Article
Metallurgy & Metallurgical Engineering
Tao Lai, Ji-lin Xu, Qi-fei Xiao, Yun-xiang Tong, Jun Huang, Jian-ping Zhang, Jun-ming Luo, Yong Liu
Summary: The study found that as the sintering temperature increases, the porosities of porous NiTi alloys gradually decrease while the compressive strength first increases and then decreases; an increase in Mg content leads to higher porosities and lower compressive strength of porous NiTi alloys; porous NiTi alloys prepared with Mg space holder exhibit superior properties compared to those prepared with NH4HCO3 space holder, showing improved compressive strength, superelasticity, shape memory effect, and damping capacity.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Chemistry, Physical
Zhiqiang He, Ze Wang, Dezhi Wang, Xinli Liu, Bohua Duan
Summary: Porous NiTi alloys were successfully manufactured through the integration of gel-casting and microwave sintering techniques. The study demonstrated that increasing the sintering temperature resulted in a decrease in porosity and mean pore diameter, while increasing the content of the NiTi phase, the elastic modulus, and compressive strength of the sintered samples. Porous NiTi alloys with desirable properties were obtained when the gel body with 50 vol.% solid loading was microwave sintered at 1000 degrees C for 30 min.
Article
Materials Science, Multidisciplinary
E. Nigito, F. Diemer, S. Husson, S. F. Ou, M. H. Tsai, F. Rezai-Aria
Summary: This study investigates the microstructure of NiTi-SLM, revealing the formation of fine random grains and columnar dendritic grains in a micro-mold. It suggests that SLM processing resembles Metallic Self Micro-Mold Casting and/or Self Micro-Molding.
Article
Chemistry, Physical
Ze Wang, Zhiqiang He, Bohua Duan, Xinli Liu, Dezhi Wang
Summary: This paper investigates the process characteristics and properties of porous NiTi alloys prepared by non-aqueous gel-casting. The results show that the viscosity and stability of the slurry increase with the increase of solid loading, and the slurry exhibits better process characteristics within the solid loading range of 40-52 vol.%. Additionally, the porosity and average pore diameter of the sintered NiTi alloys decrease while the compressive strength increases with a rise in the solid loading. Porous NiTi alloys with suitable properties for cortical bone implantation were successfully fabricated by gel-casting, and the pore structure and mechanical properties can be adjusted by controlling the solid loading.
Article
Engineering, Mechanical
Zhihao Zhao, Dongjie Jiang, Yao Xiao, Jianping Lin, Junying Min
Summary: The superelasticity of nanocrystalline NiTi alloys originates from stress-induced martensitic transformation, which may exhibit strain localization. Measuring the intrinsic response during the reverse transformation is difficult, hindering analysis of localized phase transformation phenomena. This study proposes a novel experimental methodology to extract the complete intrinsic response of SMAs and applies it to nanocrystalline superelastic NiTi, providing insights into the deformation mechanisms and paving the way for accurate analysis and design of relevant structures.
EXTREME MECHANICS LETTERS
(2023)
Article
Engineering, Manufacturing
Jia-Ning Zhu, Zhaoying Ding, Evgenii Borisov, Xiyu Yao, Johannes C. Brouwer, Anatoly Popovich, Marcel Hermans, Vera Popovich
Summary: Through spark plasma sintering (SPS) method, directional cracks in [001] textured L-PBF NiTi shape memory alloy were successfully repaired, resulting in improved mechanical properties and superelasticity, addressing the limitations of hot cracking.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Materials Science, Multidisciplinary
Pradeep Singh, Vikas Shrivastava, I. B. Singh, D. P. Mondal
Summary: The research on three groups of porous Ti4Al4Co samples revealed significant microstructural transformations due to powder milling and different sintering atmospheres, which in turn affected the mechanical and corrosion properties of the alloy. Sample S-1 showed the highest compressive strength and lowest corrosion current density among the three samples.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Physics, Applied
Bingfei Liu, Yuyang Wang, Wenping Wu
Summary: This study utilizes molecular dynamics simulation to investigate the phase transformation behavior of porous nanocrystalline NiTi shape memory alloys under cyclic deformation. The results show that an increase in porosity and number of cycles leads to a decrease in critical phase transformation stress and peak stress, while increasing residual martensite, phase boundary, and interstitial atoms. Additionally, the martensitic transformation occurs earlier with an increasing number of cycles, and the dissipated energy decreases. The potential energy during the austenite elastic unloading stage transitions from a decreasing to an increasing trend due to the presence of residual martensite increasing with the number of cycles.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
A. Safdel, A. Zarei-Hanzaki, H. R. Abedi, S. Pourbabak, D. Schryvers, R. Basu
Summary: Two different cold working and annealing schemes were used in this study to assess the asymmetric superelastic response of thermomechanically processed materials through cyclic tensile and compressive modes of deformation. The development of specific deformation and recrystallization texture components, as well as the evolved substructure during thermomechanical processing, were identified as important factors contributing to the intensified asymmetry. The presence of fine grains and dense dislocation substructure hindered the movement of the transformation front, ultimately limiting the range of transformation and degrading the superelastic response of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ruonan Qin, Fengchun Jiang, Mengxin Cao, Yanchun Li, Hexin Zhang, Chunhuan Guo, Zhenqiang Wang
Summary: NiTi alloy hollow spheres were prepared via powder metallurgy at different sintering temperatures. The spheres obtained at 1200 degrees Celsius showed good surface quality, reduced thin-wall porosity, increased thin-wall thickness uniformity, and enhanced compressive strength. The number of pores decreased during sintering, with larger pores becoming spherical.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Hung Do Phuoc, Phu Nguyen Hoang, Sam Yang, Darren Fraser, Vu Thua Nguyen
Summary: This study investigated the ability of bone ingrowth into 3D-printed porous titanium alloy implants and evaluated the consistency of radiology information between CBCT and mu CT. The results demonstrated the potential of fully porous titanium alloy implants for bone defect reconstruction and the promising use of CBCT for assessing bone ingrowth into porous implants.
