Article
Materials Science, Multidisciplinary
Joshua A. Smeltzer, B. Chad Hornbuckle, Anit K. Giri, Kristopher A. Darling, Martin P. Harmer, Helen M. Chan, Christopher J. Marvel
Summary: This study explores intentionally doping high entropy alloys with non-metallic species to precipitate ordered phases and enhance hardness. The successful doping of nitrogen resulted in multiple nitrogen-rich secondary phases, including a unique ordered laminar phase and a complex carbonitride. Long term aging treatments and comparison with undoped alloys confirmed that intentional formation of complex nitride phases greatly increased the hardness by up to 3-4 GPa.
Article
Chemistry, Physical
K. R. Ramkumar, N. Radhika, S. Sivasankaran, Hyoung Seop Kim
Summary: This study focused on the production of [Cu-10 Ni](x)-x wt% Si3N4 nanocomposites through mechanical alloying followed by spark plasma sintering. The results indicated that the incorporation of Si3N4 nanoparticles decreased the matrix powder particle size considerably and improved the compression strength of the sintered samples through stronger bonding and grain refinement.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
C. Suryanarayana, Ahmed A. Al-Joubori, Furkan Turker, Umamaheswara Rao Seelam
Summary: Nanocrystalline alpha-ZnSe was successfully synthesized by mechanical alloying, forming a homogeneous phase after 1 hour of milling without further changes observed up to 10 hours. The minimum crystallite size achieved was 9 nm. Annealing the powder at 1000 degrees C for 1 hour resulted in an increase in lattice parameter, indicating a contraction in the nanocrystalline state and reaching equilibrium upon annealing. SEM and EDS techniques confirmed the XRD results. These findings demonstrate the synthesis of a homogeneous alpha-ZnSe phase during milling and an increased homogeneity range of the phase.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
C. Suryanarayana, Ahmed A. Al-Joubori, Furkan Turker, Umamaheswara Rao Seelam
Summary: Nanocrystalline and α-ZnSe were synthesized by mechanical alloying. XRD studies showed a homogeneous phase formed after 1 hour with no further changes. The minimum crystallite size achieved was 9 nm. Annealing increased the lattice parameter, suggesting contraction in the as-milled condition and reaching equilibrium on annealing. SEM and EDS techniques confirmed the XRD results. These new findings demonstrate the formation of a homogeneous α-ZnSe phase during milling and an increased range of homogeneity.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Joshua A. Smeltzer, Mari-Therese Burton, B. Chad Hornbuckle, Anit K. Giri, Kristopher A. Darling, Martin P. Harmer, Christopher J. Marvel
Summary: Cryogenic mechanical alloying is a feasible method to synthesize nanostructured alloys with improved mechanical properties. By systematically varying milling parameters, it was found that using liquid nitrogen for milling can induce the precipitation of ultra-hard nitride phases, leading to hardness improvement beyond 17 GPa.
MATERIALS & DESIGN
(2021)
Article
Nanoscience & Nanotechnology
Justyna Zygmuntowicz, Joanna Los, Bernard Kurowski, Paulina Piotrkiewicz, Waldemar Kaszuwara
Summary: The study focused on the fabrication and characterization of Al2O3-Cu and Al2O3-Cu-Mo ceramic-metal composites, with molybdenum addition improving the wear resistance properties of the composites.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Chemistry, Physical
Y. Liu, Y. X. Lai, Z. Q. Chen, S. L. Chen, P. Gao, J. H. Chen
Summary: The study analyzed the precipitates formed in Al-Mg-Si alloys added with trace Sc using atomic-resolution scanning transmission electron microscopy, and found that the enhanced thermal stability is attributed to the formation of stabilized beta-related composite precipitates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
You Wu, Haozhi Zhao, Jikang Li, Yuanyuan Zhang, Tong Liu
Summary: The addition of Y4Zr3O12 nanoparticles improved the mechanical properties of ODS steels, particularly enhancing the uniform elongation. This improvement was attributed to the formation of homogeneous oxide NPs and the strong bonding force of the coherent interface.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Biochemical Research Methods
Tong Xin, Yanan Lv, Haoran Chen, Linlin Li, Lijun Shen, Guangcun Shan, Xi Chen, Hua Han
Summary: This article proposes a new method for serial section registration using an unsupervised optical flow network to measure feature similarity and eliminate nonlinear deformation. The optical flow network is also used to estimate and compensate for cumulative registration error, enabling the reconstruction of biological tissue structures. Experimental results demonstrate that this method effectively improves the spatial continuity of serial sections and enhances the accuracy of registration and reconstruction for biological tissue structures.
Article
Materials Science, Multidisciplinary
Xinhua Li, Qingshuang Ma, Ji Dong, Tansir Ahamad, Zongqing Ma
Summary: The Nb-3(Al1-xSnx) superconductor with enhanced critical current density (J(c)) was prepared by mechanical alloying and low-temperature sintering. It was found that dispersed nanosized Nb2Al particles serve as flux pinning centers in Nb-3(Al1-xSnx), leading to an increase in flux pinning force and enhancement of J(c) performance.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Review
Chemistry, Physical
Saeed Sovizi, Robert Szoszkiewicz
Summary: This review presents the structural changes of MoS2 induced by various single atom dopants and their potential applications in energy storage, catalysis, sensing, etc. High resolution scanning transmission electron microscopy and scanning probe microscopy techniques have been used to study the dopant positions and sub-atomic structural changes in MoS2.
SURFACE SCIENCE REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Izabela Potocka, Joanna Szymanowska-Pulka
Summary: This study examined the impact of mechanical stress on the pellicle of grass roots. Results showed that while mechanical stress caused microdamage in the epidermal layers, the pellicle played a protective role in preventing damage to the protodermal cells, thereby safeguarding the root apical meristem from negative effects.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
N. B. Pradeep, M. M. Rajath Hegde, G. C. Manjunath Patel, Khaled Giasin, Danil Yu Pimenov, Szymon Wojciechowski
Summary: This research article discusses the synthesis and characterization of a Ti alloy powder using a high-energetic ball milling process. The study focuses on the formation of ternary Ti alloy with Mg and Sr additions, and the characterization results show the generation of nonequilibrium intermetallic phases and partial amorphization during the ball milling process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Energy & Fuels
Joanna Czub, Akito Takasaki, Andreas Hoser, Manfred Reehuis, Lukasz Gondek, Eugenio Meloni
Summary: The mechanically alloyed amorphous alloys of the Ti45-xVxZr38Ni17 composition have the ability to form a quasicrystalline state after thermal treatment. The amorphous and quasicrystal alloys belonging to the Ti45-xVxZr38Ni17 family can store hydrogen with gravimetric densities above 2 wt.%. Research on the Ti45-xVxZr38Ni17 system with vanadium doped instead of titanium revealed that the amorphous samples with moderate doping (x < 20) can absorb hydrogen while remaining in the amorphous state and transform into a novel glassy-quasicrystal phase during annealing.
Article
Construction & Building Technology
Qidong Li, Bo Li, Xiaomin Li, Zhengwen He, Peng Zhang
Summary: This study investigates the effects of pretreated steel slag on the mechanical properties of cement stabilized materials and the changes in its microstructure. A low-cost and field-applicable pretreatment technique is identified that effectively suppresses the swelling of steel slag. The addition of 18% fly ash to steel slag can effectively reduce its swelling rate, and the pretreated slag can replace half of the gravel in cement stabilized materials. The volcanic ash reaction between the slag and fly ash also contributes to the mechanical properties and durability of the cement stabilized materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
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)