Article
Nanoscience & Nanotechnology
Xiongpeng Zhou, Hongge Yan, Jihua Chen, Weijun Xia, Bin Su, Xinyu Li, Wensen Huang, Min Song
Summary: By introducing beta(1)' (MgZn2) precipitates through solution treatment and subsequent aging, a new approach has been discovered to improve the damping capacity and mechanical properties of ZK60 magnesium alloy. The coherent orientation relationships between the beta(1)' phase and the a-Mg matrix, as well as the shearing or bypassing of dislocations on the beta(1)' precipitates depending on their sizes and spacing, contribute to the synchronous improvement in mechanical and damping properties of the alloy. The modified Granato-Lucke (G-L) model presented in this work analyzes the favorable damping capacity of the aged ZK60 alloy, where the interaction between the beta(1)' precipitates and the mobile dislocations serves as a new source of energy dissipation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Cong Dang, Jingfeng Wang, Jinxing Wang, Di Yu, Wenxuan Zheng, Changbing Xu, Zihong Wang, Le Feng, Xianhua Chen, Fusheng Pan
Summary: An ultrahigh strain-independent damping in Mg-1Mn alloy was achieved by the cold rolling process. The introduction of non-basal dislocations and stacking faults through cold rolling improved the strength, plasticity, and damping capacity of the alloy. The increase in moveable dislocations and stacking faults effectively enhanced the alloy's damping capacity. This work presents a new strategy for developing high-strength, high-plasticity, and high-damping magnesium alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Xiongpeng Zhou, Hongge Yan, Jihua Chen, Weijun Xia, Huaming Zhu, Bin Su, Min Song
Summary: The effect of texture on the damping capacity of ZK60 magnesium alloy was investigated through compression experiments. It was found that both the dislocation networks, twins, and the basal texture intensity affect the damping capacity. This research provides a direction for the study of high-strength and high-damping magnesium alloys.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Dan Wang, Xiaochun Ma, Ruizhi Wu, Huajie Wu, Jiahao Wang, Shun Zhang, Jinghuai Zhang, Legan Hou
Summary: The combination of extrusion and rolling processes can form twin and LPSO structures in magnesium alloys, which is beneficial for enhancing the damping and mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Cong Dang, Jingfeng Wang, Jinxing Wang, Di Yu, Wenxuan Zheng, Changbing Xu, Zihong Wang, Le Feng, Xianhua Chen, Fusheng Pan
Summary: In this study, a bimodal grain structure consisting of fine recrystallized grains and coarse unrecrystallized grains was obtained by adding Mn into the Mg matrix and using low extruded temperature. The fine recrystallized grains promote grain boundary slip and enhance the alloy's plasticity. The presence of parallel dislocations in the unrecrystallized grains, caused by the suppressed dislocation recovery and dynamic recrystallization rate at low temperature, leads to a high work hardening rate in the bimodal grain structure, resulting in a high yield strength and improved damping capacity at room temperature for Mg-Mn alloys.
Review
Chemistry, Physical
Jinxing Wang, Zhicheng Wan, Cong Dang, Yi Zou, Jingfeng Wang, Fusheng Pan
Summary: Magnesium alloys with high damping, high specific strength and low density have attracted attention. This paper comprehensively reviews the damping mechanisms and internal factors affecting the damping properties of magnesium alloys. Understanding these mechanisms and factors is important for developing novel high-damping magnesium alloys.
Article
Chemistry, Physical
Kibeom Kim, Yebin Ji, Kwonhoo Kim, Minsoo Park
Summary: For the widespread industrial use of magnesium alloys, it is necessary to develop a method that can impart high damping properties while maintaining mechanical properties. This study investigated the effects of twinning and annealing on the recrystallization process, which can affect the damping capacity of magnesium alloys. Hot rolling and annealing were conducted on an AZ31 alloy, and the microstructure, texture, hardness, and internal friction of the specimens were measured. The results showed that twinning was induced during hot rolling, and annealing led to static recrystallization within the twinning grains. The internal friction increased with the fraction of twinning and annealing temperature.