Review
Materials Science, Multidisciplinary
Woo-Chul Kim, Ka-Ram Lim, Won-Tae Kim, Eun-Soo Park, Do-Hyang Kim
Summary: A new concept has been introduced for an alloy with both glass forming ability and shape memory characteristics, which can enhance the physical properties of shape memory alloys by suppressing the formation of brittle intermetallic compounds and enabling the formation of nanocrystalline structure. The glass precursor is not only suitable for small-sized devices but also allows for production of intricate geometry through thermoplastic forming, with shape memory effect or superelasticity manifested after crystallization. The study reviews typical NiTi-based SMAs and multicomponent SMAs fabricated using glass precursor, discussing the effects of quaternary doping and the properties of multicomponent SMA systems.
PROGRESS IN MATERIALS SCIENCE
(2021)
Review
Materials Science, Multidisciplinary
Woo-Chul Kim, Ka-Ram Lim, Won-Tae Kim, Eun-Soo Park, Do-Hyang Kim
Summary: This paper introduces a new alloy concept based on NiTi alloys, with both glass forming ability and shape memory characteristics. By suppressing the formation of brittle intermetallic compounds, the physical properties of shape memory alloys fabricated using glass precursor can be maximized. The structure and properties of multicomponent SMA systems are also discussed.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Xiebin Wang, Xiayang Yao, Dominique Schryvers, Bert Verlinden, Guilong Wang, Guoqun Zhao, Jan Van Humbeeck, Sergey Kustov
Summary: This work reports anomalous phenomena in superelastic cycling of NiTi shape memory alloys near the temperature border, including higher critical stress, plateau stress changes, and transition from good superelasticity to fully irreversible strain, which may be caused by defects generated during the first superelastic cycle near the border impeding stress-induced martensitic transformations.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Carlo Alberto Biffi, Jacopo Fiocchi, Francesca Sisto, Chiara Bregoli, Ausonio Tuissi
Summary: A superelastic NiTi alloy with enhanced antibacterial properties was successfully fabricated using Laser Powder Bed Fusion (LPBF) process. The fully dense samples were printed by premixing NiTi and Zn powders. The alloying of Zn (2% wt.) onto the surface of the NiTi samples during fabrication promoted a promising antibacterial response against Staphylococcus aureus, while maintaining the superelastic recovery of the NiTi alloy.
