Article
Materials Science, Multidisciplinary
Wenyuan Gong, Mengjing Xie, Yuan Wu, Jishan Zhang
Summary: By increasing the Mg content and adding Cu and Zn into Al-Mg-Si alloys, beta and i' phases were precipitated in the alloy, leading to a synergistic strengthening effect and higher strength compared to single-phase precipitates. Specifically, the yield strength and tensile strength increased by 18.1 and 17.7 MPa, respectively.
Article
Chemistry, Physical
Alice Perrin, Sumit Bahl, Donovan N. Leonard, Richard Michi, Kevin Sisco, Alex Plotkowski, Amit Shyam, Ryan Dehoff, Dongwon Shin, Ying Yang
Summary: This study compares AM and conventionally cast Al-Cu-Ce alloys and finds that despite the refined microstructure of the AM alloys, the formation and stability of phases are consistent with the cast alloys. The study also resolves inconsistencies in the previous descriptions of the Al-Cu-Ce alloy phase diagram and adds Al8Cu3Ce as an equilibrium phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Shaobin Pan, Yongjie Wang, Jinxin Yu, Mujin Yang, Yanqing Zhang, Haiting Wei, Yuechao Chen, Junwei Wu, Jiajia Han, Cuiping Wang, Xingjun Liu
Summary: By utilizing machine learning for material design, a Cu-2.3Ni-0.7Co-0.7Si alloy with promising performance was developed, surpassing the properties of the C70350 alloy. This alloy has the potential to meet various working conditions and broaden the use range of alloys.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Alexander Kodentsov, Joanna Wojewoda-Budka, Lidia Litynska-Dobrzynska, Pawel Zieba, Anna Wierzbicka-Miernik
Summary: The diffusion-controlled interaction of pure Cu with Sn at 488 K results in the formation of epsilon-Cu3Sn and eta-Cu6Sn5 intermetallic compounds, while small additives of Ni do not affect the phase composition of the diffusion zone. Introducing a Cu-Ni alloy with (5-25) at. % of Ni in the interaction at 488 K eliminates the formation of the epsilon-phase and diffusion porosity. TEM investigation reveals a high density of antiphase boundaries providing fast growth kinetics in the product intermetallic layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Rohit Ojha, Kaustubh Kulkarni, Thomas Helander, K. C. Hari Kumar
Summary: The phase equilibria in the Fe-Cr-Ni-Al system were investigated at different temperatures using diffusion couple technique, showing formation of different phases at different temperatures. Thermodynamic calculations using different database combinations were compared to experimental results to predict phase formation under specific conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Cuiping Wang, Liangfeng Huang, Mujin Yang, Xiang Huang, Jinbin Zhang, Shaobin Pan, Shuiyuan Yang, Xingjun Liu
Summary: The study on the Ni-Ta-Si ternary system revealed the discovery of a new F phase and a revision of the composition range of the C14 Laves phase, providing guidance for alloy strategies or designing compositions for Ni-based superalloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
N. A. Belov, T. K. Akopyan, N. O. Korotkova, V. N. Timofeev, P. K. Shurkin
Summary: An experimental heat resistant alloy has been manufactured using electromagnetic casting, achieving an optimal combination of strength, electrical conductivity and thermal stability after cold rolling and annealing. The microstructure, phase composition, mechanical and electrical properties of the alloy have been extensively studied through both thermodynamic calculations and experimental analysis.
Article
Chemistry, Physical
Alice E. Perrin, Richard A. Michi, Donovan N. Leonard, Kevin D. Sisco, Alex J. Plotkowski, Amit Shyam, Jonathan D. Poplawsky, Lawrence F. Allard Jr, Ying Yang
Summary: Microstructural analysis of AM Al-Ce-Ni-Mn alloys revealed unexpected phases, possibly due to non-equilibrium processing conditions or phase stability change caused by Mn addition. Phase analysis of cast samples showed that Mn significantly altered the liquidus projection, suppressing Al3Ni in favor of Al23Ni6(Ce,Mn)4 and promoting Al20Mn2Ce and Al10Mn2Ce phases. The data improved CALPHAD modeling of the quaternary system and confirmed that the phases in AM Al-Ce-Ni with Mn were consistent with cast samples. This study demonstrates the potential for secondary alloying elements to drastically alter phase stability and microstructure in alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jian Lan, Zhen Han, Lin Hua
Summary: Experiments were conducted to analyze the effects of cold stretching and compression on the strength and ductility of extruded Al-Cu-Mg-Si alloy. The alloy with cold stretching showed higher strength but lower ductility, while the alloy without cold deformation exhibited higher ductility but lower strength.
