Article
Materials Science, Multidisciplinary
Gareth F. Stephens, Megan W. Owen, El Mehdi Ghardi, Alberto Fraile, Susan Ortner, Michael J. D. Rushton, William E. Lee, Aidan Cole-Baker, Simon C. Middleburgh
Summary: The presence of lithium in the coolant of nuclear reactors without boron has been found to accelerate the corrosion of zirconium alloys. Atomistic simulations have predicted a high solubility of lithium in amorphous structures, which could offer a mechanism for the observed lithium-accelerated corrosion of Zr-based alloys.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Chemistry, Physical
Chunming Wang, Yang Shuai, Youwen Yang, Da Zeng, Xiongwei Liang, Shuping Peng, Cijun Shuai
Summary: The amorphous Mg-Zn-Ca alloy fabricated by LPBF exhibits excellent corrosion resistance and an ideal corrosion rate, which is expected to promote the application of Mg alloy in orthopedics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
W. Xu, B. Zhang, K. Du, X. Y. Li, K. Lu
Summary: By means of cryogenic plastic deformation, a high proportion of relaxed grain boundaries can be generated in the Al-5Mg alloy, which is essential for stabilizing nanostructured alloys.
Article
Materials Science, Multidisciplinary
Morteza Taheri, Mansour Razavi
Summary: This study investigates the effect of the ultrasonic field on the preparation of amorphous/crystalline Fe-based coatings. Fe86.3Si5.9B3.2Cr4.6 (wt%) powder was deposited on GTD-111 superalloy substrate with and without ultrasonic field. The use of an ultrasonic field inhibits columnar growth and creates equiaxed grains, while also increasing the amorphous phase by 34.5%. The results show improved corrosion behavior and reduced friction coefficient when using the ultrasonic field.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Kazutoshi Inoue, Kazuaki Kawahara, Mitsuhiro Saito, Motoko Kotani, Yuichi Ikuhara
Summary: The study focuses on the mathematical framework for the polyhedral arrangement of grain boundaries in polycrystalline materials, which is essential for designing high-performance materials. The research shows that the grain boundary region can only be packed by specific polyhedral units, and the 3D arrangement of atomic polyhedra around grain boundaries is systematically described through numerical analysis and the modified Farey diagram.
Article
Materials Science, Multidisciplinary
Kazutoshi Inoue, Ji-Young Roh, Kazuaki Kawahara, Mitsuhiro Saito, Motoko Kotani, Yuichi Ikuhara
Summary: This study characterized the atomic structures of grain boundaries in ZnO using scanning transmission electron microscopy and discussed the misorientation dependence of the atomic structures around grain boundaries. The polyhedral-unit arrangements for arbitrary tilt angles were described and predicted by a number-theory-based approach, revealing that geometrical restrictions determine the ZnO grain boundary structures.
Article
Materials Science, Ceramics
Chunyan Li, Jianshu Zhai, Lin Tian, Yu Lu, Xiaocheng Li, Shengzhong Kou
Summary: The Fe-Cr-Mo-B-C coating was prepared on 45 steel using laser cladding. The effects of different process parameters on the properties of the coatings were analyzed. The increase of laser power or overlap rate resulted in more serious crystallization, porosity, and even cracks, reducing the overall properties of the coatings. The microhardness of the coatings was determined by the amorphous phase and hard phases B6Fe23 and Cr2B. The optimal conditions for laser cladding were identified as a power of 1400 W with an overlap rate of 30%.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Peter Trusov, Nikita Kondratev, Matvej Baldin, Dmitry Bezverkhy
Summary: This paper examines the impact of subgrain coalescence at initial high-angle boundaries on the formation and growth of recrystallization nuclei under thermomechanical treatment. It is found that subgrain clusters at high-angle boundaries are preferred for recrystallization. However, intensive coalescence can slow down or even halt the recrystallization process. A multilevel modeling approach with internal variables is employed to solve the problem, and the results suggest that the local interaction between crystallites plays a significant role in dynamic recrystallization and recovery.