Article
Nanoscience & Nanotechnology
Lunchao Zhang, Yuan Yuan, Jun Wang, Tao Chen, Jingfeng Wang, Fusheng Pan
Summary: High temperature heat treatment Mg-0.69Sn-0.69Y alloy exhibited a high damping capacity (0.201 at epsilon=1 x 10-3) and a very low critical strain amplitude at room temperature (epsilon cr1=2.97 x 10-5), which can be ascribed to the combined effects of purified matrix phase and subgrain interfaces. The substructure is unstable and the damping capacity decreases with temperature increment.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Qiangbing Liu, Jiaxuan Ma, Shiyu Luan, Jinhui Wang, Shuai Yuan, Li Han, Peipeng Jin
Summary: The temperature damping capacities of Mg-3Al-1Zn-xSn alloys were investigated using a DMA, and the effects of Sn concentration and loading frequency were examined. The addition of Sn resulted in shifts in the damping peaks, indicating the influence of second phases near grain boundaries. The enhanced damping capacity at different frequencies was attributed to increased point defects and precipitates before 220°C, while microplastic internal friction dominated the damping mechanism in the later part of the test.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Mahmoud Ebrahimi, Li Zhang, Qudong Wang, Hao Zhou, Wenzhen Li
Summary: The research showed that the damping behavior of AZ91D alloy can be significantly improved by the CEC process and the addition of CNTs, particularly at high temperatures. Additionally, while the addition of 0.5 wt% CNTs may decrease room temperature damping, the performance can be enhanced with the right amount of CNTs added.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Zhirou Zhang, Qinghuan Huo, Yuxiu Zhang, Zhenyu Xiao, Aki Hashimoto, Xuyue Yang
Summary: The study investigated the effects of artificial aging on the tensile creep resistance of a hot-rolled Mg-3.5 wt%Nd alloy. It found that the type of precipitates and solute depletion in grain boundaries changed with aging duration, leading to grain boundary migration and PFZ widening, which decreased creep resistance. The sample with narrow PFZs and dislocations cutting beta' phases showed the best creep resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Hyun Ji Kim, Young Min Kim, Jun Ho Bae, Jonghun Yoon, Sung Hyuk Park
Summary: In this study, a new alloy, AZXW9100, with high corrosion and ignition resistance characteristics is developed. The aging hardening and Mg17Al12 precipitation behavior of this alloy are investigated and compared with a commercial AZ91 counterpart. The results show that adding small amounts of Ca and Y to AZ91 alloy significantly alters the precipitation behavior during aging.
METALS AND MATERIALS INTERNATIONAL
(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
Chemistry, Physical
Jiao Tang, Qinghuan Huo, Zhirou Zhang, Yuxiu Zhang, Shilin Zhao, Aki Hashimoto, Xuyue Yang
Summary: This study investigated how to enhance the creep resistance of dilute Mg-Nd alloys through pre-compression and subsequent peak-aging. By studying samples with different treatments, it was found that the PC-AA sample exhibited the best creep resistance, followed by the NPC sample, and the PC sample showed the poorest performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
T. T. Sasaki, J. Y. Lin, P. Yi, Z. H. Li, S. E. Prameela, A. Park, E. Lipkin, A. Lee, M. L. Falk, T. P. Weihs, K. Hono
Summary: In this study, the deformation-induced precipitation of G.P. zones in Mg-9Al and Mg-5 Zn alloys during equal channel angular extrusion has been reported. Atom probe tomography and hybrid molecular dynamics/Monte Carlo simulations suggest that strategic control of atomic-scale defects can generate novel microstructures, thereby strengthening the deformed Mg alloys.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Bingqiang Wei, Wenqian Wu, Mingyu Gong, Shuwei Yu, Song Ni, Min Song, Jian Wang
Summary: Deformation twinning is crucial in determining the mechanical behavior of hexagonal metals. Lowering the energy of basal stacking faults can promote the formation of basal stacking faults and face centred cubic phase, which affects the propagation and growth of deformation twins. This study provides insights into the influence of lowering basal stacking faults energy on twinning behaviors in hexagonal metals.