Article
Metallurgy & Metallurgical Engineering
Jian Wang, Lingzhong Meng, Zhang Zhang, Baisheng Sa, Xiaoxiao Fu, Liyuan Sheng, Daokui Xu, Yufeng Zheng
Summary: A new ternary compound, Mg11-xZnxSr, in the Mg-Zn-Sr system was analyzed using SEM, EDS, XRD, and TEM. The crystallized phase belonged to the tetragonal I41/amd space group and had the Cd11Ba prototype, with Mg atoms doping into the Zn11Sr crystal lattice. The Rietveld refinement and computational results showed a decrease in lattice parameters with decreasing Mg concentration and an increase in elastic constants with higher Zn content in Mg11-xZnxSr compounds.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Multidisciplinary
Siyu Wang, Yuqian Qiao, Xiangmei Liu, Shengli Zhu, Yufeng Zheng, Hui Jiang, Yu Zhang, Jie Shen, Zhaoyang Li, Yanqin Liang, Zhenduo Cui, Paul K. Chu, Shuilin Wu
Summary: This study demonstrates the improved thermoelectric performance of Bi2Te3 nanosheets grown on reduced graphene oxides (rGO) through the formation of heterointerfaces. The phonon scattering effect and extra carrier transport channels induced by the rGO-Bi2Te3 heterointerface lead to an enhanced power factor value and reduced thermal conductivity. Furthermore, the photo-thermoelectric catalysis of rGO-Bi2Te3 significantly increases the yield of reactive oxygen species. This study provides new insights into heterointerface design in photo-thermoelectric catalysis.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Congyang Mao, Wanyu Jin, Yiming Xiang, Yizhou Zhu, Jun Wu, Xiangmei Liu, Shuilin Wu, Yufeng Zheng, Kenneth M. C. Cheung, Kelvin Wai Kwok Yeung
Summary: Confering catalytic defects in sonosensitizers is crucial for enhancing sonodynamic therapy. In this study, 2D catalytic planar defects were designed within Ti3C2 sheets to overcome this challenge. These planar slip dislocations with abundant Ti3+ species can activate O-2, resulting in a significant amount of O-1(2) generation and a high bactericidal capability under ultrasound stimulation. It was found that the 2D catalytic planar defects can intervene in electron transfer through the phonon drag effect, leading to a dramatic decrease in O-2 activation energy.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jianfang Li, Xiangmei Liu, Yufeng Zheng, Zhenduo Cui, Hui Jiang, Zhaoyang Li, Shengli Zhu, Shuilin Wu
Summary: A rapid and effective therapeutic strategy for treating osteomyelitis is reported, utilizing ferroelectric polarization interfacial engineering of BiFeO3/MXene (Ti3C2) triggered by ultrasound. The ferroelectric polarization induced by ultrasound leads to the formation of a piezoelectric field, and the sonoluminescence effect stimulates BiFeO3/Ti3C2 to produce photogenerated carriers. With the synergistic action of the polarization electric field and Schottky junction, the separation of electrons and holes is accelerated, improving the utilization of polarized charges and photogenerated charges, and enhancing the yield of reactive oxygen species. This approach efficiently kills Staphylococcus aureus in a short time with the assistance of ultrasonic heating.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Zhenxing Yang, Cuihong Chen, Bo Li, Yufeng Zheng, Xiangmei Liu, Jie Shen, Yu Zhang, Shuilin Wu
Summary: By constructing a core-shell interface electric field and enhancing oxygen adsorption ability, MoS2@PBMOF can generate high temperature and abundant ROS under light irradiation to kill bacteria, while promoting the healing of damaged tissues.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Biomedical
Dandan Xia, Yu Qin, Hui Guo, Peng Wen, Hong Lin, Maximilian Voshage, Johannes Henrich Schleifenbaum, Yan Cheng, Yufeng Zheng
Summary: This study fabricated pure Zn porous scaffolds with diamond structures using customized laser powder bed fusion technology. The results showed that these scaffolds have excellent mechanical properties, corrosion behavior, and biocompatibility, and promote osteogenesis, making them a promising solution for treating large bone defects.
BIOACTIVE MATERIALS
(2023)
Article
Chemistry, Physical
Wenchan Sun, Chaofeng Wang, Danya Wan, Yufeng Zheng, Shuilin Wu, Jie Shen, Yu Zhang, Xiangmei Liu
Summary: CuCeOx material is applied to treat infectious bacterial osteomyelitis using microwave irradiation. The material generates heat and reactive oxygen species, increasing the thermal sensitivity and permeability of bacterial membranes. Copper ions penetrate the bacterial membrane, react with H2O2, and produce a toxic hydroxyl group, leading to bacterial death. This method effectively treats Staphylococcus aureus-induced osteomyelitis and provides a safe and effective solution for deep tissue infections.
Article
Chemistry, Physical
Hu Wei, Yue Luo, Chaofeng Wang, Shuilin Wu, Yufeng Zheng, Yu Zhang, Jie Shen, Xiangmei Liu
Summary: A Bi2S3/FeS2 heterojunction derived from a metal-organic framework is synthesized and the materials-microorganism interface is constructed. Through interfacial electron transfer, the bacterial electron transport chain is disrupted, inhibiting the metabolic activity of the bacteria. The BFS also exhibits enzyme-like properties and can produce reactive oxygen species to kill additional bacteria. In vitro and in vivo experiments demonstrate the high antibacterial efficiency and wound healing promoting effect of BFS. This work highlights the potential of BFS as a novel nanomaterial for the treatment of bacterial infections through the construction of materials-microorganism interface.