Article
Materials Science, Multidisciplinary
Chen-Hao Xu, Yao-Ping Xie, Mei-Yi Yao, Li-Juan Hu, Xiao-Dong Lin
Summary: This study investigates the role of copper alloying element on the tensile strength of the grain boundary in oxide of zirconium alloys using first principles calculation. The results show that copper atoms can enhance the tensile strength of the grain boundary, leading to improved corrosion resistance of zirconium alloys.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zigen Xiao, Yun Huang, Zhixiao Liu, Wangyu Hu, Qingtian Wang, Chaowei Hu
Summary: The influence of grain boundaries on Fe-H2O interfacial corrosion was studied using molecular dynamics simulation. It was found that the corrosion rate was significantly faster at polycrystalline grain boundaries, and the stress and vacancies played important roles in promoting intergranular corrosion.
Article
Chemistry, Physical
Xin An, Wei Jiang, Linhua Zhu, Lingchao Xu, Junfeng She, Jing He, Wenshuai Zhu, Huaming Li
Summary: Grain boundaries can provide highly active surfaces in catalysts, but they are often ignored due to structural variations and design difficulties. This study proposes a novel strategy to prepare nickel molybdate with rich grain boundaries (RGB-NMO). The optimized morphology of RGB-NMO increases the exposure of active sites and facilitates mass transfer in the oxidative desulfurization reaction. Moreover, the engineered grain boundaries can modulate the atomic composition and electronic structure, leading to enhanced hydrogen peroxide activation capacity. The synthesized RGB-NMO demonstrates attractive desulfurization efficiency and cycling stability, providing inspiration for the design of functional materials for efficient ODS treatment.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Xinyi Liu, Wanpeng Li, Wenyu Chen, Tzu-Hsiu Chou, Chenchong Wang, Jianmin Ren, Xu Wang, Jacob C. Huang, Ming Wu
Summary: The Co40Cr20Ni30Al5Ti5 multi-principal element alloy with heterogeneous grain structure and nano L12 precipitates is successfully designed by cold rolling and proper heat treatment. The alloy with heterogeneous grain structure exhibits excellent corrosion resistance and passivation performance, which is attributed to the high-density grain boundaries in fine grains and abundant defects in deformed grains, forming a thicker and more efficient passive layer to inhibit the initial pitting corrosion. This finding suggests that the developed alloy with heterogeneous grain structure can possess an excellent combination of corrosion resistance and mechanical properties, making it promising for future applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Sebastien Kerisit, Thiruvillamalai Mahadevan, Jincheng Du
Summary: By developing a patchy particle model of hydrated amorphous silica, researchers have successfully addressed the issue of reproducing the residual rate of glass corrosion in MC simulations. While the model cannot simultaneously replicate the structure and dynamics of the systems of interest with a single set of parameters, it effectively describes the connectivity of hydrated amorphous silica structures and the local coordination geometry of individual species.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Cheng Chen, Shaoyu Li, Chenrong Ling, Youwen Yang, Chengde Gao, Yageng Li, Xinyi Xiao, Wenhao Zhou, Cijun Shuai
Summary: This study used laser powder bed fusing technology to fabricate amorphous Mg-Zn-Ca and Mg-Zn-Ca-Y alloy parts. The as-built parts exhibited amorphous structure and few nanocrystals due to high cooling rates. Y alloying promoted the formation of quasicrystal phase with high hardness and elastic modulus, leading to improved yield strength and plasticity. Despite micro galvanic corrosion, the parts showed moderate corrosion rate and favorable biocompatibility in vitro cell tests.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Sung Bo Lee, Seung Jo Yoo, Jinwook Jung, Heung Nam Han
Summary: The irradiation of high-energy particles can affect the grain-boundary structure of polycrystalline nuclear materials, with different reactions observed for different grain-boundary characteristics. By examining different types of grain boundaries in a model system, it was found that tilt boundaries became roughened while twist boundaries became faceted under the same irradiation conditions.
