Article
Materials Science, Multidisciplinary
Jinjun Xu, Zhongqi Hao, Zhenghong Fu, Xingdao He, Hui Wang, Guili Xu
Summary: Slow strain rate tensile tests under in situ hydrogen electrochemical charge were conducted to investigate the hydrogen embrittlement behavior of selective laser-melted (SLM) and post-heat-treated Inconel 718 alloys, along with microstructure evolution and cracking feature characterization. The study found that the high density of dislocations and local strain along the cellular structure walls in the as-SLM sample increased local hydrogen concentration, resulting in cracks along the cell walls. The precipitation of g0, g00, and 8 phases generated by solution aging significantly enhanced the tensile strength and HE susceptibility, with the 8 phase formation along the grain boundaries and cell walls leading to 8/g interface cracking in solution-aged samples.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
B. S. Rowlands, C. Rae, E. Galindo-Nava
Summary: Dynamic Strain Ageing (DSA) has been widely accepted as the mechanism behind the Portevin-Le Chatelier effect in ferritic steels since its proposal in the 1940's. However, its applicability to Face-Centred Cubic (FCC) alloys, including nickel-based superalloys, is still uncertain. This review compares plastic instabilities in superalloys to those in ferritic steels and discusses outstanding issues and proposed explanations for the phenomena.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Zhiheng Hu, Yang Qi, Xiaojia Nie, Hu Zhang, Haihong Zhu
Summary: An Al-Cu alloy fabricated by selective laser melting was chosen to study the Portevin-Le Chatelier (PLC) effects. The study revealed that heat treatment decreases dislocation density and the decrease in solute atom concentration and dislocation density are responsible for the attenuation of PLC effects. The strong anisotropy in PLC effects observed in the as-built samples is attributed to grain structure and texture.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Yumi Choi, Jinjin Ha, Myoung-Gyu Lee, Yannis P. Korkolis
Summary: The study investigates the kinetics of PLC bands during the hole-expansion process on a solid-solution heat-treated AA7075 aluminum sheet. Each PLC band aligns radially, spans diverse stress states, and propagates circumferentially, with nucleation frequency influenced by plastic anisotropy and proportionally to thickness strain.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Shiyuan Luo, Yongxin Jiang, Sandrine Thuillier, Philippe Castany, Liangcai Zeng
Summary: A simplified 3D FE model based on McCormick's model has been developed to numerically predict the spatiotemporal behaviors of the PLC effect in Ti-12Mo alloy tensile tests. The simulated results are highly consistent with experimental ones, especially in terms of stress drop magnitudes and PLC band widths. Additionally, the study observes the staircase behavior of strain-time curves and the hopping propagation of the PLC band in Ti-12Mo alloy tensile process.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Wanjun He, Rui Hu
Summary: Portevin-Le Chatelier (PLC) effects, twinning-detwinning, and disordering phenomena were observed and investigated in long-range ordered (LRO) phase strengthened Ni-Cr-Mo alloys during hot compression. The results showed that the PLC effects with type-C serrations occurred in the solution-treated and aged alloys, with the Pt2Mo-type LRO phase increasing the serration amplitude at the early stage of deformation. However, twinning of aged alloy was only activated after the early stage of deformation, and deformation twins and the Pt2Mo-type LRO phase were not stable during severe deformation. The potential disordering process of the LRO phase was suggested to be dislocation slipping on the two valid {111}<110> slip systems, and detwinning mechanism was likely the dislocation-twin boundary interaction as indicated by steps on the twin boundaries of remanent deformation twins.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
D. Yuzbekova, A. Mogucheva, Yu Borisova, R. Kaibyshev
Summary: The nucleation and subsequent development of Portevin-Le Chatelier bands during tensile deformation in a binary AlMg alloy were investigated using digital image correlation techniques. Different material states were analyzed to reveal specific spatiotemporal patterns of the alloy, indicating that the nucleation of deformation bands follows a mixed mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Xingwei Huang, Xinzhe Zhou, Weizhen Wang, Chuanyong Cui, Hengqiang Ye, Zhiqing Yang