Review
Engineering, Biomedical
Xiehui Chen, Rong Chang, Hongtao Liu, Le Zhang, Yufeng Zheng
Summary: In contrast to polymer bioresorbable stents (BRS) that showed poor performance in clinical trials due to weak mechanical properties, metallic BRS with improved mechanical strength have been successful in clinical use. Magnesium and iron based biodegradable metal stents have been clinically used, while zinc based stents have been tested in Mini-Pigs. This mini-review paper demonstrates the current technology levels and discusses future research and development directions of metallic BRS, including improving structural thickness and supporting strength, absorption and elimination of degradation products, enhancing mechanical stability, creep resistance and biocompatibility, and exploring new materials and multifunctional stents.
BIOACTIVE MATERIALS
(2023)
Article
Engineering, Biomedical
Dong Bian, Xiao Chu, Jin Xiao, Zhipei Tong, He Huang, Qinggong Jia, Jianing Liu, Wenting Li, Hui Yu, Yue He, Limin Ma, Xiaolan Wang, Mei Li, Tao Yang, Wenhan Huang, Chi Zhang, Mengyu Yao, Yu Zhang, Zhigang Xu, Shaokang Guan, Yufeng Zheng
Summary: This study focuses on the simplicity and performance of single-phased Mg-RE alloys for biomedical purposes. The use of high-solubility rare earth elements allows for the achievement of a homogeneous single-phased microstructure, resulting in good corrosion resistance and mechanical properties. Compared to clinically-proven Mg-based implants, these alloys exhibit similar in-vitro and in-vivo performances, with gradual excretion of metal elements and less burden on main organs.
BIOACTIVE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Liguo Jin, Xiangmei Liu, Yufeng Zheng, Yu Zhang, Zhaoyang Li, Shengli Zhu, Hui Jiang, Zhenduo Cui, Shuilin Wu
Summary: This study presents a highly effective microwave therapeutic strategy for chronic osteomyelitis (COM), by utilizing the generation of reactive oxygen species (ROS) and heat. The underlying mechanism was determined through density functional theory (DFT) and MW vector network analysis, which demonstrated the formation of a high-energy local electric field and enhanced charge accumulation.
Article
Pharmacology & Pharmacy
Lihua Wu, Yue Luo, Hu Wei, Shuilin Wu, Yufeng Zheng, Zhaoyang Li, Zhenduo Cui, Yanqin Liang, Shengli Zhu, Jie Shen, Xiangmei Liu
Summary: A novel metal-organic framework material, Bi-TCPP, was synthesized by a convenient one-step hydrothermal method. Bi-TCPP exhibits ultrafast singlet oxygen generation ability and a high photothermal conversion efficiency. It also demonstrates excellent antibacterial and repair effects, suggesting its potential application in the field of biomedicine.
ADVANCED THERAPEUTICS
(2023)
Article
Materials Science, Biomaterials
Bo Huang, Wei Guan, Chaofeng Wang, Shuilin Wu, Zhenduo Cui, Yufeng Zheng, Zhaoyang Li, Shengli Zhu, Hui Jiang, Paul K. Chu, Xiangmei Liu
Summary: In this study, a homo-heterostructured S-Cu-FC/CuS/GO@CMC hydrogel was constructed for the first time through an in situ ionic complexation reaction. The hydrogel exhibited enhanced photocatalytic performance under 808 nm near-infrared light irradiation. The interface between S-Cu-FC/CuS and graphene oxide (GO) facilitated the fast transfer of photogenerated charges, leading to the robust sterilization ability of the hydrogel.
BIOMATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jinzhi Ren, Yuqian Qiao, Liguo Jin, Congyang Mao, Chaofeng Wang, Shuilin Wu, Yufeng Zheng, Zhaoyang Li, Zhenduo Cui, Hui Jiang, Shengli Zhu, Xiangmei Liu
Summary: This study successfully fabricated Cu/C/Fe3O4-COOH nanorod composites with nanoscale tip convex structures as a smart bacteria-capture-killing vector for the treatment of osteomyelitis caused by deep tissue infections. The composites showed excellent magnetic targeting and bacteria-capturing ability and effectively treated Staphylococcus aureus-infected osteomyelitis through the synergistic effects of microwave thermal therapy, microwave dynamic therapy, and copper ion therapy under microwave irradiation.
Article
Materials Science, Multidisciplinary
Zhiying Wang, Jianfang Li, Yuqian Qiao, Xiangmei Liu, Yufeng Zheng, Zhaoyang Li, Jie Shen, Yu Zhang, Shengli Zhu, Hui Jiang, Yanqin Liang, Zhenduo Cui, Paul K. Chu, Shuilin Wu
Summary: In this study, an antibacterial nanofiber membrane with enhanced photocatalytic activity is fabricated using a ferroelectric polarization strategy. The membrane exhibits excellent visible light absorption and photothermal conversion performance, and is capable of killing Staphylococcus aureus and Escherichia coli.
ADVANCED FIBER MATERIALS
(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)