Article
Materials Science, Multidisciplinary
Haijie Zhang, Xiaoshan Liu, Dexin Ma, Min Song, Andreas Ludwig, Abdellah Kharicha, Menghuai Wu
Summary: Single-crystal superalloy turbine blades fabricated using directional solidification are prone to flow-induced defects such as freckles and eutectic accumulation. This study proposes a novel method to digitally simulate the solidification process and verifies its effectiveness through experiments and simulations. It also highlights the importance of the internal structure and other process conditions in freckle formation.
Article
Materials Science, Multidisciplinary
Xiongpeng Zhou, Hongge Yan, Jihua Chen, Weijun Xia, Huaming Zhu, Bin Su, Min Song
Summary: The effect of texture on the damping capacity of ZK60 magnesium alloy was investigated through compression experiments. It was found that both the dislocation networks, twins, and the basal texture intensity affect the damping capacity. This research provides a direction for the study of high-strength and high-damping magnesium alloys.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Li Wang, Xiaopeng Liang, Bin Liu, Michael Oehring, Jonathan Paul, Jie Liu, Min Song, Florian Pyczak, Yong Liu
Summary: The interaction between dislocations and perovskite Ti3AlC precipitates in a titanium alloy was investigated. It was found that the Ti3AlC carbides can be sheared by dislocations, leading to the formation of stacking faults and crossed stacking fault configurations. These stacking faults are induced by the shear of Shockley partial dislocations and further extended along specific crystal planes.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Feng Wang, Yue Li, Xinren Chen, Huan Zhao, Khurram Yaqoob, Yong Du, Zhangwei Wang, Min Song
Summary: The formation of dislocation gradient through pre-torsion significantly increases the strength of Al alloys without reducing uniform elongation, leading to exceptional mechanical properties.
MATERIALS RESEARCH LETTERS
(2023)
Article
Engineering, Mechanical
Xu Zhang, Yang Gui, Minjie Lai, Xiaochong Lu, Ji Gu, Feng Wang, Tao Yang, Zhangwei Wang, Min Song
Summary: The microstructures, mechanical properties, and deformation substructures of gradient Mo0.3NiCoCr medium-entropy alloys with very coarse grain size created by pre-torsion have been investigated. The strength of these alloys increases with the increase of torsion angle, while the tensile elongation remains the same, suggesting the enhanced strength-ductility synergy. The combination of experimental characterization and theoretical modeling enables to clarify the underlying strengthening and strain hardening mechanisms, providing guidance for optimizing the mechanical performance of structural materials via tuning the design of gradient structure.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Zonglian Huang, Bo Wang, Fei Liu, Min Song, Song Ni, Shaojun Liu
Summary: The influence of laser energy density and heat treatment on the microstructure and properties of Co-Cr-Mo-W alloys fabricated by selective laser melting (SLM) was investigated. The SLM-ed Co-Cr-Mo-W alloys displayed high strength and good ductility when the laser power, scanning speed, and scanning space were set as 160 W, 400 mm/s, and 0.07 mm, respectively. The heat treated alloys showed finely distributed precipitates ranging from nano-to macro-scale in Co-Cr alloys grains and/or along the grain boundaries. By tailoring the microstructure and morphology of SLM-ed alloys during heat treatment, Co-Cr-Mo-W alloys with an excellent combination of strength and ductility can be achieved. The tensile strength, yield strength, and elongation were 1221.38 +/- 10 MPa, 778.81 +/- 12 MPa, and 17.2 +/- 0.67%, respectively.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Weijing Liu, Xinglong An, Wenting Jiang, Song Ni, Min Song
Summary: In this study, the effects of strain rate and strain on the microstructure and hardness of polycrystalline cobalt were investigated. It was found that high strain rate promoted the activation of various types of twinning and incomplete dynamic recrystallization during high-speed impact. Quasi-static compression mainly resulted in dislocation slip and the activation of specific twins. The high-speed compressed samples exhibited higher hardness values due to the higher density of twins produced during high-speed compression.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Longjun Li, Li Wang, Zhida Liang, Junyang He, Min Song
