Article
Materials Science, Multidisciplinary
Jiuyuan Xie, Chaoqun Pei, Jing Zhou, Dawei Ding, Tao Feng, Han Li, Baoan Sun
Summary: Uniform high-quality Fe-, Ni-, and Co-based metallic glass wires (MGWs) were synthesized successfully by the Taylor-Uitovsky method. These MGWs exhibited universal and enhanced beta-relaxation and a higher-energy state, resulting in excellent mechanical properties.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Xiaoqian Lu, Shidong Feng, Lin Li, Li-Min Wang, Riping Liu
Summary: This study tackles the challenge of identifying defects in metallic glasses by using atomic vibrational entropy from a thermodynamic perspective. The study reveals the critical role of vibrational entropy in bridging dynamics, thermodynamics, and structure in metallic glasses. The local vibrational entropy obtained by coarse-graining the atomic vibrational entropy in space effectively distinguishes between liquid-like and solid-like atoms and establishes a correlation with the structure of metallic glasses, offering a route to predict plastic events.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Youran Hong, Han Wang, Xing Li, Li Zhong, Hangman Chen, Ze Zhang, Penghui Cao, Robert O. Ritchie, Jiangwei Wang
Summary: Monatomic tantalum metallic glass nanowires, tailored by electropulsing, exhibit a wide range of deformability, either as liquid-like flow or brittle fracture. The plasticity and deformation transition of monatomic metallic glasses are dominated by inherent structural heterogeneity on the atomic level. The dispersive and sparse distribution of local order is associated with necking, while the percolation of medium-range order constrains the deformability and results in brittle failure. This work provides insights into the structure-property relationships in metallic glasses and has implications for the design of nanoscale metallic glasses with tunable mechanical properties.
Article
Materials Science, Ceramics
Lei Zhao, Di Ouyang, Yilin Wang, Kangcheung Chan
Summary: A comparative study was conducted to investigate the effects of Cu coating on the deformation behavior of metallic glass and crystalline Cu-coated metallic glass. The results showed that Cu coating can improve the tensile ductility of metallic glass while suppressing shear band activation during cyclic loading.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Review
Chemistry, Physical
Giulio Biroli, Jean-Philippe Bouchaud, Francois Ladieu
Summary: The anomalous growth of the peak value of nonlinear susceptibilities is a signature of growing amorphous order in glassy systems, with spin-glasses as an example. Experimental results on supercooled liquids support the prediction of compact glassites increasing in volume with decreasing temperature or as the system ages, as explained within the random first-order transition (RFOT). The difficulty in explaining this behavior within purely kinetic theories of glass formation is clarified, despite recent claims to the contrary.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Materials Science, Multidisciplinary
Dasheng Wei, Qinan Han, Lei Cai, Xuegang Min, Zonghan Xie, Feng Fang
Summary: A study on the production of pure iron wires through a two-step process of torsion and cold drawing showed an increase in Vickers hardness, changing grain structure, and enhanced tensile strength and elongation to failure, resulting in a desirable combination of high strength and ductility.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Mechanical
Yang Zhao, Zunyue Yu, Qianyu Wang, Xuepeng Ren, Shubin Ren, Xuanhui Qu
Summary: This study prepared near-equiatomic NiTi wires with excellent cyclic tensile fatigue life and proposed the mechanism by which deformation microstructure impacts fatigue life. The fatigue life of Ni50.2Ti49.8 was discovered to be 1.8-2.1 times greater than Ni50.9Ti49.1. Ni50.2Ti49.8 utilizes twinning, stacking faults, and wave dislocations to coordinate deformation and has a stronger pinning influence on dislocation movement, leading to extended fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Polymer Science
Chunhai Li, Xiaoying Ji, Youlei Tu, Yu Zheng, Jiabin Shen, Shaoyun Guo
Summary: Thermoresponsive shape-memory polymers (TSMPs) have the ability to restore to their permanent shapes and avoiding unfavorable irreversible deformation through macromolecular chemistry or physical blending is an efficient methodology for designing or fabricating TSMPs. Programming cycle tests (PCT) is another methodology that can select and remove unfavorable irreversible deformation, thus maximizing the shape-memory performance. This study provides a simple and efficient methodology for designing and fabricating TSMPs.
