Article
Chemistry, Physical
Haoyang Zhao, Pei Wang, Jinxu Li
Summary: Increasing vanadium content improves the resistance to hydrogen embrittlement in bolt steels, with vanadium precipitates acting as reversible hydrogen traps that inhibit hydrogen-dislocation interactions. Lower dislocation density and finer martensitic structure also contribute to hindering hydrogen-induced cracking.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Ning Zhao, Qiangqiang Zhao, Yanlin He, Rendong Liu, Weisen Zheng, Wenyue Liu, Yu Zhang
Summary: Two cost-saving marine steels with 1000 MPa yield strength were investigated for hydrogen embrittlement behavior using electrochemical technique. The hydrogen embrittlement resistance of steel B was found to be superior to steel A, potentially due to the presence of more nano-sized NbC particles. Additionally, the interface between carbide and matrix played a significant role in hydrogen trapping.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Cheng Zhang, Huihui Zhi, Stoichko Antonov, Huaibin Wang, Hao Wang, Yanjing Su
Summary: The effect of hydrogen on the mechanical properties of twinning-induced plasticity austenitic steel was studied using strain rate tests and microscopy. A new method for evaluating hydrogen embrittlement in materials with low hydrogen diffusion coefficient was proposed. The findings suggest that evaluating the contribution of the brittle zone to overall mechanical properties provides a more realistic and universal characterization of the influence of hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
K. E. Nygren, A. Nagao, S. Wang, P. Sofronis, I. M. Robertson
Summary: Internal hydrogen has a significant effect on the fatigue lifetime of SUS316L stainless steel, but a minimal impact on the tensile properties. The influence of hydrogen on the microstructural state and deformation twins results in non-linear changes in fatigue lifetime with increasing hydrogen concentration.
Article
Materials Science, Multidisciplinary
Masoud Moshtaghi, Mahdieh Safyari
Summary: The joint effect of temperature and strain rate on hydrogen embrittlement properties of martensitic steel was investigated. It was found that at 50 °C, the elongation loss initially increased and then decreased with decreasing strain rate. This study provides the first report that at low strain rates, the temperature can mitigate hydrogen embrittlement susceptibility by increasing hydrogen effusion to the material surface and releasing a significant amount of hydrogen before the yield point. At 25 °C, the elongation loss increased with decreasing strain rate, as hydrogen could interact with mobile dislocations at lower strain rates, eventually leading to hydrogen-induced fracture. Additionally, intergranular cracks were observed, which can be attributed to prior austenite grain boundaries acting as paths for hydrogen-induced cracking.
Article
Materials Science, Multidisciplinary
K. M. Bertsch, A. Nagao, B. Rankouhi, B. Kuehl, D. J. Thoma
Summary: The study examined the hydrogen embrittlement resistance of austenitic stainless steel parts manufactured using powder-bed-fed selective laser melting (SLM) and directed energy deposition (DED). The influence of hierarchical AM microstructures on mechanical response, microstructural evolution, and void formation was analyzed using multiscale electron microscopy. The presence of hydrogen affected ductility in DED materials, but had minimal impact on SLM or heat-treated materials, with microstructural features driving these different responses discussed.
Article
Materials Science, Multidisciplinary
Yu Tian, Hao Yu, Tao Zhou, Kun Wang, Zimeng Zhu
Summary: This study reveals the precipitation behavior and morphological characteristics of MX precipitates in deformed Ti-V-Nb multi-microalloyed steels, introducing the L parameter model for evaluating the shape of precipitates. The evolution rules of precipitate morphology provide insights for developing high-performance microalloyed steels.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Kazuho Okada, Akinobu Shibata, Taisuke Sasaki, Hisashi Matsumiya, Kazuhiro Hono, Nobuhiro Tsuji
Summary: This study aimed to improve the resistance against hydrogen embrittlement by increasing the concentration of carbon segregated at prior austenite grain boundary (PAGB), XPAGB, in low-carbon martensitic steels. The specimens with and without carbon segregation treatment (Non-seg and Seg specimens, respectively) had similar microstructures, except for higher XPAGB in the Seg specimen. The Seg specimen exhibited higher maximum stress and smaller fraction of intergranular fracture surface under hydrogen-charged conditions, indicating that segregated carbon suppressed hydrogen accumulation and increased cohesive energy of PAGB.