Summary: The formation of various types of oxide scales on the surface and along the grain boundaries of a complex CoNi-based superalloy was investigated at 900 degrees C. A complex multilayered oxide scale was formed under steady-state conditions (oxidation time up to 24 hours). After the breakdown of the steady-state oxide scale (oxidation for 48 hours), different types of oxide scales occurred. It was also observed that oxidation gradually extended into the specimen interior along the grain boundaries, caused by selective oxidation of elements due to differences in equilibrium oxygen partial pressures. Local microstructure and oxygen concentration were found to significantly influence the formation and configuration of the oxide scales in the investigated alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Letter
Materials Science, Multidisciplinary
Hao Zhang, Bingqiang Wei, Xiaoqin Ou, Song Ni, Xiaozhou Liao, Min Song
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yang Yang, Xiaoqin Ou, Hao Zhang, Min Song
Summary: Carbon plays a crucial role in enhancing the mechanical properties of steels as a principal alloying element. This study investigates the interstitial sites for carbon atoms during deformation-induced phase transformations in Fe-C alloys through molecular dynamics simulations, providing insights into the microstructural evolution at the atomic scale. The distribution and arrangement of carbon atoms in the Fe lattice affect the formation of stacking faults and the pinning effects on dislocation movement.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yangbo Yu, Hongge Yan, Huaming Zhu, Jihua Chen, Weijun Xia, Youping Sun, Bin Su, Yifu Deng, Min Song
Summary: This study investigates the DRX behavior, grain structure, and texture evolution of bimodal TC17 alloy during high strain rate hot compression at 840°C and 900°C. The results show that the lamellar alpha s has almost no impact on the DRX of the beta phase due to dynamic transformation. The formation of dense LAGB cells in the beta phase is influenced by the decomposition of alpha p and the strain level.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jie Yan, Min Song, Dong-Ying Zhou, Guowei Ni, Muhua Gu, Shek-Man Yiu, Xiuwen Zhou, Liang-Sheng Liao, Yun Chi
Summary: Efficient saturated red and near-infrared emissive bis-tridentate Ir(III) complexes have been synthesized for the development of organic light-emitting diodes (OLEDs). The resulting OLED devices demonstrate high external quantum efficiencies and emission peak wavelengths.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Changchang Liu, Ji Gu, Min Song
Summary: This study investigates the hot rolling treatment and water quenching process on a TC18 titanium alloy, revealing the formation of a new phase induced by stress and assisted by another phase. The existence of a new phase and diffuse streaks during hot working were also observed. The research confirms the presence of dynamic recrystallization (DRX), with recrystallization grains nucleating preferentially at high-energy areas such as grain boundaries and shear bands. The elongation decreases and tensile strength increases with increasing deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yangbo Yu, Hongge Yan, Huaming Zhu, Jihua Chen, Weijun Xia, Chang Xu, Min Song
Summary: Modified alpha precipitation based on severely deformed beta phase and optimized aging treatments is crucial for strengthening titanium alloys. This study investigated the beta phase features of high strain rate hot compressed TC17 alloy and the precipitation behavior of alpha phase during single-step and duplex aging. The results showed that high strain rate hot compression significantly promoted the nucleation and growth of alpha phase, and duplex aging was more beneficial for refining alpha precipitates.
MATERIALS TODAY COMMUNICATIONS
(2023)
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)