Article
Physics, Multidisciplinary
Vincent E. Debets, Hartmut Loewen, Liesbeth M. C. Janssen
Summary: Chiral active matter has attracted increasing interest due to the rich asymmetries that can be achieved in active particles. However, the study of chiral active glasses, as opposed to chiral crystals, has been largely unexplored. This study demonstrates that when chiral fluids are pushed to glassy conditions, they exhibit highly nontrivial dynamics, especially compared to standard linear active fluids. The introduction of a hammering mechanism, unique to rapidly spinning particles in high-density conditions, can fluidize a chiral active solid.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Zeng-Yu Yang, Dan Wei, Alessio Zaccone, Yun-Jiang Wang
Summary: This study introduces a new concept of integrated glassy defect (IGD) based on machine learning and atomistic physics to comprehensively understand the structural features and dynamic properties of amorphous materials. This approach can efficiently predict athermal plasticity and detect vibrational anomalies as well as relaxation and diffusion dynamics in glasses.
Article
Nanoscience & Nanotechnology
Shanshan Cai, Xiaobin Luo, Jubo Peng, Zhiqi Yu, Huiling Zhou, Ning Liu, Xiaojing Wang
Summary: This study investigated the thermal properties, mechanical properties, and microstructure evolution of Sn-xBi alloys with different compositions, and analyzed the deformation and fracture modes of Sn-Bi alloys with distinct microstructures.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Engineering, Mechanical
Zhifu Zhang, Chenyang Wang, Pan Liu, Kolan Madhav Reddy, Xiaodong Wang, Mingwei Chen, Shuangxi Song
Summary: The mechanical properties and plastic deformation of a Cu(55.4)Zr(35.2)Al(7.5)Y(1.9) nanoporous metallic glass (MG) were studied. It was found that the nanoporous MG is brittle in tension and has significant homogeneous plasticity under compression. The study clarifies the fundamental failure mechanism and deformation behavior in nanoporous MGs.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Physical
Jiacheng Zhang, Pengfei Gao, Weixu Zhang
Summary: In this study, molecular dynamics simulations were used to investigate the effects of hydrogen doping on the atomic structure, mechanical properties, and relaxation behavior of H-doped Ni50Al50 metallic glasses. The properties of H-doped MGs were found to depend not only on the hydrogen content but also on the doping method. Doping H atoms into the molten state resulted in loose atomic structures, homogeneous deformation, and enhanced beta relaxation. On the other hand, doping H atoms into as-cast MGs affected the atomic structure and mechanical properties. A small number of H atoms had little impact on the elastic matrix, while a large number of H atoms caused a decrease in strength and a shift from shear band to homogeneous deformation.