Summary: The presence of MTs increased the alloy's yield strength but changed the PLC effect type and increased serration amplitudes significantly. The interaction between dislocations and MTs created soft channels for dislocation glide, resulting in high serration amplitudes during deformation.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Mechanical
Jianbin Xu, Odd Sture Hopperstad, Bjorn Holmedal, Torodd Berstad, Tomas Manik, Knut Marthinsen
Summary: The Portevin-Le Chatelier (PLC) effect and its spatio-temporal characteristics are studied in the aluminium alloy AA5182. Experimental and numerical methods are used to observe the nucleation and propagation of the PLC bands under different strain rates. The strain accumulation and strain ageing processes are found to determine the subsequent band nucleation.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
Jiarui Kang, Xun Liu, Tianzhao Wang
Summary: The effect of ultrasonic vibration on the stress-strain behavior and the Portevin-Le Chatelier (PLC) effect in aluminum alloy 2024 O temper and T4 were investigated. The results show that ultrasonic vibration can decrease the flow stress and enhance the PLC bands in both heat treatments.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
S. Malopheyev, S. Mironov, R. Kaibyshev
Summary: The microstructural sensitivity of the Portevin-Le Chatelier (PLC) effect in an Al-Mg alloy with a heterogeneous microstructure distribution was investigated. It was found that the microstructural changes induced by friction-stir processing enhanced the PLC phenomenon by increasing the magnitudes of stress oscillations, localized strain, and the width of deformation bands.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Han Chen, Yanchi Chen, Yifei Tang, Gang Ji, Yves Brechet, Shengyi Zhong, Haowei Wang, Guanyun Yan, Zhe Chen
Summary: The Portevin-Le Chatelier (PLC) effect is a common phenomenon in many alloy systems that leads to variations in flow stress. The influence of precipitation on PLC behavior and flow stress has not yet been fully understood. This study investigates the influence of the PLC effect on flow stress in three cases: without precipitates, with shearable precipitates, and with non-shearable precipitates. A modified constitutive relationship is proposed to quantify the contribution of the PLC effect in these cases. The modeling results are in good agreement with experiments on AlMg and AlMgScZr alloys, showing that PLC-induced strengthening can account for up to 14.5% of the total flow stress in AlMg alloys.
Article
Materials Science, Multidisciplinary
Yaoxiang Duan, Han Chen, Zhe Chen, Lei Wang, Mingliang Wang, Jun Liu, Fengguo Zhang, Haowei Wang
Summary: The influence of different precipitate-dislocation interactions on PLC bands and surface roughness in AlMgScZr alloy was investigated. Shearable precipitates were found to decrease the number of PLC bands and surface roughness, providing guidance for designing structural materials with desirable mechanical property and surface quality.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xiaole Gong, Jihua Chen, Hongge Yan, Weijun Xia, Bin Su, Wensen Huang
Summary: The study found that adding 0.1 wt% Sr can reduce the impact of the Portevin-Le Chatelier effect on the as-solutionized Mg-4Zn alloy, due to the inhibition of twinning, better grain coordination deformation ability, and lower density of geometrically necessary dislocations.
Article
Materials Science, Multidisciplinary
Han Chen, Zhe Chen, Yuchi Cui, Lei Wang, Mingliang Wang, Jun Liu, Shengyi Zhong, Haowei Wang
Summary: Metal matrix composites (MMCs) have excellent mechanical properties and the influence of TiB2 ceramic particles on Portevin-Le Chatelier (PLC) behavior in a TiB2/AlMg composite is systematically investigated in this study. The presence of particles decreases the critical strain of PLC at high strain rate, but the difference becomes smaller with decreasing strain rate. The dual effects of particles on dislocation waiting time are discussed, showing that the effect of particles weakens with decreasing strain rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Mahdieh Safyari, Masoud Moshtaghi, Tomohiko Hojo, Eiji Akiyama
Summary: This study revealed that aluminum alloy with coherent Al3Zr dispersoids exhibits superior hydrogen embrittlement resistance. The elastic interaction between coherency strain and hydrogen leads to hydrogen accumulation at Al3Zr dispersoids, while the introduction of misfit dislocations decreases elastic strain and enhances hydrogen trapping.
