Article
Chemistry, Physical
Masaki Tahara, Kazuya Hasunuma, Hideki Hosoda
Summary: This study investigated the decomposition process of the isothermal alpha '' phase in beta-Ti alloys, and found that the resulting alpha + beta dual phase inherited the microstructural characteristics of the alpha ''(iso) phase. The research results indicate the existence of a strict variant selection rule between the decomposed alpha and beta phases, with a specific variant combination observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
A. D. Timoshenko, O. O. Matvienko, A. G. Doroshenko, S. Parkhomenko, I. O. Vorona, O. S. Kryzhanovska, N. A. Safronova, O. O. Vovk, V. N. Baumer, I Matolinova, S. Hau, C. Gheorghe, R. P. Yavetskiy
Summary: YAG:Sm3+ transparent ceramics with 3-15 at.% Sm3+ doping were prepared by solid-state reactive sintering. The effect of samarium ions concentration on the microstructure and optical properties of the ceramics was investigated. It was found that the solubility limit of samarium ions in the garnet matrix was within the range of 9-11 at.%. The absorption coefficients corresponding to Sm3+ ions transitions increased linearly with increasing Sm3+ doping, and the intensities of the satellites and the broadening of the main spectral lines also increased with the concentration of Sm3+ ions. Highly-doped YAG:Sm3+ ceramics with 9 at.% Sm3+ ions showed low optical losses at 808 nm and a high absorption coefficient at 1064 nm, making them suitable for suppressing parasitic oscillations in YAG:Nd3+ lasers at 1064 nm.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Walter J. Williams, Tiankai Yao, Xiaofei Pu, Luca Capriotti
Summary: This study focuses on the micro-burnup (BU) studies of the uranium-zirconium (U-Zr) fuel system, where the microstructure undergoes a transformation from as-fabricated to starting microstructure in the reactor. Two U-Zr specimens were irradiated and the results show that the U-22.5 at.% Zr specimen retained its bulk features, while the U-52.8 at.% Zr alloy transformed into an equiaxed granular microstructure immediately upon reactor insertion. The study also discovers a face-centered-cubic Zr rind on the surface of the sample, indicating a possible diffusion-based process for the Zr-rind decomposition.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Ceramics
J. C. Yang, R. J. Duan, Q. F. Wang, W. Shang, Q. Guo, Y. J. Chen, Y. X. Dai, B. Z. Sun, Y. Qi
Summary: A series of Ni-doped Bi2212 ceramics samples were synthesized using the Pechini sol-gel method, and their microstructure and structure stability were investigated using various characterization techniques. The results showed that with increasing Ni-doping amount, Ni atoms preferentially occupied Sr-sites, resulting in an increase in the a and c axis lengths of the Bi2212 structure. Additionally, under high-pressure conditions, the Bi2212 phase maintained a relatively high structure stability.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Iztok Naglic, Blaz Leskovar, Zoran Samardzija, Bostjan Markoli
Summary: This study investigated the influence of gallium addition on the phases formed in Al-Mn alloys during casting, revealing that an increase in gallium content led to the formation of IQCs and DQCs in the alloys. Microanalysis showed that IQCs contained more gallium and less manganese compared to DQCs.
