Article
Nanoscience & Nanotechnology
Tao Liang, Lianghua Xiong, Hongbo Lou, Fujun Lan, Junran Zhang, Ye Liu, Dongsheng Li, Qiaoshi Zeng, Zhidan Zeng
Summary: The mechanical properties of hexagonal silicon (Si-IV) were experimentally studied, revealing that Si-IV has similar elastic modulus and hardness to the common diamond cubic silicon. This similarity enables the integration of Si-IV into conventional Si-based devices and its potential for photovoltaic and optoelectronic applications.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Analytical
Dong-Hyeon Kim, Michael A. Schweitz, Sang-Mo Koo
Summary: Annealing Ni/AlN/SiC heterojunction devices in an atmosphere of nitrogen and oxygen significantly improves the electrical properties of the structures, increasing the on/off ratio and decreasing the ideality factor. X-ray photoelectron spectroscopy provides direct indication of the bonding structure of the AlN layer.
Article
Engineering, Electrical & Electronic
Kosuke Muraoka, Seiji Ishikawa, Hiroshi Sezaki, Maeda Tomonori, Satoshi Yasuno, Tomoyuki Koganezawa, Shin-Ichiro Kuroki
Summary: The thickness of SiO2/BaOx layers affects the structural and interfacial properties of layered gate dielectric on 4H-SiC. Deposition of SiO2 layer on BaOx layer alters the stoichiometry and distribution of Ba-silicate in the gate dielectric. Increase in BaOx thickness leads to a transition from amorphous to poly-crystalline crystal structure.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Rahmandhika Firdauzha Hary Hernandha, Bharath Umesh, Purna Chandra Rath, Le Thi Thu Trang, Ju-Chao Wei, Yu-Chun Chuang, Ju Li, Jeng-Kuei Chang
Summary: The lithiation/delithiation properties of alpha-Si3N4 and beta-Si3N4 are compared and the carbon coating effects are examined. Then, beta-Si3N4 at various fractions is used as the secondary phase in a Si anode to modify the electrode properties. The incorporated beta-Si3N4 decreases the crystal size of Si and introduces a new N-Si-O species at the beta-Si3N4/Si interface.
Article
Chemistry, Physical
Khalid Mujasam Batoo, Ritesh Verma, Ankush Chauhan, Rajesh Kumar, Muhammad Hadi, Omar M. Aldossary, Y. Al-Douri
Summary: This study reported the synthesis of Gd and Nb co-doped BT ceramic oxides and investigated their structural and electrical properties. Various analysis techniques were used to characterize the samples, revealing the influence of Gd and Nb doping on the electrical properties of the ceramic materials, which were found to improve with increasing dopant concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Takaaki Koyanagi, David J. Sprouster, Lance L. Snead, Yutai Katoh
Summary: High-energy x-ray diffraction was used to investigate the irradiation-induced creep behavior of silicon carbide (SiC), revealing that stress-induced stacking disorder plays a key role in creep mechanism in neutron-irradiated SiC.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Shynar Kultayeva, Young-Wook Kim, In-Hyuck Song
Summary: The study investigated the effects of BN content in porous SiC ceramics on their electrical, thermal, and mechanical properties in N2 and Ar atmospheres. It was found that the electrical resistivity was mainly controlled by the sintering atmosphere, while the thermal conductivity and flexural strength were more influenced by porosity and necking area changes between SiC grains.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Guandong Liang, Guoxun Sun, Jianqiang Bi, Weili Wang, Xiangning Yang, Yonghan Li
Summary: Uniformly dispersed boron nitride nanosheets (BNNSs) reinforced silicon nitride (Si3N4) composites were prepared using surface modification assisted flocculation combined with SPS sintering, which significantly improved the mechanical properties of the composites. Adding amino-modified boron nitride nanosheets (NH2-BNNSs) can greatly enhance the fracture toughness and bending strength of the composite materials compared to monolithic Si3N4.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Haoqian Zhang, Qiang Liu, Biao Zhang, Jian Ye, Yicheng Jin, Zhaoxin Zhong, Yang Wang, Hao Liu, Feng Ye
Summary: The study shows that the designed microstructures have a significant impact on the mechanical properties of porous Si3N4 ceramics, but a less obvious effect on the dielectric properties. The dielectric constant can be reliably designed based on the porosity, and the mechanical properties can be optimized through microstructure.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Najah Rhimi, N. Dhahri, M. Khelifi, E. K. Hlil, J. Dhahri
Summary: This work focuses on studying the properties of sodium bismuth titanate (NBT) ceramic, including its structure, optical properties, and electrical properties. The material exhibited a poly-crystalline structure with a rhombohedral shape, and a grain size of 29.17 μm. The dielectric loss and dielectric constant increased with frequency, and the conduction mechanism followed the correlated barrier hopping (CBH) and small polaron hopping (SPH) models. The study provides valuable insights into the physical characteristics of NBT and its potential applications in the industry.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
K. P. Valdez, H. A. Castillo, J. H. Quintero-Orozco, E. Restrepo-Parra, Wencel de la Cruz
Summary: This paper studies the mechanical properties of TaNx/TaCx bilayers obtained by direct current magnetron sputtering. By varying the deposition temperature and the number of bilayers, the best mechanical properties were found to be with a sample grown at 500 degrees C and 40 bilayers. Hardness was related to the equilibrium between preferential orientation and the competition between surface free energy and strain energy.