SCRIPTA MATERIALIA
(2023)
Article
Metallurgy & Metallurgical Engineering
Shunsuke Taniguchi, Miyuri Kameya, Yukiko Kobayashi, Kazuma Ito, Shingo Yamasaki
Summary: The hydrogen trapping behavior of Mo and V carbides in tempered martensitic steels was investigated. Mo carbides were found to play a dominant role in hydrogen trapping in Mo added steel, while V carbides showed limited effect on hydrogen trapping in V added steel. The interface area and carbon vacancy fraction of B1-type alloy carbides were found to have a positive correlation with the hydrogen content, suggesting that the carbon vacancies at the interface of B1-type carbides are the main trapping sites for hydrogen in tempered steels.
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN
(2023)
Article
Nanoscience & Nanotechnology
L. Tan, J. D. Poplawsky, Y. Yang
Summary: Detailed investigations of two ferritic-martensitic steels, Nb-steel and Ta-steel, show that the higher Nb diffusivity and lower nucleation driving force of Nb-carbide promotes preferential nucleation of Nb-carbides at grain boundaries, resulting in a higher boundary occupancy compared to Ta-carbides. This higher boundary occupancy contributes to greater creep resistance in Nb-steel compared to Ta-steel, despite similar yield strengths.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
L. Cupertino Malheiros, A. Oudriss, S. Cohendoz, J. Bouhattate, F. Th, M. Piette, X. Feaugas
Summary: Electrochemical permeation cell built on a Instron tensile testing machine allows fracturing notched specimens under hydrogen flux while monitoring simultaneously the flow stress and the permeation anodic current. The analysis of fracture surfaces reveals that cracking initiates at the hydrogen-entry surfaces as quasi-cleavage regions followed by ductile propagation. The finite element method (FEM) calculates local failure criteria, revealing the importance of hydrogen-mechanical-structural interactions in fracture analysis.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Alexandra Fedoseeva, Ivan Nikitin, Evgeniy Tkachev, Roman Mishnev, Nadezhda Dudova, Rustam Kaibyshev
Summary: The study on P92-type steels with different chemical compositions showed that an increase in B and Cr contents affects the precipitation of M23C6 carbides, while (W+Mo) content influences the diffusion growth and coarsening of Laves phase. The addition of Re to 10%Cr steel can reduce the coarsening rate of Laves phase.
Article
Chemistry, Physical
Tuhin Das, Rohan Chakrabarty, Jun Song, Stephen Yue
Summary: This study utilizes a two-fold approach to investigate hydrogen diffusion characteristics in martensitic steels, examining the role of different traps and microstructures on H diffusion. The findings suggest that high angle boundaries have greater influence at low H concentrations, while dislocations have a more pronounced impact at high H concentrations, and the importance of packet boundaries in moderating H diffusion is highlighted.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yuji Momotani, Akinobu Shibata, Nobuhiro Tsuji
Summary: The present study investigated hydrogen-related fractures in low-carbon martensitic steel at different deformation temperatures. The sensitivity to hydrogen embrittlement increased with decreasing temperature from 100 degrees C to 0 degrees C, but decreased further below 0 degrees C. The characterization of fracture surface types revealed a similar temperature dependence of hydrogen-embrittled surfaces to the sensitivity to hydrogen embrittlement. Qualitative discussion indicated that the degree of hydrogen accumulation peaked in the medium temperature range, consistent with the experimentally confirmed sensitivity to hydrogen embrittlement.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
M. Pinson, H. Springer, K. Verbeken, T. Depover
Summary: The addition of 2% aluminium to a martensitic Fe-0.4C steel forms a ferritic microfilm, enhancing ductility without affecting bulk hardness. The presence of aluminium delays hydrogen-induced fractures and redirects crack propagation, resulting in intergranular fracture surfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Shaoyang Shen, Liuzhang Ouyang, Jiangwen Liu, Hui Wang, Xu-Sheng Yang, Min Zhu
Summary: A one-step high-energy ball milling process is used to in situ form ultrafine Ni nanoparticles and combine them with expanded graphite to synthesize a MgH2Ni-EG nanocomposite. The nanocomposite exhibits excellent hydrogen storage performance at both high and room temperatures.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Wanting Sun, Jiasi Luo, Yim Ying Chan, J. H. Luan, Xu-Sheng Yang