Article
Chemistry, Physical
Maxim Ozerov, Vitaly Sokolovsky, Sergey Nadezhdin, Ekaterina Zubareva, Nadezhda Zherebtsova, Nikita Stepanov, Lujun Huang, Sergey Zherebtsov
Summary: The TiZrNb metal-matrix composites reinforced by in-situ formed borides were produced using different amounts of TiB2. The composites exhibited varying microstructures and mechanical properties with the increase in boride content. Load transfer strengthening was found to be the main contributor to the overall strength of the composite. The biocompatibility evaluation suggested a decrease in the proliferation rate of mesenchymal stem cells with an increase in boride content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biochemistry & Molecular Biology
Elisabetta Esposito, Laura Calderan, Andrea Galvan, Enrica Cappellozza, Markus Drechsler, Paolo Mariani, Alessia Pepe, Maddalena Sguizzato, Enrico Vigato, Edoardo Dalla Pozza, Manuela Malatesta
Summary: This study investigated the transdermal fate of ethosomes and transethosomes on human skin. The results showed that the vesicle penetration capability was influenced by their physical-chemical features, with different vesicles reaching different levels of the skin. This offers potential for tailored transdermal drug delivery based on specific cutaneous pathologies.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Ceramics
Gaku Okuma, Fumihiro Wakai
Summary: Synchrotron X-ray multiscale tomography is a 3D imaging method combining microtomography and nanotomography for high-resolution measurement with a wide field of view. It can track the microstructural evolution in powder processing, sintering, and microfracture of ceramics, which is important for product quality and reliability. The complex subsurface crack system induced by Vickers indentation demonstrates the role of heterogeneous microstructures in controlling toughening mechanisms.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Damjan Vengust, Bostjan Jancar, Tilen Sever, Andreja Sestan, Vid Bobnar, Zdravko Kutnjak, Nina Daneu, Danilo Suvorov, Matjaz Spreitzer
Summary: A novel approach to synthesizing complex composite materials based on intergrowths of sodium and calcium cobaltates was presented in this work, resulting in samples with excellent thermoelectric performance and improved stability. The mixed Ca-Na composition developed textured microstructures composed of intergrowths of both end-members, with the composition x = 0.8 (Ca:Na = 2.75) showing long-term stability after exposure to high humidity.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Okkyun Seo, Jaemyung Kim, Jiayi Tang, L. S. R. Kumara, Koji Kimoto, Kazushi Miki, Akifumi Matsuda, Mamoru Yoshimoto, Osami Sakata
Summary: This research focuses on the influence of atomic arrangement on the electrical and catalytic properties of oxide thin films. The atomic arrangement of LiNiO2 thin films was investigated by uniaxial compression and annealing at 600℃ on sapphire substrates. Thin films with a rock-salt structure were grown using pulsed laser deposition method at room temperature. It was observed that the as-grown thin films transformed from a rock-salt to a layered structure after uniaxial compression at 600℃, and the layer thickness of the latter structure increased with increasing uniaxial compression pressure. Uniaxial compression provides a useful tool for oxide thin film research, contributing to the development of new functional oxide materials and adjustment of the atomic ordering of cation materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Soban Muddassir Dar, Yutao Zhao, Xizhou Kai, Zhuangzhuang Xu
Summary: This study investigated the microstructures, mechanical properties, and strain hardening properties of 1 vol% and 2 vol% (Al3Zr/Al2O3 + ZrB2) nanoparticles reinforced 6016Al matrix composites, which were synthesized through in-situ chemical reaction and solidified under squeezing pressure. It was found that Fe-B-rich and AlB2 phase particles were also formed in addition to the reinforcement particles. The matrix of the 1 vol%-6016Al composite exhibited fine Mg2Si precipitates under high squeezing pressure, while the matrix of the 2 vol%-6016Al composite did not show such precipitates. The squeezed 1 vol%-6016Al composite also had a greater reduction in grain size compared to the squeezed 2 vol%-6016Al composite. The squeezed 6016Al matrix composites exhibited high strength, high ductility, and lower strain hardening effect in the aged state, which was different from monolithic 6016Al alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Ceramics
S. Jublot-Leclerc, G. Bouhali, F. Pallier, A. Declemy
Summary: The study found that at low He concentrations, increasing implantation temperature led to enhanced point defect recombination at RT, resulting in lower strain. However, when He concentration exceeded a certain level, thermally activated mechanisms promoting the formation of He-V complexes overcame point defect recombination, leading to increased strain and damage accumulation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Jacob Obitso Nielsen, Flemming Bjerg Grumsen, Karen Pantleon
Summary: This study investigates the evolution of crystallite size and microstrain in ferrite in real time using energy-dispersive synchrotron diffraction, providing insights into the thermal stability and phase transformations of iron-carbon coatings.
