Article
Materials Science, Multidisciplinary
Yichang Wang, Lingfei Cao, Xiaodong Wu, Xiaomin Lin, Tianyu Yao, Liming Peng
Summary: In this study, the effects of minor Ti, Mn, Cr, Zr, and Er additions on cast Al-Zn-Mg-Cu alloys were investigated. The addition of Ti significantly refines the ingot grains, while Mn and Cr additions reduce impurities and form specific phases. The joint addition of Ti, Mn, Cr, Zr, and Er creates a bulk composite phase. The alloy with the joint addition of these elements exhibits the highest hardness due to collaborative strengthening effects.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Xiangzhen Zhu, Xixi Dong, Paul Blake, Shouxun Ji
Summary: The experimental results showed that the combination of different amounts of theta-Al2Cu and Q-Al5Cu2Mg8Si6 phases can provide the same yield strength but different elongations. By optimizing the synergistic strengthening of these two phases, a balanced strength-ductility trade-off was achieved in the newly developed alloy at 3.0 wt% Cu and 0.9 wt% Mg. Thermo-dynamic calculation using Pandat 2018 software explained the formation and distribution of strengthening phases, indicating that nanoscale Q-Al5Cu2Mg8Si6 particles are precipitated via solid-solid reaction.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
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
Chemistry, Physical
Xixi Dong, Hamza Youssef, Xiangzhen Zhu, Yijie Zhang, Shihao Wang, Shouxun Ji
Summary: The addition of titanium diboride nanoparticles can enhance the strength and maintain ductility of die-cast AlSi9Cu2Mg alloy. Fe-rich compounds and Q-phase were prone to cracking after the addition of titanium diboride nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Guangming He, Yunxuan Zhou, Zuohong Gu, Quan Dong, Yi Lin, Jun Tan, Xianhua Chen, Bin Jiang, Fusheng Pan
Summary: A series of low-cost and high strength cast Mg-7Zn-xAl-0.3Mn alloys were successfully designed and prepared. The microstructures and mechanical properties of these alloys were improved after heat treatment, and the ZAM750 alloy showed the most outstanding comprehensive mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hyongjoon Lee, Hobyung Chae, You Sub Kim, Min Ji Song, Sangyeob Lim, Kali Prasad, Hariharan Krishnaswamy, Jayant Jain, Ke An, Soo Yeol Lee
Summary: The study found that AA7075 alloy in different heat treatment states exhibits different behaviors during stress relaxation, with alloys in peak-aged condition showing the highest stress drop and plastic strain change. As stress relaxation cycles repeated, the decrease in activity of mobile dislocations led to a decrease in stress drop, and the relationship between grain orientation hardness and lattice strain affected the stress relaxation effect.
MECHANICS OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
He Qin, Guangyu Yang, Lei Zhang, Shuxia Ouyang, Chunhui Wang, Wanqi Jie
Summary: The research investigated the tensile creep behavior and microstructure evolution of an as-cast Mg-9.82Gd-0.38Zr alloy under different stresses at 250 degrees C. The results showed a correlation between creep stress, creep strain, and steady creep rate at 250 degrees C. The formation of beta' phase near alpha-Mg grain boundary due to Gd content segregation at the primary stage gradually deteriorated the creep resistance of the experimental alloy.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Shuwei Duan, Zhongli Liu, Fuqiang Guo, Yuzhe Pan, Kenji Matsuda, Yong Zou
Summary: The aging precipitation behavior and its effects on the mechanical properties of a novel cast Al-Cu-Li alloy were investigated. It was found that during artificial aging, various phases precipitate sequentially, with the T1 phase and cubic phase showing excellent thermal stability. After aging, the alloy's tensile strength increases to 423 MPa, but the elongation decreases significantly.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Sang Hun Shim, Hesam Pouraliakbar, Sun Ig Hong
Summary: Hierarchical structure with microscale granular phase separation and nanoscale intragranular precipitation developed in CrFeNiMn0.5Cu0.5 high entropy alloy due to the reduction of entropy contribution during solidification. The conventional induction casting method produced hierarchical-structured high entropy alloy with extraordinary mechanical properties, surpassing most thermo-mechanically processed high entropy alloys.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Zhongyang Li, Qudong Wang, Huaping Tang, Tianwen Liu, Chuan Lei, Haiyan Jiang, Wenjiang Ding
Summary: The study showed that the microstructure and mechanical properties of squeeze-cast Al-5Mg-3Zn-1Cu-1Si alloy vary along the depth direction under both squeeze-cast and peak-aged conditions. After peak aging, the strength of the alloy increased while the ductility improved.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Shu-Wei Duan, Kenji Matsuda, Tao Wang, Yong Zou
Summary: By investigating the microstructures and mechanical properties of a novel cast Al-Cu-Li alloy during heat treatment, it was found that a relatively good combination of strength and ductility was achieved after natural aging. The complex precipitate distribution, decrease in density but increase in size of certain phases, and the presence of precipitate-free zones near grain boundaries were identified as key factors for the improvement in performance.
Article
Materials Science, Multidisciplinary
Bo Hu, Zixin Li, Dejiang Li, Tao Ying, Xiaoqin Zeng, Wenjiang Ding
Summary: A criterion based on solidification microstructure was proposed to predict the hot tearing behavior of cast alloys, considering various factors. The credibility of this criterion was validated through the study of hot tearing behavior of Mg-Ce alloys, and a simplified criterion and hot tearing index for specific cases were derived and validated.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Christian Gawert, Ruediger Baehr
Summary: A new procedure for automatic measurement of SDAS from microscopic images is introduced and successfully applied to two hypoeutectic aluminum cast alloys, showing good agreement between automated and manually measured values. A decrease in computation time allowed for an increase in measurement density for characterizing microstructures.
Article
Materials Science, Multidisciplinary
Hao Ji, Guohua Wu, Wencai Liu, Xiaolong Zhang, Liang Zhang, Mingxu Wang
Summary: The origin of the age-hardening and age-softening response in Mg-10Li(-Zn)(-Er) alloys is studied. The age-hardening is attributed to the precipitation of the semi-coherent (Mg, Li)(3)Zn phase, while the age-softening is primarily caused by the gradual substitution of Mg atoms by Li/Zn atoms in the precipitate. The addition of Er retards the evolution of the (Mg, Li)(3)Zn precipitate, leading to a deceleration of age-softening in the alloy.
Article
Materials Science, Multidisciplinary
T. K. Akopyan, P. K. Shurkin, N. V. Letyagin, F. O. Milovich, A. S. Fortuna, A. N. Koshmin
Summary: The experimental studies showed that adding trace amounts of tin refines the Al2Cu phase in an Al-Cu based alloy, resulting in a significant increase in peak hardness by about 20% and a reduction in aging time to peak hardness from 12 hours to 2 hours at 175 degrees Celsius. This increase in hardness is attributed to the formation of finer theta-phase precipitates with high number density, as observed in TEM and APT analyses.
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.