Article
Metallurgy & Metallurgical Engineering
Tomoka Homma, Takahiro Chiba, Kenichi Takai, Eiji Akiyama, Wataru Oshikawa, Michihiko Nagumo
Summary: This paper presents the first microscopic observation of the entire cracking process in delayed fracture of high-strength steel bolt after long-term atmospheric exposure. The initiation of the propagating crack is observed beneath the screw groove, resulting from the merging of multiple cracks. The fracture morphology changes from intergranular to quasi-cleavage and fine dimples, associated with increasing stress intensity.
ISIJ INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Akihiko Nagasaka, Tomohiko Hojo, Yuki Shibayama, Masaya Fujita, Takumi Ohashi, Mako Miyasaka, Eiji Akiyama
Summary: The effect of retained austenite characteristics on V-bending in ultrahigh-strength TRIP-aided steel sheets with bainitic ferrite matrix (TBF steel) for automotive applications was investigated. It was found that the 0.2C-1.5Si-1.5Mn TBF steel sheets performed V-bending through strain-induced martensitic transformation of TRIP effect, while the ferrite-martensite dual-phase (MDP0) steel sheet of 900 MPa grade was not able to perform 90-degree V-bending due to crack initiation in tension area. Additionally, the TBF375 steel sheet, produced by specific heat treatment, enabled 90-degree V-bending and controlled the amount of springback.
ISIJ INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Tomohiko Hojo, Motomichi Koyama, Bakuya Kumai, Yuki Shibayama, Ayumi Shiro, Takahisa Shobu, Hiroyuki Saitoh, Saya Ajito, Eiji Akiyama
Summary: The origins of the superior work hardening capability of medium manganese (M-Mn) and conventional transformation-induced plasticity-aided bainitic ferrite (TBF) steels of similar tensile strength and elongation are investigated. The work hardening capability of M-Mn steel is attributed to high rates of martensitic transformation and dislocation accumulation in retained austenite, while the work hardening capability of TBF steel is attributed to high austenite phase stability and resistance to slip deformation.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Yutao Zhou, Tomohiko Hojo, Amane Kitahara, Yusuke Onuki, Shigeo Sato, Motomichi Koyama, Eiji Akiyama
Summary: The transformation and stabilization behaviors of the austenite phase during bainite transformation in the early stages of austempering treatment of low-alloy TBF steel were studied. It was found that the low-carbon austenite phase disappeared within 300 seconds, while the lattice constant of the high-carbon austenite phase increased significantly. The volume fraction of the high-carbon austenite phase decreased monotonically as the austempering time increased, while the lattice constant remained almost unchanged.
Article
Materials Science, Multidisciplinary
Hiroshi Kakinuma, Saya Ajito, Tomohiko Hojo, Motomichi Koyama, Sachiko Hiromoto, Eiji Akiyama
Summary: In this study, a hydrogenochromic sensor was used to visualize the real-time process of hydrogen entry into an Fe sheet during corrosion. The sensor successfully visualized the hydrogen entry, with promotion on the dissolved area and minimal observation on the corrosion product-deposited area or oxygen reduction reaction site. The decrease in solution pH and exposure of the new Fe surface were considered critical to hydrogen uptake.