Article
Engineering, Mechanical
K. Tao, V. A. Khonik, J. C. Qiao
Summary: In this study, the effects of the structural energy states of Zr50Cu40Al10 metallic glass on its performance were investigated using depth-sensing nanoindentation. The shear transformation zone volume of the relaxed metallic glass is larger than that of as-cast one, while the strain rates sensitivity displays the opposite tendency. The plastic deformation in the creep stage of nanoindentation originates from the delayed plasticity inherited from the loading process. The creep depth shows strain rates and microstructural states dependence.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Siyi Di, Haibo Ke, Qianqian Wang, Jing Zhou, Yong Zhao, Baolong Shen
Summary: The effects of cryogenic thermal cycling treatment on the tensile plasticity and structure change of metallic glass ribbons were systematically investigated. The study found that the treated samples showed pronounced beta-relaxation peaks and enhanced tensile plasticity. This suggests that cryogenic thermal cycling treatment has a significant impact on the energy states and structural heterogeneity of metallic glasses.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Tingting Li, Sizhe Diao, Pingping Liu, Yong Zhang, Qian Zhan
Summary: An equiatomic low-activated FeCrV ternary alloy with excellent strength-ductility synergy properties was prepared by mechanical alloying and spark plasma sintering. The alloy exhibited high temperature resistance and showed remarkable irradiation tolerance compared with pure Fe.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Tian-Li Wang, Chuangshi Feng, Huibin Sun, Bin Wang, M. Hamza, Ghulam Yasin, Mohamed A. Afifi, Wei-Bing Liao
Summary: The lightweight refractory high entropy alloys (RHEAs) are considered as the best alternative to Ni-based superalloys, showing higher specific yield strength (SYS) and excellent ductility. The microstructure of Al0.5Ti2Nb1Zr1W0.5 RHEA, with a BCC structure merged with B2 nano-precipitates, plays a crucial role in its improved performance.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Yasong Li, Wei-Bing Liao, Huaican Chen, Jamieson Brechtl, Wenli Song, Wen Yin, Zhanbing He, Peter K. Liaw, Yong Zhang
Summary: A high-entropy dual-phase AlTiVCoNi alloy with a low density and hierarchical structure has been developed. The alloy exhibits phase stability due to the semi-coherent interface of the L2(1) and BCC phases, and shows exceptional compressive strength at both room and high temperatures.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Civil
Muhammad Abubaker Khan, Yangwei Wang, Mohamed A. Afifi, Mohammad Tabish, Muhammad Hamza, Ghulam Yasin, Tahir Ahmad, Wei-Bing Liao
Summary: This study focuses on the newly developed (Al, Zn)(3)Zr precipitates through double aging treatment in an Al-Zn-MgCu alloy and their response to dynamic compression. The results show that the strength of the alloy is increased with an increasing strain rate, and the microstructures change after the dynamic compression.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Wei-Bing Liao, Chen-Hao Xu, Tian-Li Wang, Chuang-Shi Feng, Muhammad Abubaker Khan, Ghulam Yasin
Summary: Nano-structured refractory high-entropy alloy films were prepared and their oxidation behavior and effects on microstructure and mechanical properties were investigated. The films exhibited stable structure and mechanical properties under oxidation conditions up to 400 degrees Celsius.
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Chenhao Xu, Muhammad Hamza, Mohamed A. Afifi, Naeem Akhtar Qaisrani, Huibin Sun, Bin Wang, Waheed Qamar Khan, Ghulam Yasin, Wei -Bing Liao
Summary: An investigation was conducted to study the influence of peak-ageing and double ageing treatments on the precipitation along different grain boundary orientations of an extruded Al-Zn-Mg-Cu alloy. The results showed that the type of grain boundary precipitates varied depending on the grain boundary orientation and treatment. The study provides new insights into engineering the grain boundary precipitates to achieve desired precipitate types and corresponding mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Lin Deng, Jin-ru Luo, Jian Tu, Rong Hu, Ning Guo, Wen-yu Zeng, Chang-hao Wang, Pei He, Yong Zhang
Summary: As a candidate material for fuel cladding in fission reactors, the mechanical properties of ODS-F/M steel were improved by incorporating ultra-high number density of Y2O3 oxide nanoparticles through the addition of Y2O3 during HIP and optimizing microstructure and properties through hot rolling deformation. The addition of Y2O3 resulted in a bimodal ferrite structure and reticular M23C6 carbides distribution. Following hot rolling, grain size and M23C6 carbides were refined significantly while Y2O3 particle size remained unchanged. This resulted in an excellent combination of strength (1474 MPa) and ductility (13%) in ODS steel prepared by HIP with Y2O3 addition and hot rolling.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Shichao Zhou, Chunduo Dai, Huaxing Hou, Yiping Lu, Peter K. Liaw, Yong Zhang
Summary: A bionic bamboo fiber heterogeneous microstructure was created in an ultrafine-grained eutectic high-entropy alloy, AlCoCrFeNi2.1, through multi-pass cold-drawing and subsequent annealing. The bionic microstructure consists of a hard-B2 fiber embedded in a soft-face-centered-cubic (FCC) matrix, resulting in excellent strength and ductility synergy.