SCRIPTA MATERIALIA
(2021)
Article
Metallurgy & Metallurgical Engineering
Shiwei Zhang, Yadong Wang, Zhihui Xiong, Minhao Zhu, Zhijie Zhang, Zhuguo Li
Summary: The study investigated the effects of activating fluxes on weld bead morphology, arc behavior, electrical signals, and temperature field. Results showed that the addition of SiO2, TiO2, ZnO, and Fe2O3 improved weld formation and penetration depth, while also reducing welding voltage and increasing welding current. However, CaO and B2O3 dramatically deteriorated process stability.
WELDING IN THE WORLD
(2021)
Article
Materials Science, Multidisciplinary
Wenjie Ren, Yuan Chen, Ling Lan, Fenggui Lu, Zhuguo Li
Summary: The laser-welded Inconel 617 superalloy exposed at 750 degrees C for up to 7000 h showed the formation of carbides and phases, resulting in an increase in hardness and a significant drop in impact toughness.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Hongyu Xiao, Jiwei Geng, Yugang Li, Hongping Li, Dong Chen, Mingliang Wang, Zhuguo Li, Haowei Wang
Summary: In this study, the quench sensitivity of TiB2/7050Al composite was investigated using Jominy end quench test. It was found that the hardness decreased significantly with increasing distance from the quenching end, as more eta phases precipitated and coarsened on grain boundaries. The composite was observed to be more quench sensitive than its alloy counterpart, attributed to four microstructure characteristics inherited from the aluminum matrix and originating from the TiB2 addition.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Zhihui Xiong, Xiaotong Pang, Shilong Liu, Zhuguo Li, R. D. K. Misra
Summary: The addition of nickel (Ni) in selective laser melted titanium alloy can effectively refine grain size, avoid the formation of brittle phases, and significantly increase the strength and ductility of the alloy. Microalloying with Ni enhances the properties of titanium alloys processed by additive manufacturing.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Bolun Han, Chengcheng Zhang, Kai Feng, Zhuguo Li, Xiancheng Zhang, Yao Shen, Xiaodong Wang, Hiroyuki Kokawa, Ruifeng Li, Zhiyuan Wang, Paul K. Chu
Summary: The study fabricated a near full-dense hierarchical CrCoNi medium entropy alloy (MEA) using selective laser melting (SLM), achieving superior yield strength at 77K. The high strength of the material stems from a hierarchical microstructure composed of high-density dislocations and low-angle grain boundaries (LAGB). The results suggest that SLM is a viable technique for fabricating dense hierarchical CrCoNi MEA and offer a design strategy to further improve mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Xiaotong Pang, Zhihao Xiong, Shilong Liu, Devesh Misra, Zhihui Xiong, Zhuguo Li
Summary: This study elucidates the microstructural evolution and strengthening mechanism of commercial purity Ti (CP-Ti)/Ti-0.4Ni graded material (GM) fabricated by laser melting deposition (LMD). Microalloying with Ni in the GM improved the mechanical properties and avoided composition reapportionment issues at the interface, highlighting the potential of microalloyed Ti-0.4Ni for providing high-performance graded materials by LMD.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Hong-yu Xiao, Yu-gang Li, Ji-wei Geng, Hong-ping Li, Ming-liang Wang, Dong Chen, Zhu-guo Li, Hao-wei Wang
Summary: This study investigates the effects of TiB2 and Zr on the microstructure, aging response, and mechanical properties of hot-extruded Al-Zn-Mg-Cu based materials. It was found that TiB2 can refine grain size and enhance hardness, while Zr primarily inhibits grain growth. Both additives have some positive impacts on aging kinetics and hardness.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Review
Optics
Dongshi Zhang, Zhuguo Li, Koji Sugioka
Summary: The demand for new nanoscience-based technologies is increasing, with LAL gaining attention for nanomaterial synthesis. It is easy to set up and perform, allowing for a diverse range of nanomaterials to be synthesized using different targets and liquids, with the choice of liquids impacting the final products significantly.
