Article
Metallurgy & Metallurgical Engineering
Weixin Lou, Hongbo Xie, Xiaobo Zhao, Junyuan Bai, Hehang Zhang, Yi Wang, Xinze Li, Hucheng Pan, Yuping Ren, Gaowu Qin
Summary: In Mg alloys, precipitation on non-basal planes is limited but crucial. However, in an aged ultralight Mg-Li-Zn alloy, precipitates dominated by C15 Laves structure can form in various habit planes, resulting in three forms of strengthening-phases: precipitate-rod, precipitate-lath, and precipitate-plate. Moreover, the non-basal precipitates can transform into the basal (Mg, Li)Zn2 Laves structure with prolonged aging. These findings provide insights into the precipitation behaviors of multi-domain Laves structures and offer guidance for designing ultralight high-strength Mg-Li based alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Song Li, Zhaohui Jin, Xiaoguo Gong, Hua Huang, Shaokang Guan, Guangyin Yuan
Summary: Mg-Sc alloys with less than 25 atomic percent Sc exhibit shape memory effects, and the martensitic transformation temperature can be elevated by tuning the chemical ordering and microstructure of Mg-Sc precipitates. Increased ground-state energy difference and decreased vibra-tional free energy difference between austenite and martensite contribute mainly to the stabilized phase transformations.
Article
Chemistry, Physical
Adam Vida, Janos Labar, Zoltan Dankhazi, Zsolt Maksa, David Molnar, Lajos K. Varga, Szilvia Kalacska, Mark Windisch, Gabriella Huhn, Nguyen Q. Chinh
Summary: The study focused on phase transitions in equimolar NiCoFeCrGa high entropy alloy, revealing a sequence of phase transitions and the potential for spinodal-like decomposition in the microstructure during cooling from high to room temperature. Elemental mapping and magnetic behaviors of the decomposed structure were also investigated.
Article
Materials Science, Multidisciplinary
W. R. Ren, Z. Q. Lia, A. P. Zhang, H. W. Chen
Summary: The precipitation of two Laves phases, C14 and C15 Mg2Nd phases, was reported for the first time in a Mg-Nd-Ca alloy isothermally aged at 250 degrees Celsius. The orientation relationships of these Laves phases with the alpha-Mg matrix were discussed, along with the formation mechanisms involving atomic substitution and shuffling. The C14 Mg2Nd Laves phase can form without shear displacement, while the formation of the C15 Mg2Nd Laves phase is associated with stacking faults and partial dislocations.
Article
Nanoscience & Nanotechnology
Xiaodong Yang, Xiaojie Zhou, Shilun Yu, Jian Zhang, Xianzheng Lu, Xiaomin Chen, Liwei Lu, Weiying Huang, Yaru Liu
Summary: The tensile behavior of extruded and peak-aged Mg-5Gd-3Y-xZn-0.5Zr alloys was investigated in terms of microstructural evolution, deformation modes, and mechanical properties at temperatures ranging from -100℃ to 300℃. The study found that the Zn content affected the distribution of intragranular and interdendritic phases, which in turn influenced the mechanical properties of the alloys. Additionally, the deformation modes during tensile testing were influenced by factors such as testing temperature, grain orientation, and LPSO morphology.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Fanzhi Meng, Shuhui Lv, Qiang Yang, Xin Qiu, Zixiang Yan, Qian Duan, Jian Meng
Summary: This study investigated the components and crystal structures of intermetallic phases in a gravity die-cast Mg-6.0Zn-1.5Nd-0.5Zr alloy using transmission electron microscopy. The results revealed multiple intermetallic phases and various internal faults in the alloy. The study also revealed new orientation relationships between different intermetallic phases.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Tongzheng Xin, Song Tang, Fan Ji, Luqing Cui, Binbin He, Xin Lin, Xiaolin Tian, Hua Hou, Yuhong Zhao, Michael Ferry
Summary: The phase transformation sequence, precipitation evolution, and optimized microstructure of Mg-Li-Al alloys were investigated. The main reason for alloy softening was analyzed, and the core-shell model of the phase transformation was observed and verified.