Article
Materials Science, Multidisciplinary
Liu Yang, Xiaosong Jiang, Hongliang Sun, Zhenyi Shao, Yongjian Fang, Rui Shu
Summary: The addition of Y elements can significantly reduce the grain size of Cu-11Al-3Ni-2.5Mn alloy and form Y2O3 particles, increasing the tensile strength of the alloy. With a Y content of 1 wt.%, the alloy also exhibits high damping properties, making it promising for potential applications.
Article
Chemistry, Physical
Qing Cai, Changming Fang, Chamini Mendis, Isaac T. H. Chang, Brian Cantor
Summary: Eutectic alloys were fabricated from the quaternary Al-Cu-Si-Ni system, and a ternary eutectic reaction was found. The as-solidified microstructure exhibited a lamellar theta-Al2(CuNi) phase and fibrous Si morphology. The thermal stability of the eutectic alloy was investigated, and the Ni solution in theta-Al2(CuNi) phase contributed to its thermal stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
P. Priputen, P. Noga, M. Novakovic, J. Potocnik, A. Antusek, R. Bujdak, E. Bachleda, M. Drienovsky, M. Nosko
Summary: The effect of Cu concentration on the order/disorder behavior of AlCoCuxFeNi multi-principal element alloys was investigated. BCC and/or FCC phases were observed in the microstructures of the alloys after casting and annealing at 1050 degrees C followed by slow cooling. Interestingly, the alloys exhibited ordered structures after casting and disordered structures after annealing and slow cooling, contrary to expectations. The ordering in the as-cast state can be explained by the strong affinity of Al to transition metals, resulting in the formation of supercell structures with specific elements occupying sublattices. Disordering after annealing has two reasons: the phase is either composed of nearly pure Cu and defaults to disorder, or it consists of randomly distributed nano-segregated regions within a single phase, appearing macroscopically disordered due to the uniform distribution of all elements in the sublattices. The formation of these nano-segregated regions may be due to the reduction of Gibbs free energy through the interplay of enthalpy and entropy during annealing.
Article
Nanoscience & Nanotechnology
Muzhi Ma, Zhou Li, Zhu Xiao, Yanlin Jia, Xiangpeng Meng, Yanbin Jiang, Yue Hu
Summary: This paper investigates the microstructure and properties of a series of Cu-based alloys fabricated through multi-step thermo-mechanical treatment (TMT). The results show that these alloys exhibit a combination of high strengths and high conductivity. The study also reveals the influence of alloy composition on the properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Jiaying Huang, Siyu Feng, Shiyong Li, Cuilan Wu, Jianghua Chen
Summary: The study systematically investigated the localized corrosion behavior and microstructure of an Al-2.23Cu-0.96Li (wt%) alloy using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that the GPB zones in the alloy do not significantly affect the overall propagation direction of crystallographic corrosion, but are closely related to the formation of nanoscale localized corrosion morphology in the crystallographic corrosion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yanlin Jia, Yong Pang, Jiang Yi, Qian Lei, Zhou Li, Zhu Xiao
Summary: Thermal-mechanical treatment is crucial for high-strength and high-conductivity Cu-Ni-Si alloy synthesis. This study introduced a high-temperature/short-time pre-aging treatment to the thermomechanical processes of Cu-Ni-Si alloys and investigated its effects on the microstructure and properties. The results showed that pre-aging promoted the formation of a nanoscale microstructure, increased initial conductivity, and improved subsequent final aging. This research provides guidance for designing high-performance copper alloys and systematically investigates the strengthening mechanism and microstructure evolution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Spectroscopy
Shui-Yuan Yang, Shao-Yong Jiang, Qian Mao, Zhen-Yu Chen, Can Rao, Xiao-Li Li, Wan-Cai Li, Wen-Qiang Yang, Peng-Li He, Xiang Li
Summary: This study summarizes the principles, functions, and recent advances of EPMA in materials science and geosciences. It also discusses the problems and difficulties commonly encountered in EPMA and proposes measures and solutions to resolve them. The challenges and solutions in specific analytical methods and applications are also summarized.