Article
Materials Science, Ceramics
Zheng Sun, Wenxu Liu, Qiuyang Li, Zhi Tao, Yemei Han
Summary: Introducing Bi(Zn2/3Nb1/3)O-3 successfully improved the dielectric performance of (1-x) BZT20-xBZN composite ceramics, with sample 0.94BZT20-0.06BZN exhibiting enhanced dielectric constants and a higher degree of relaxor behavior (γ=1.91).
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Prachi Chaudhary, Rishabh Shukla, Samiksha Dabas, O. P. Thakur
Summary: This study investigates the effects of Nb substitution on the properties of a multiferroic solid solution, revealing significantly enhanced magnetic and dielectric properties in Nb-substituted samples, making them suitable for memory device applications. Additionally, changes in the structure and the coupling between electric and magnetic dipoles were confirmed through various analytical techniques.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Xia Fang, Senchuan Jiang, Limei Pan, Shuang Yin, Tai Qiu, Jian Yang, Xiaoyun Li
Summary: In this study, beta-SiC is used as an attenuating agent in beta-SiC/AlN microwave attenuating composites and found to slow AlN grain growth and generate SiC-AlN solid solution during sintering, resulting in enhanced electrical and dielectric properties. Adjusting the content of beta-SiC significantly improves the microwave absorption performance of the composites, with absorption performance being tunable for samples with 25-40 vol% beta-SiC content in terms of optimal absorption frequency and thickness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
N. Suresh Kumar, R. Padma Suvarna, K. Chandra Babu Naidu, Prajna P. Mohapatra, Pamu Dobbidi
Summary: The La1-xBixTiO3 (x = 0.2, 0.4, 0.6 & 0.8) (LBTO) nanoparticles were successfully synthesized via hydrothermal method. The diffraction analysis confirmed their polycrystalline nature, while the microstructure revealed the presence of nanorods and asymmetrical stones like nanoparticles. Raman spectra showed the characteristic vibration bands of titanium/bismuth/lanthanum metals and oxygen. The study on electromagnetic properties revealed that the samples with x = 0.2 and 0.6 exhibited negative magnetic loss values, suggesting their potential application as microwave absorbers.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Yupeng Xie, Ailian Zhu, Min Chen, Keyou Shi, Qiucai Zhang, Guowen Peng, Yong Liu
Summary: Considerable amounts of coal fly ash (CFA) are produced annually without proper utilization. Alkali-activated CFA was introduced to prepare ceramics to treat neodymium-contaminated soil, and its effect on the properties of the ceramics was investigated. The alkali activation of CFA led to a desilication reaction and the generation of new phases rich in sodium, enhancing the mechanical properties of the ceramics. The alkali-activated CFA exhibited higher bulk density and homogeneous distribution of Nd ions in the matrix compared to untreated CFA.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Industrial
Litong Zhang, Yu Guo, Weiwei Qian, Weili Wang, Daoyuan Liu, Sai Liu
Summary: This paper proposes a modelling and online training method for digital twin workshop to address the difficulties in modelling, simulation, and verification. It describes a multi-level digital twin aggregate modelling method and a digital twin organization system. A spatio-temporal data model is constructed based on the data demand for digital twin aggregates. The paper also presents a training method using truncated normal distribution and a verification method based on real-virtual error for digital twin models. The effectiveness of real-time status monitoring, online model training, and production simulation is verified through a case study.