Article
Metallurgy & Metallurgical Engineering
Xiaoyan Li, Fei Guo, Yanlong Ma, Luyao Jiang, Hongliang Lai, Haiding Liu, Dingfei Zhang, Risheng Pei
Summary: The effect of rolling temperature on the texture and mechanical properties of dual-phase Mg-Li alloys sheets was investigated. It was found that the rolling texture was highly dependent on deformation temperature. Basal slip and pyramidal < c + a > slip played key roles in the formation of the rolling texture, while prismatic < a > slip influenced the orientation spread of the texture. Additionally, increasing temperature promoted the activity of slip systems in the beta-Li phase, leading to an improvement in texture. Moreover, the cryo-rolled sample exhibited the highest strength due to a strong hardening behavior.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Jiejun He, Lushu Wu
Summary: An obvious strengthening phenomenon has been observed in the Mg-6Al-1Zn (AZ61) alloy after simultaneous loading and aging at 170 degrees C. This simultaneous loading and aging process can increase the yield stress of the alloy by promoting the formation of a larger quantity of Al12Mg17 precipitates. The loading during aging is speculated to be more beneficial for nucleation of the precipitates, leading to a higher yield stress compared to aging after pre-strain.
Article
Nanoscience & Nanotechnology
L. X. Wang, S. Xiang, Y. B. Tan, W. Shi, Y. Q. Cai, X. M. Ji
Summary: In this study, the 9R structure was successfully obtained by adjusting the stacking fault energy. The interfacial synergism derived from the FCC and 9R structures was found to lower the cohesive energy and enhance stability. Additionally, the 9R structure provides more HCP phase nucleation cores and enhances the TRIP effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhen-Ming Hua, Min Zha, Zhao-Yuan Meng, Shen-Bao Jin, Gang Sha, Tian-Shuai Wang, Cheng Wang, Hai-Long Jia, Yipeng Gao, Hui-Yuan Wang
Summary: By manipulating solute distribution while keeping a fine-grain structure, achieving appreciable strain-aging hardening response coupling with fine-grain strengthening guarantees the development of strong dilute Mg alloy.
MATERIALS RESEARCH LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Zhen-Ming Hua, Mei-Xuan Li, Cheng Wang, Xiao Shi, Zhao-Yuan Meng, Yi-Jia Li, Hai-Long Jia, Min Zha, Hui-Yuan Wang
Summary: A remarkable natural aging hardening response induced by pre-strain treatment was observed in the dilute Mg alloy sheet, providing a novel strategy for the design of high-performance low-cost Mg alloys through the introduction of crystal defects.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Hong Ning, Cheng Wang, Lu Xu, Shi Liu, Kai Zhang, Xiao-Li Zhou, Hui-Yuan Wang
Summary: This work systematically investigates the relevance between static recrystallization and pre-aging precipitates in AZ61 alloy and reveals that pre-aging precipitates can accelerate the initial recrystallization but gradually retard the recrystallization kinetics as the annealing time prolongs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Metallurgy & Metallurgical Engineering
Zhiwei Du, Yonggang Peng, Hang Teng, Zhong Cao, Kui Zhang, Minglong Ma, Xiaolei Han, Ting Li, Cong Che, Yongjun Li
Summary: Crystal structures, growth characteristics, and transformation of the precipitates in a Mg-7Gd-5Y-1Nd-2Zn-0.5Zr (wt.%) alloy aged at 200 degrees C were investigated. The study revealed the formation and development of solute clusters and various precipitates during aging, providing valuable insights into the aging behavior and performance of the alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
B. S. Liu, H. X. Li, Y. P. Ren, H. B. Xie, H. C. Pan, M. Jiang, G. W. Qin
Summary: Investigation of phase relationships in the Mg-rich corner of the Mg-Zn-Gd ternary system at 400-475 degrees C reveals changes in equilibrium states, coexistence phenomena, and peritectic eutectic transformations. The compositions of the Z, I, F, and W phases and the solubility of Gd in the alpha-Mg solid solution are significantly affected by the addition of Zn when the phases are in equilibrium.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Shin-young Kang, Soo-min Jin, Ju-young Lee, Dae-seong Woo, Tae-hun Shim, In-ho Nam, Jea-gun Park, Yuji Sutou, Yun-heub Song
