conditions. The intercoupling between multiple atoms and the porous structure introduced by cation substitution contribute to the improved absorption performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Lina Wang, Peiyi Yan, Huairui Chen, Zhuo Li, Shu Jin, Xiaoxiang Xu, Jun Qian
Summary: The narrow bandgap semiconductor MgIn2S4 has been grown onto In2O3 nanofibers using an in situ growing method. The resulting MgIn2S4-In2O3 hybrid nanofibers exhibit strong visible light absorption and intimate MgIn2S4/In2O3 heterointerfaces, leading to highly efficient photocatalytic disinfection of Escherichia coli.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)