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2023)
Article
Materials Science, Ceramics
Shenghao Li, Fang Ye, Laifei Cheng, Zhaochen Li, Junheng Wang, Jianyong Tu
Summary: In this study, porous silicon carbide ceramics with multilevel directional pores were prepared using chemical vapor infiltration (CVI) combined with sacrificial template method. A carbon fiber preform with a specific structure was used as a template, and silicon carbide was deposited through the CVI process. The carbon fiber template was then oxidized and removed, resulting in the porous silicon carbide ceramics. The influence of deposition time on pore structure, mechanical properties, and thermal properties was investigated. Compared to the traditional pore-making process, the sacrificial template method produces more regular pores, leading to excellent mechanical and thermal insulation properties. The sample deposited for 72 hours exhibited a porosity of 66.00%, a flexural strength of 67.52 MPa, and a thermal conductivity below 1 W/(m center dot K) from room temperature to 1200 degrees C.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Jinsong Yang, Fang Ye, Laifei Cheng
Summary: Nano-porous titanium carbide (TiC) coating was synthesized in-situ on silicon carbide (SiC) fiber substrate using titanium tetrachloride (TiCl4) vapor. The coating consisted of TiC nanograins and the nanopores were formed by lateral stack growth. The composition and morphology of the coating were controlled by the supersaturation of gaseous reagents at the boundary layer. The flexibility of the SiC fiber was preserved by the optimized TiC coating. Lastly, a SiCf/SiC mini-composite with nano-porous TiC interphase was prepared, exhibiting fiber pull-out and interphase fracture on the fracture surface.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Li Yao, Shixiang Zhou, Longkai Pan, Hui Mei, Yang Li, Konstantinos G. Dassios, Paolo Colombo, Laifei Cheng, Litong Zhang
Summary: This study achieves the fabrication of all-ceramic metamaterial microwave blackbodies, demonstrating broadband microwave absorption capability, temperature insensitivity, and structural scalability. It also exhibits additional properties of noise reduction and high wear resistance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Manufacturing
Changhui Niu, Qing Zhang, Laifei Cheng, Fang Ye, Litong Zhang
Summary: This study proposes and verifies a simple and cost-effective method to prepare Cf/SiC composites with dispersed C-SiC interphase. The dispersed C-SiC interphase is formed by the diffusion of SiC precursor molecules into the porous carbon coating derived from the decomposition of the sizing agent. The study has a positive application value for the manufacture of composites in terms of significantly reducing the preparation cost and cycle duration.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Xiangyun Gao, Bao Lei, Yi Zhang, Daxu Zhang, Chong Wei, Laifei Cheng, Litong Zhang, Xuqin Li, Hao Ding
Summary: In this study, CT technology and deep learning methods were used to investigate the microstructural features and damage characteristics of SiC/SiC composites, including accurate identification of features such as fibers, interphase, matrix, and cracks, as well as obtaining key characteristics such as porosity, fiber pull-out length distribution, and crack distribution.