MATERIALS CHARACTERIZATION
(2021)
Article
Food Science & Technology
Kotaro Matsui, Takamichi Kamigaki, Ryota Wakui, Yuri Nishino, Yoshiko Ito, Atsuo Miyazawa, Koichiro Yoshioka, Makoto Shiota
Summary: The physical properties of butter are influenced by its microstructure, and a novel observation method using AFM without pretreatment process was proposed in this study to observe the fat crystal structure. Measurements of milk fat-crystalline nanoplatelets were conducted using TEM and SAXS, revealing the thickness and structure of the fat crystals. Through this observation method, the relationship between the physical properties of butter and its fat crystal network can be discerned, benefiting the bread and confectionery industries in improving butter processing conditions.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Munmun Basak, Md Lutfor Rahman, Md Farid Ahmed, Bristy Biswas, Nahid Sharmin
Summary: Cobalt ferrite nanoparticles were synthesized using co-precipitation technique with different precipitating agents, affecting the structure and size distribution. Various analysis methods showed highly correlated results, with SSP method being the most compatible.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Meng Cao, Lei Li, Wen Bin Hong, Shu Ya Wu, Xiang Ming Chen
Summary: BaTiO3-epoxy dielectric composites prepared by partial sintering exhibit significantly enhanced permittivity and improved phase connectivity. Controlling the phase connectivity can achieve a good combination of temperature-stable high permittivity, low dielectric loss, and relatively low ceramic fraction.
JOURNAL OF MATERIOMICS
(2021)
Article
Engineering, Electrical & Electronic
Xuan Wang, Lei Li, Wen Bin Hong, Han Yan, Shu Ya Wu, Xiang Ming Chen
Summary: The research on the performance of BPO4 ceramics prepared by solid-state sintering and spark plasma sintering shows that increasing the sintering temperature leads to significant shrinkage and grain growth, but also causes serious sublimation and low relative density issues for BPO4. Sintering temperature has a significant impact on the microwave dielectric properties of the material, with SPS samples having higher relative density but lower Qf value, each with their own advantages and disadvantages.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Yi Han Ding, Lu Liu, Zi Jing Yang, Lei Li, Xiang Ming Chen
Summary: Hf1-xTixO2 dense ceramics were prepared using a standard solid-state reaction process, and their microwave dielectric properties were significantly improved with Ti substitution, especially achieving the best combination at x = 0.05. The sample with x = 0.55 had the smallest temperature coefficient of resonance frequency, providing potential competitiveness in future mobile communication technology due to excellent compatibility with Si.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Jun Zuo Shi, Xiao Li Zhu, Lei Li, Xiang Ming Chen
Summary: 4A and 13X zeolite ceramics were prepared by cold sintering processes, with key parameters including NaOH content, pressure, temperature, and holding time. The ceramics exhibited ordered microporous structure and high crystallinity, with potential applications in damping and thermal insulation materials, achieving high compressive strength and low Young's modulus.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Bing Liu, Ke Sha, Ying Qiang Jia, Yu Hui Huang, Cheng Chao Hu, Lei Li, Da Wei Wang, Di Zhou, Kai Xin Song
Summary: Cold sintering technique was used to pre-densify LiF ceramics, achieving high relative density and excellent microwave dielectric properties under high pressure conditions, providing a potential solution for applications in the field of microwave communication.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Meng Cao, Xiao Jian Yan, Lei Li, Shu Ya Wu, Xiang Ming Chen
Summary: This study demonstrates a strategy to overcome the challenge of obtaining a high dielectric constant in ceramic-polymer composites with low ceramic volume fraction. By using a high sintering temperature and introducing a porogen, the researchers were able to obtain BaTiO3 ceramics with high porosity and great connectivity. The composites prepared with these ceramics showed improved dielectric constants at low ceramic volume fractions. The composite with a sintering temperature of 1300 degrees C and a ceramic volume fraction of 38.1% exhibited a dielectric constant of 466.8, which was about nine times higher compared to the counterpart with a higher ceramic volume fraction of 60.8%. The composite also exhibited low dielectric loss and good frequency and temperature stability, indicating its potential for practical applications. Finite element simulation showed that the enhanced connectivity of BaTiO3 played a key role in the dielectric response of the composite.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Iqra Hameed, Lei Li, Xiao Qiang Liu, Xiang Ming Chen