ATOMIC SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Shaobin Pan, Jinxin Yu, Jiajia Han, Yanqing Zhang, Qinghua Peng, Mujin Yang, Youheng Chen, Xiang Huang, Rongpei Shi, Cuiping Wang, Xingjun Liu
Summary: This study establishes a composition-process-property database for six-element Cu-Cr-Ni-Co-Si-Zr alloys using machine learning techniques. A novel strategy for customized performance design is proposed, and a multi-property segmented screening method is used to rapidly screen four alloys with different performance characteristics from a large number of candidates. One of the alloys acts as a bridge alloy to link Cu-Ni-Co-Si and Cu-Cr-Zr alloys, filling the gap in Cu-based alloys' mid-segment performance.
Article
Chemistry, Physical
Haiting Wei, Cuiping Wang, Shuiyuan Yang, Bohao Yin, Yan Huang, Fangzheng Yu, Jiajia Han, Yong Lu, Xingjun Liu
Summary: In recent years, the hydrolysis of Al-based composite powders to produce hydrogen has attracted significant attention in hydrogen energy research. However, the utilization of hydrogen generation products from Al-based alloys is still limited. In this study, a novel approach was proposed to integrate the hydrogen production and thermal energy storage functions of Al-based composite powders. Al-Bi-Cu composite powders with stable hydrogen production were used as research objects and the hydrogen generation products were directly sintered to obtain Al-Cu alloy based composite phase change thermal energy storage materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Zhifu Yao, Xue Jia, Jinxin Yu, Mujin Yang, Chao Huang, Zhijie Yang, Cuiping Wang, Tao Yang, Shuai Wang, Rongpei Shi, Jun Wei, Xingjun Liu
Summary: Machine learning is capable of accelerating the discovery of proper processing parameters for producing high-quality alloy with good strength and ductility. The optimization of processing parameters can improve the mechanical properties of titanium alloys by enhancing the microstructure.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Hariharan Sriram, Semanti Mukhopadhyay, Kamalnath Kadirvel, Rongpei Shi, Michael J. Mills, Yunzhi Wang
Summary: We investigated the mechanisms of heterogeneous nucleation of γ'' precipitates on pre-existing γ' precipitates in Inconel 718-based alloys using phase field simulations and statistical analysis. The size of γ' precipitates, interfacial energies between γ, γ' and γ'' phases, and the solute depletion zone around growing γ' precipitates were found to determine the choice between the formation of compact and sandwich-like coprecipitates.
Article
Chemistry, Physical
Lipeng Guo, Xiaoqiang Chen, Feng Chen, Shuiyuan Yang, Yixiong Huang, Laisen Wang, Cuiping Wang
Summary: In this study, Cu-Al-Ni based shape memory austenite single crystal with two different orientations was prepared for the first time via simple annealing cast alloy. The single crystal contains L21 matrix and rich-Fe nanoprecipitates with D03 and A2 structures. The martensitic transformation temperatures and chemical compositions of the two different-oriented single crystals are very similar. Both single crystals exhibit complete superelasticity when deformed from 3% to 8%. The critical stress for stress-induced martensite is about 500 MPa for the [2-75] single crystal, which is more than twice that of the [-401] single crystal. The [-401] single crystal shows better cycle stability, maintaining stable and perfect superelasticity over 500 cycles without fracture.
Article
Chemistry, Physical
Yanqing Zhang, Shuiyuan Yang, Laisen Wang, Shaobin Pan, Jinbin Zhang, Xingjun Liu, Cuiping Wang
Summary: This paper reports the superelasticity and excellent cycle stability of boron-microalloyed Co-V-Al-Fe shape memory alloy. The addition of boron results in refined grain size and improved mechanical and superelastic properties in the alloy.
Article
Materials Science, Multidisciplinary
Shiwei Zheng, Chengyan Li, Lipeng Guo, Xinren Chen, Yixiong Huang, Cuiping Wang, Shuiyuan Yang
Summary: This paper demonstrates the remarkable reverse shape memory effect of Cu-(12-14)Mn-20Ga-0.5Mo shape memory alloys, in which the dimension can recover to the state before deformation between 430 K and 550 K. The reverse shape memory effect is attributed to the phase transformation from residual austenite (L21) to martensite (2H). As the temperature increases from 550 K to 680 K, the shape memory effect appears and the dimension increases to the state before deformation. Furthermore, the reverse shape memory effect is gradually enhanced with the increase of Mn content, and the Cu-14Mn-20Ga-0.5Mo alloy exhibits the maximum reverse shape memory effect of 1.63%.