Summary: This study fabricates and investigates a two-terminal artificial synapse based on GeTe/Sb2Te3 material, which exhibits excellent multilevel resistance switching by controlling the movement of Ge atoms. The optimal pulse scheme and GeTe/Sb2Te3 layer are used to achieve tunable analog weight update, and nonlinearity of conductance states is achieved for long-term potentiation and depression.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Milos Krbal, Vit Prokop, Jan Prikryl, Jhonatan Rodriguez Pereira, Igor Pis, Alexander V. Kolobov, Paul J. Fons, Yuta Saito, Shogo Hatayama, Yuji Sutou
Summary: By using a thin amorphous layer of sulfur-rich MoS2, well-ordered crystalline MoS2 films can be grown on a Si/SiOx nontemplating substrate, with the amorphous MoS4 phase exhibiting better crystallinity compared to amorphous MoS2.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Elango Chandiran, Rintaro Ueji, Yukiko Ogawa, Kenta Nagata, Hidetoshi Somekawa, Masahiko Demura
Summary: A new concept for the alloy design of advanced structural steels was proposed based on the experimental elaboration of deformation behaviour in two novel medium carbon bainitic steels. The chemical composition and heat treatment conditions were designed using sparse mixed regression modelling. The results showed that both steels exhibited high tensile strength and good elongation. Steel A showed greater post-uniform elongation, while Steel B showed larger uniform elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Yukiko Ogawa, Alok Singh, Hidetoshi Somekawa
Summary: The mechanical properties of a coarse-grained hexagonal close packed (hcp) single phase Mg-Sc alloy with two different textures, randomized or weakened, were investigated. Both textures exhibited a high elongation of over 30% and a moderately high ultimate tensile strength of about 240 MPa. Transmission electron microscopy (TEM) observations revealed the activation of both a- and c-component dislocations in the grain interiors, away from grain boundaries by over 20 μm. Thus, pyramidal slip can occur within the grain interiors of a coarse-grained Mg-Sc alloy.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Keisuke Yamagishi, Yukiko Ogawa, Daisuke Ando, Yuji Sutou
Summary: This study investigated the TRIP effect in Mg-Sc alloys with a beta single-phase structure. The results showed that the presence of a hexagonal close-packed phase led to a strain-induced martensitic transformation, resulting in superior ductility. The Mg-Sc alloys exhibited high fracture strain and ultimate tensile strength, overcoming the limitations of conventional Mg alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Elango Chandiran, Yukiko Ogawa, Rintaro Ueji, Hidetoshi Somekawa
Summary: The effect of grain size and strain rate on the room-temperature compression of pure magnesium was studied. It was found that the deformation mechanisms and grain-boundary sliding were significantly influenced by grain size and strain rate, and the Hall-Petch relationship broke down under certain conditions. Additionally, the deformation mode had a negligible impact on the dominant deformation mechanisms and the Hall-Petch breakdown.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Hidetoshi Somekawa, Yukiko Ogawa, Yoshinori Ono, Alok Singh
Summary: The effect of grain size and testing temperature on the mechanical properties and deformation behavior of extruded Mg-Al-Zn alloys was investigated. Smaller grain size and lower testing temperature led to increased strength, while the elongation-to-failure in tension was reduced at cryogenic-temperature. Grain refinement suppressed the formation of deformation twins and enhanced grain boundary plasticity. Interestingly, grain boundary compatibility promoted the activation of non-basal dislocation slips regardless of testing temperatures.