Summary: (Mg1-xCax)(2)SiO4 dense ceramics were prepared and their microwave dielectric characteristics were investigated with Ca(2+) substitution reducing sintering temperature significantly. The ceramics exhibited an increase in dielectric constant with increased crystallite size, achieving ultra-high quality factor Qf value throughout the compositional range, and the best combination of microwave dielectric characteristics at x = 0.075.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Yi Han Ding, Lu Liu, Rui Ze Guo, Lei Li, Xiang Ming Chen
Summary: (Hf0.25Zr0.25Sn0.25Ti0.25)O-2 high-entropy ceramics were designed and prepared, and their microwave dielectric characteristics were studied. The research found that a prolonged sintering could significantly improve the Qf value of the ceramics, and the variation of microwave dielectric characteristics was closely related to the microstructure homogeneity of the material.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Ying Qiang Jia, Wen Bin Hong, Lei Li, Shu Ya Wu, Bing Liu, Xiang Ming Chen
Summary: In this study, dense LiF ceramics were prepared using room-temperature cold sintering. The increase in compacting pressure and relative density greatly improved the relative density, microstructural homogeneity, and microwave dielectric properties of the ceramics. This has significant implications for enhancing the performance and applications of the ceramics.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Shuang Yang, Ying Qiang Jia, Lei Li, Xiang Ming Chen
Summary: In this study, a series of (1 - y)MgTiO3-yCa(1-x)Sm(2x/3)TiO(3) composites with improved temperature stability were prepared by partially substituting Ca2+ in CaTiO3 with Sm3+. The results showed that with increasing Sm3+ content, the dielectric constant of the composites increased, and the nonlinearity of the change in resonant frequency with temperature and the rate of change of τ(f) with temperature decreased. This study is important for the development of temperature-stable microwave dielectric composites with constituent phases having opposite signs of τ(f).
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Ying Qiang Jia, Wei Kun Luo, Lei Li, Shu Ya Wu, Xiang Ming Chen
Summary: MSO4 (M = Ca, Sr, Ba) ceramics with different structures and microwave dielectric properties were studied. The characteristics of BaSO4 and SrSO4 having near-zero tau(f) make them potential candidates for low epsilon(r) microwave dielectric ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Xi Wang, Jun Zuo Shi, Xiao Li Zhu, Lei Li, Xiang Ming Chen
Summary: In this study, the effects of Ti-substitution for Hf on the microwave dielectric characteristics of CaHfO3 ceramics were investigated. It was found that Ti-substitution significantly improved the microwave dielectric characteristics due to changes in chemical bonds and enhanced rigidity of the octahedral structure. Additionally, it was observed that titanium-containing perovskite ceramics exhibited a consistent trend of tau(f) changing with tolerance factor, which is helpful for designing temperature-stable perovskite microwave dielectric ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Meng Cao, Wen Bin Hong, Xiao Dong Yang, Ying Qiang Jia, Lei Li, Shu Ya Wu, Hang Sheng Yang, Xiang Ming Chen
Summary: This study prepared dense and strong calcite ceramics by room-temperature cold sintering with the aid of water and high pressure. The dissolution-precipitation, plastic deformation, and pressure-solution-creep mechanisms played a crucial role in the densification and mechanical robustness of calcite ceramics. The as-prepared calcite ceramic showed promising application potential as a novel building and biomimetic material.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Meng Cao, Lei Li, Rui Ze Guo, Shu Ya Wu, Xiang Ming Chen
Summary: A new method was used to prepare Al-epoxy composites by compacting Al nanoparticles with self-passivated ultrathin Al2O3 shells, thus constructing ultrathin Al2O3 parallel-plate microcapacitors. This composite significantly improves the dielectric constant while maintaining low dielectric loss.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Chemistry, Physical
Lei Li, Xiao Li Zhu, Xiang Ming Chen
JOURNAL OF MATERIOMICS
(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)