MATERIALS CHARACTERIZATION
(2023)
Review
Engineering, Mechanical
Bai-chao Wang, Cong-zhi Liu, Li-tong Zhang, Da-sen Wang
Summary: This paper presents a new multi-object tracking method that improves tracking performance in cluttered environments through multiple fusions. The method uses Bayesian estimation theory and introduces multiple measurement models to enhance estimation reliability.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Materials Science, Coatings & Films
Jingchao Ma, Sijie Kou, Yujie Ma, Xu Ma, Chenghua Luan, Juanli Deng, Shangwu Fan, Chidong Liu, Laifei Cheng
Summary: C/C-ZrC-SiC composites with La-doped ZrC-SiC-ZrSi2 coatings containing different La contents were prepared. The ablation behaviors of the composites under oxyacetylene flame were studied, and the effects of La2O3 addition on the microstructure and phase composition evolution were investigated. The results showed that the composites with 15 wt% La2O3 exhibited better ablation resistance due to the formation of a dense oxide layer consisting of m-ZrO2, t-ZrO2, and Zr0.9La0.1O1.95 phases.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yucong Wei, Fang Ye, Laifei Cheng, Litong Zhang, Jinsong Yang
Summary: Unidirectional SiCf/SiC composites with excellent mechanical properties were successfully fabricated by a modified PIP method. The composites had a unique microstructure with alternating carbon and SiC layers, which ensured the synergy of high strength and toughness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Xin Li, Xiaomeng Fan, Wenjie Zhu, Xiaoke Lu, Jianyong Tu, Jiangyi He, Jimei Xue, Fang Ye, Yongsheng Liu, Laifei Cheng
Summary: SiO2 interface was introduced into SiCnws/BSAS ceramic to enhance high-temperature electromagnetic absorption. By changing the SiO2 content, the interface structure was tailored, leading to increased polarization loss. The optimized SiCnws/SiO2-BSAS ceramic demonstrated enhanced electromagnetic absorption at 873 K with an effective absorption bandwidth of 4.1 GHz. The electromagnetic absorption mechanism was analyzed from the perspectives of electron transport and space charges. This heterointerface design strategy offers a new method for developing high-temperature electromagnetic absorption materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nuclear Science & Technology
Jie Wang, Qiuyu Sun, Jinshan Gao, Yupeng Xie, Qingyu Si, Xiaoqing Liang, Ji Liu, Dingkang Hu, Pengyu Huang, Sheng Wang, Guoming Liu, Aijun Mi
Summary: Lead is commonly used for X/gamma ray shielding and dosage reduction, but improper recycling can lead to serious hazards. On the other hand, recycling lead from high metal content gamma-ray shielding materials can serve as a secondary metal source and contribute to regulated accumulation and environmental protection. This study focuses on the recovery of lead from waste flexible Vinyl-Methyl-Silicone based gamma-ray shielding materials, with analysis of the effects of pyrolysis temperature and heating rate. Optimum conditions resulted in a lead recovery rate of 57.40 wt% at a pyrolysis temperature of 300°C for 15 minutes, producing a solid product consisting mainly of lead and lead oxides.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Weiwei Qian, Yu Guo, Hao Zhang, Shaohua Huang, Litong Zhang, Hailang Zhou, Weiguang Fang, Shanshan Zha
Summary: This article focuses on how to effectively construct DTM synchronous update methods based on dynamic sample data for discrete manufacturing workshop, in order to enhance the accuracy of PP prediction. The proposed model demonstrates good performance in realizing the synchronization of workshop performance in industrial environment, greatly improving the prediction ability for PP.
ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING
(2023)
Article
Chemistry, Physical
Minggang Zhang, Longkai Pan, Zhipeng Jin, Xiao Wang, Hui Mei, Laifei Cheng, Litong Zhang
Summary: Independent photo-charging technologies based on aqueous zinc-ion batteries (ZIBs) show promise for renewable energy systems. However, the conflict between light utilization and electrochemical performance limits the effectiveness of photo-charging ZIBs. This study proposes and applies 3D light-trapping structures (LTSs) in a rigid VO2/C@SiCuOC electrode to improve light-harvesting efficiency. The optimized 3D electrode demonstrates significantly enhanced photo-response current density and higher energy density, making it a practical solution for clean energy harvest/storage systems.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Analytical
Xiaofeng Xu, Laifei Cheng, Xiaojiao Zhao, Jing Wang, Ke Tong, Hua Lv
Summary: The preparation of micro/nano periodic surface structures using femtosecond laser machining technology has been a hot topic in recent years. In this study, the formation and evolution of micro/nano periodic ripples on 2205 stainless steel were investigated. Different types of ripples were generated through single spot irradiation with fixed laser fluences and various pulse numbers. The morphologies of the ripples were analyzed and the underlying mechanisms were discussed. It was found that the presence of nano holes/pits played a crucial role in the formation and evolution of the ripples. Additionally, a new microstructure called the pea pod-like structure was discovered, and it provided a possible explanation for the formation and evolution of the micro/nano periodic ripples.
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)