PHILOSOPHICAL MAGAZINE LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Yi Shuang, Qian Chen, Mihyeon Kim, Yinli Wang, Yuta Saito, Shogo Hatayama, Paul Fons, Daisuke Ando, Momoji Kubo, Yuji Sutou
Summary: 2D van der Waals (vdW) transition metal di-chalcogenides (TMDs) have attracted significant attention in the nonvolatile memory field due to their tunable electrical properties, scalability, and potential for phase engineering. However, their complex switching mechanism and complicated fabrication methods pose challenges for mass production. In this study, low-Tm 2D vdW TM tetra-chalcogenides were investigated, and NbTe4 was identified as a promising candidate with an ultra-low Tm of around 447°C. The simultaneous presence of a low Tm and a high crystallization temperature Tc in NbTe4 can potentially resolve issues in current phase-change memory compounds.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
K. Yamagishi, K. Onyam, Y. Ogawa, D. Ando, Y. Sutou
Summary: Enlarging the grain size in Mg-Sc alloys can significantly enhance superelasticity. This study investigated the influence of heat treatment conditions on abnormal grain growth (AGG) induced by cyclic heat treatment (CHT). Lowering the temperature in the two-phase region resulted in uniform and large grain size after AGG. Decreasing the heating rate during CHT from the two-phase region to the single-phase region was ineffective in achieving large grain size due to increased AGG-initiating grains causing collisions between abnormally growing grains. Moreover, the formation of subgrains through CHT was identified as a key factor in promoting grain growth and accelerating AGG nucleation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Elango Chandiran, Yukiko Ogawa, Rintaro Ueji, Alok Singh, Hidetoshi Somekawa
Summary: The effects of different crystallographic orientations of the grains on damping capacity (tan8) in magnesium alloys were investigated. The results showed that the grain orientation had a significant impact on the damping capacity of pure magnesium and Mg-Sc alloy. The absence of the solute atom Sc resulted in higher damping capacity in pure magnesium compared to the Mg-Sc alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Yuta Saito, Shogo Hatayama, Wen Hsin Chang, Naoya Okada, Toshifumi Irisawa, Fumihiko Uesugi, Masaki Takeguchi, Yuji Sutou, Paul Fons
Summary: This article reports on the growth of thin crystalline films of the metastable phase GeTe2. Direct observation by transmission electron microscopy revealed a Te-Ge-Te stacking with van der Waals gaps. Moreover, electrical and optical measurements demonstrated that the films exhibited semiconducting properties suitable for electronic applications. Feasibility studies involving device structures also highlighted the potential of GeTe2 as an electronic material.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Takashi Harumoto, Hiroyuki Fujiki, Ji Shi, Yoshio Nakamura, Yuji Sutou
Summary: This research demonstrates a novel current controlled negative differential resistance (NDR) device based on phase transformation, providing more possibilities for material selection. The experimental demonstration of NDR induced by phase transformation has a significant impact on the development of NDR devices. This phase transformation-based NDR device is significantly different from typical devices such as tunnel diodes and memristors, and has the potential for evaluating hydrogen storage properties.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Takashi Harumoto, Hiroyuki Fujiki, Ji Shi, Yoshio Nakamura, Yuji Sutou
Summary: This experimental demonstration introduces a novel current controlled negative differential resistance (NDR) device based on phase transformation, showing that phase transformation can induce NDR. It opens up more material options for NDR devices. Unlike typical NDR devices, the observed NDR property of this prototype device depends strongly on the current sweep speed and shows no current polarity dependence.
MATERIALS HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Yukiko Ogawa, Alok Singh, Hidetoshi Somekawa
Summary: The damping capacities of three different phases (hcp, bcc, and martensite) in a Mg-Sc alloy were investigated. Results showed that the martensite phase exhibited a higher damping capacity compared to hcp and bcc phases. The higher damping capacity of the martensite phase is attributed to the movement of lattice defects, such as twin interfaces.
MRS COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Shogo Hatayama, Yuta Saito, Kotaro Makino, Noriyuki Uchida, Yi Shuang, Shunsuke Mori, Yuji Sutou, Milos Krbal, Paul Fons
Summary: This study annealed amorphous Mo-Te films to obtain crystalline phase, while eliminating excess Te through sublimation. It also investigated the crystallization mechanism and developed a method for large-area MoTe2 film deposition.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
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.