Article
Chemistry, Physical
Hiroshi Kakinuma, Saya Ajito, Tomohiko Hojo, Motomichi Koyama, Sachiko Hiromoto, Eiji Akiyama
Summary: In this study, the distribution of hydrogen entering an Fe sheet under a droplet of NaCl solution was successfully visualized using a hydrogenochromic sensor. The entry of hydrogen was initially difficult to confirm, but became observable as the corrosion progressed, with the preferential entry site corresponding to the rust-formed area. The study postulates that the decrease in pH due to hydrolysis reactions of Fe ions under the rust promotes the entry of hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Yutao Zhou, Motomichi Koyama, Tomohiko Hojo, Saya Ajito, Eiji Akiyama
Summary: In this study, the temperature dependence of microstructure and damage evolution in medium Mn steel was investigated. The results showed that deformation temperatures had a significant impact on the flow behavior, work hardening rate, and mechanical properties of the steel. Deformation-induced martensite acted as the initiation site of damage, and the critical strain and probability of damage initiation decreased with decreasing deformation temperature. Furthermore, the decrease in temperature deteriorated the micro-damage arrestability of ferrite, resulting in a transition from ductile to quasi-cleavage fractures.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Rama Srinivas Varanasi, Motomichi Koyama, Hiroyuki Saitoh, Reina Utsumi, Toyoto Sato, Shin-ichi Orimo, Eiji Akiyama
Summary: The phase transformations and microstructure changes during the depressurization of non-hydrogenated and hydrogenated Fe-Mn-Si-Cr alloy were investigated. Understanding the effects of hydrogenation on the stability of the austenite phase in Fe-based alloys is crucial.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Yota Masuda, Motomichi Koyama, Hiroshi Kakinuma, Eiji Akiyama
Summary: The effects of mechanical loading on hydrogen uptake were studied using thermal desorption experiments. The diffusible hydrogen content increased with increasing elastic and plastic strains, with a larger increase per elastic strain than per plastic strain.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hao Luo, Van Hoang Nguyen, Kazuhiro Gotoh, Saya Ajito, Tomohiko Hojo, Yasuyoshi Kurokawa, Eiji Akiyama, Noritaka Usami
Summary: This study investigates the effect of post-oxidizing treatment (POT) on the structural, optical, and passivation performances of titanium oxide coated crystalline Si (c-Si) heterostructures prepared by the solution process. The results show that POT improves the passivation performance by oxidizing the TiOx film, c-Si surface, and forming POx.
Article
Materials Science, Multidisciplinary
Saya Ajito, Tomohiko Hojo, Motomichi Koyama, Sachiko Hiromoto, Eiji Akiyama
Summary: The environment-assisted cracking behavior of AZ31 magnesium alloy was studied through tensile tests in a Na2B4O7·10H2O solution containing NH4SCN and in air at cathodic and corrosion potentials. Mechanical properties of AZ31 were unaffected by the environment at an initial strain rate of 10-4s-1, but degraded in the solution at an initial strain rate of 10-6s-1. Higher potentials resulted in smaller total elongation, while positive potential shift increased the average hydrogen absorption rate. These findings indicate that environment-assisted cracking becomes more severe under relatively high potential due to corrosion and enhanced hydrogen absorption.
Article
Nanoscience & Nanotechnology
Yutao Zhou, Tomohiko Hojo, Motomichi Koyama, Saya Ajito, Eiji Akiyama
Summary: Hydrogen and deformation temperature have significant effects on micro-damage evolution and fracture behavior of TRIP-aided steel. Hydrogen uptake increases micro-damage density and changes fracture mode at different deformation temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Tingshu Chen, Motomichi Koyama, Takahiro Chiba, Eiji Akiyama, Kenichi Takai
Summary: The effects of the misorientation of prior austenite grain boundary (PAGB) segments on the local plasticity evolution in intergranular (IG) and IG-like fractures were investigated. The study found that low-angle and sigma 3 PAGB segments allow crack-tip blunting before crack growth.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Saya Ajito, Tomohiko Hojo, Motomichi Koyama, Eiji Akiyama
Summary: In this study, hydrogen permeation tests were conducted on an iron sheet in various solutions containing ammonium thiocyanate to obtain a guideline for efficient hydrogen charging. The results show that adding ammonium thiocyanate increases the hydrogen permeation current, with the effect becoming stronger in acidic solutions.
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN
(2022)
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)