SCRIPTA MATERIALIA
(2023)
Review
Materials Science, Multidisciplinary
Kaixuan Cui, Yong Zhang
Summary: This paper discusses the preparation process, microstructure, hardness, wear resistance, and corrosion resistance of high-entropy alloy films, and analyzes the influence of factors such as nitridation, sputtering power, substrate temperature, and substrate bias on the phase structure of alloy films. High-entropy alloy films can be prepared using various processes. They tend to form a solid solution and amorphous state, and their hardness is much higher than that of traditional films. Some high-entropy alloy films have better corrosion resistance than stainless steel due to the corrosion-resistant elements and amorphous structure. High-entropy alloy films have promising development prospects in wear-resistant coatings, corrosion protection, diffusion barriers, and photothermal conversion coatings.
Article
Materials Science, Multidisciplinary
Kuan Gao, Yuexin Chu, Weihua Zhou, Yong Tian, Yong Zhang, Yi Li
Summary: This study systematically investigates the phase inversion phenomenon in a high-Al-content B2 refractory high-entropy alloy (RHEA) through thermo-mechanical treatment. The grains of the single B2 phase transform inversely to the BCC+B2 microstructure with a dispersion of spherical B2 precipitates in the BCC grains. The phase inversion process enhances the tensile ductility of the RHEA while maintaining its high specific strength.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Muhammad Abubaker Khan, Muhammad Hamza, Jamieson Brechtl, Zahid Nazir, Naeem Akhtar Qaisrani, Ghulam Yasin, Tahir Ahmad, Wei-Bing Liao, Peter K. Liaw, Mohamed A. Afifi
Summary: A novel refractory high entropy alloy (RHEA) with a low-density and good specific strength and plasticity has been designed and studied. The alloy demonstrates excellent compressive plasticity and specific yield strength, showing potential for applications in high-temperature environments.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yangyong Zhao, Yuanyuan Bai, Tie Li, Yong Zhang, Eiichi Sato
Summary: Cu-Sn shape-memory microwires were fabricated by a glass-coated melt spinning method. The effects of Sn content on the microstructure and mechanical properties of microwires were investigated. It was found that a high cooling rate in the method greatly improved the mechanical properties and superelasticity of the microwires.
Article
Materials Science, Multidisciplinary
Ruixuan Li, Guihong Geng, Yong Zhang
Summary: High-entropy alloys (HEAs) have gained significant attention for their unique composition design and excellent properties, and the concept of entropy regulation has been widely used to develop performance-oriented alloys. Lightweight high-entropy alloys (LHEAs) are important lightweight materials that exhibit special properties due to high alloying elements and high mixing entropy, including high specific strength, high specific hardness, and excellent corrosion resistance. However, there are still unresolved questions regarding phase formation rules and comprehensive performance in specific service environments. This paper reviews the composition design, phase formation rules, mechanical properties, physical properties, and chemical properties of typical LHEAs, highlighting the challenges and future development directions.
MRS COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Dan Liu, Xi Jin, Huijun Yang, Junwei Qiao, Yong Zhang
Summary: The temperature sensitivity of cobalt-free high-entropy alloys Fe45Mn15Cr15Ni25 and Fe35Mn15Cr15Ni25Al10 was investigated. The addition of aluminum improves the mechanical properties and thermal stability of the alloys, but exacerbates the serration behavior.
Article
Materials Science, Multidisciplinary
Ruixuan Li, Baixue Bian, Gerhard Wilde, Yong Zhang, Sergiy V. Divinski
Summary: The tracer self-diffusion of Co in a compositionally complex AlCoCrFeNiTi0.2 alloy was measured using the radiotracer technique. The analysis of the complex multi-phase microstructure allowed for the determination of volume diffusion coefficients and grain boundary diffusion coefficients.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