MATERIALS CHARACTERIZATION
(2023)
Article
Geology
Hao Wang, Shui-Yuan Yang, Shao-Yong Jiang, Ji-Qiang Cui, Ruo-Xi Zhang
Summary: In this study, the occurrence and enrichment process of rare earth elements (REE) in rhyolites hosting uranium deposits were investigated. The results show that the altered rhyolites share similar REE sources with the fresh rhyolites, indicating no external REE input. Magmatic crystallization differentiation leads to the initial enrichment of both REE and high field strength elements (HFSE) in the fresh rhyolites, while significant hydrothermal enrichment occurs in the altered rhyolites. Mineralogical studies suggest that REE are mainly hosted in parisite and monazite. Combined with previous research, the REE mineralization in Dazhou has similar characteristics to uranium mineralization, suggesting a common source and mineralization event.
ORE GEOLOGY REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Shuaishuai Chen, XiaoQiang Chen, LiPeng Guo, ShiWei Zheng, Feng Chen, Cuiping Wang, Shuiyuan Yang
Summary: This study reports for the first time the shape memory effect of novel iron-alloyed Cu-Al-Ga shape memory single crystals. The microstructure, crystal structure, martensitic transformation and shape memory effect of different compositions were investigated. The alloys consist of dominant martensite and fine bcc nanoparticles, except for the master alloy. The martensitic transformation start temperatures vary among the studied alloys. The shape memory effect clearly increases with increase of pre-strains, reaching a maximum of 6.8% strain recovery for Cu-14Al-4Ga-3Fe single crystal with 10% pre-strain.
Article
Energy & Fuels
Cuiping Wang, Yan Huang, Haiting Wei, Fangzheng Yu, Mingshuai Wang, Yihui Guo, Jinbin Zhang, Rui Deng, Shuiyuan Yang, Xinjun Liu
Summary: This paper presents a strategy for self-encapsulated Al-Si base phase change materials with high thermal energy storage performance using hydrogen generation products. The materials were prepared by hydrolyzing Al-Bi-Si alloy composite powders and then calcining the hydrolysis products. The prepared materials showed good sphericity and a thermal energy storage density of 117.3 J/g-240 J/g. The self-encapsulation of phase change materials was achieved through the formation of an Al2O3 protective layer. The Al2O3 layer exhibited strong thermal stress resistance and maintained good thermal energy storage performance under thermal cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Zhifu Yao, Zhipeng Chen, Mingliang Ouyang, Xinren Chen, Mujin Yang, Zhou Li, Cuiping Wang, Tao Yang, Rongpei Shi, Zheng Zhong, Xingjun Liu
Summary: Stellite alloys are engineered to have desired microstructures in terms of carbide type, size, shape, and distribution for optimal hardness and wear resistance. Through image recognition technology and mathematical algorithms, the quantitative relationship between carbides and hardness is established. This work contributes to the development of Stellite alloys and provides insights into the CCH relationship of other cemented carbide alloys.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Lipeng Guo, Feng Chen, Shuaishuai Chen, Yixiong Huang, Jinbin Zhang, Cuiping Wang, Shuiyuan Yang
Summary: This study investigates the effect of adding small amounts of Cr, Mo, or V on the microstructure, crystallographic features of martensitic transformation, and shape memory effect of Cu-13.5Al-4Ni master alloy. The results show that the studied alloys consist of dominant 13'1 (18R) martensitic structure and fine bcc precipitates. The martensitic transformation starts temperatures of the alloys are 414K, 385K, and 394K for X = 0.5Cr, 0.5Mo, or 0.5V, respectively. Furthermore, a decrease in grain size improves the shape memory effect in Cu-13.5Al-4Ni alloys, with the maximum shape memory effect reaching 6.2%, 5.8%, and 5.5% for X = 0.5Cr, 0.5Mo, and 0.5V, respectively.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
Article
Materials Science, Multidisciplinary
Xingjun Liu, Qinghua Peng, Shaobin Pan, Jingtao Du, Shuiyuan Yang, Jiajia Han, Yong Lu, Jinxin Yu, Cuiping Wang
Summary: A machine learning prediction method is proposed to efficiently and reliably predict the microstructures and mechanical properties of biomedical titanium alloys. Using this method, a low modulus beta-Ti alloy was successfully designed.
Article
Nanoscience & Nanotechnology
Shiwei Zheng, Shuaishuai Chen, Shen Hong, Zhongliang Su, Jinbin Zhang, Laisen Wang, Cuiping Wang, Shuiyuan Yang
Summary: A Cu-10Al-6Mn-3Fe-4Ga single crystal with excellent reversible martensitic transformation and shape memory effect was investigated. The microstructure consists of dominant 2H martensite and Fe-rich nanoparticles. A large stress platform and full shape recovery characteristics were observed in a certain strain range.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(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)