JOURNAL OF PHYSICS-PHOTONICS
(2021)
Article
Materials Science, Multidisciplinary
Ruijie Liu, Dongshi Zhang, Zhuguo Li
Summary: This study demonstrates the development of tunable iridescent antireflective surfaces through femtosecond laser ablation of tungsten and molybdenum, synthesizing functional metal-oxide nanomaterials, in situ deposition and hierarchical nanostructuring of LIPSSs. Adjusting the scanning interval allows modulation of particle deposition rates on the surface, leading to the formation of better ultrabroadband antireflective surfaces with less pronounced iridescence. Loose deposition of MoOx and WOx particles outperforms tight deposition for ultrabroadband antireflective applications, enhancing antireflectance performances significantly.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Xiaotong Pang, Zhihui Xiong, Chengwu Yao, Junhao Sun, R. D. K. Misra, Zhuguo Li
Summary: The metastable beta titanium alloy TB2 fabricated by laser melting deposition showed good ductility and high ultimate tensile strength. The beta solution plus two-step aging treatment was proved to achieve a good combination of strength and ductility for the TB2 alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Coatings & Films
Yulei Feng, Xiaotong Pang, Kai Feng, Yueqiao Feng, Zhuguo Li
Summary: A novel test method, self-restraint test, was proposed to evaluate the crack resistance of high hardness coatings prepared by laser cladding. The method was effective in evaluating different coatings and establishing empirical formulas. It has significant implications for the preparation of high hardness crack-free coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yulei Feng, Xiaotong Pang, Kai Feng, Yueqiao Feng, Zhuguo Li
Summary: Fe-based coatings were prepared on 42CrMo by laser cladding with a trace amount of boron added. The effect of additive boron level on the reinforcements and compressive properties of the coating was analyzed. It was found that the addition of boron can significantly improve the strength and plasticity of the coating, and a eutectic structure composed of Fe3C type carbides and gamma-Fe was formed by reducing the formation energy of Fe3C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Hongyu Xiao, Zhiping Wang, Jiwei Geng, Chengcheng Zhang, Yugang Li, Qing Yang, Mingliang Wang, Dong Chen, Zhuguo Li, Haowei Wang
Summary: This study investigated the precipitation and crystallographic relationships between the quench-induced S phase and Al matrix in an Al-Zn-Mg-Cu alloy using scanning transmission electron microscopy and scanning precession electron diffraction. It was found that higher lattice strain energy led to Zn segregation at the S-Al interfaces and the heterogeneous nucleation of nanosized eta' precipitates. The crystallographic orientation relationships between the S phases and precipitates were reported and discussed for the first time in an Al-Zn-Mg-Cu alloy.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Electrical & Electronic
Ruijie Liu, Dongshi Zhang, Sihan Ji, Yunyu Cai, Changhao Liang, Zhuguo Li
Summary: This study demonstrates the development of multifunctional metasurfaces through femtosecond laser ablation of titanium, resulting in macropore/LIPSS micro/nanostructures. These structures exhibit superior performance in ultrabroadband UV-vis-NIR-MIR absorbance, photothermal conversion, and thermal-emission induced reflectance oscillation. The density and size of macropores can be controlled by adjusting laser power and scanning velocity, allowing for optimization of different functions.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Optics
Dongshi Zhang, Xinzhuo Li, Yao Fu, Qinghe Yao, Zhuguo Li, Koji Sugioka
Summary: This work reveals that fluid dynamics induced by femtosecond laser ablation in liquid can break the laser polarization state restriction and produce irregular circular-LIPSS and crisscross-LIPSS. Liquid vortex plays a crucial role in the formation of macropores and complex fluid dynamics on mountain-like microstructures can cause the formation of CCLIPSS. This opens up new possibilities to diversify the morphologies of LIPSS formed by femtosecond laser ablation in liquid.
OPTO-ELECTRONIC ADVANCES
(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)