Summary: In this study, a laser surface remelting technique was used to fabricate a heterogeneous gradient nanostructured layer on an austenitic Hadfield manganese steel. The layer exhibited a gradient refinement process and had a core-shell structure with ultra-strong mechanical properties due to the extra work hardening ability induced by the strength-ductility synergy in the gradient nanostructure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ziquan Li, Jinquan Wen, Yuqing Cai, Fengting Lv, Xu Zeng, Qian Liu, Titus Masese, Chuanxiang Zhang, Xusheng Yang, Yanwen Ma, Haijiao Zhang, Zhen-Dong Huang
Summary: A new Bi-Ti-EG compound is reported as a high-capacity and stable anode material for potassium storage. It possesses a long-range disordered layered framework that can facilitate electrolyte ingress into Bi nanoparticles, thereby enhancing the storage capacity and cycling stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
De-Xin Zhu, Kun-Ming Pan, Yuan Wu, Xiao-Ye Zhou, Xiang-Yue Li, Yong-Peng Ren, Sai-Ru Shi, Hua Yu, Shi-Zhong Wei, Hong-Hui Wu, Xu-Sheng Yang
Summary: In this study, the dominant factors influencing the bulk modulus of intermetallic compounds were identified as B-cal, dB(avg), and TIE. Surrogate machine learning models using these features achieved a 95% accuracy in predicting bulk modulus. Symbolic regression provided an expression for the relationship between bulk modulus and the screened features. These findings offer a new approach for optimizing and predicting the bulk moduli of intermetallic compounds.
Article
Metallurgy & Metallurgical Engineering
Rongjian Shi, Yanqi Tu, Liang Yang, Saiyu Liu, Shani Yang, Kewei Gao, Xu-Sheng Yang, Xiaolu Pang
Summary: This study explored the influence of pre-strain and microstructures on the hydrogen trapping behaviors in 1-GPa high-strength martensitic steel. The results showed that the trapped reversible and trapped irreversible hydrogen contents significantly increased after a pre-strain of 5%. The microstructural evolution revealed that the presence of concomitant dislocation cell-twin duplex microstructure and tangled dislocations contributed to the enhanced hydrogen trapping.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yongyang Zhu, Shaoyang Shen, Xu-Sheng Yang, Liming Zeng, Gary Tsui, Zheng-Long Xu, Qing Zhou, Renheng Tang, K. C. Chan
Summary: This study proposes a cost-effective method to regenerate LiBH4 by ball milling hydrous lithium metaborate with low-cost Mg-based alloys. The introduction of light rare-earth metals into Mg improves the regeneration kinetics of LiBH4 by facilitating the breakage of B-O and conversion of H+ into H-. A yield of 40% can be achieved for LiBO2 center dot 2H(2)O-CeMg12 system with a relatively short ball milling duration of 10 hours. The optimized regeneration of LiBH4 is believed to be efficient and economical, utilizing an intrinsic hydrogen source in LiBO2 center dot 2H(2)O and cheap reducing agents. This finding is expected to promote the widespread use of LiBH4 for hydrogen storage.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Xinping Mao
Summary: The austenite to ferrite phase transformation is a crucial structural change in steel production, with the ferrite morphology and grain size significantly impacting the mechanical properties of steel materials. This study investigates the effects of cooling rate, prior austenite grain size (PAGS), and Mn content on the microstructure evolution of the austenite-to-polygonal ferrite phase transformation using a multi-phase-field model. The findings reveal that higher cooling rates enhance the driving force for the phase transformation and delay the process. Decreasing PAGS increases the proportion of austenite grain boundaries, providing more nucleation sites for polygonal ferrite and resulting in refined grain size. Furthermore, increased Mn content leads to significant grain refinement by reducing the transformation temperature. This work provides valuable insights for adjusting and designing desired microstructures of polygonal ferrite to enhance the mechanical performance of steel.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Yuqing Cai, Wenjing Liu, Fangfei Chang, Su Jin, Xusheng Yang, Chuanxiang Zhang, Ling Bai, Titus Masese, Ziquan Li, Zhen-Dong Huang
Summary: In this study, Ni, Fe, Mg, and Ti elements were introduced into Mn-based layered oxide to design a high-entropy compound HE-KMO, which demonstrated exceptional rate capability and cyclic stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ling Wang, Dongxuan Li, Yawen Huang, Ruiqi Mao, Boqing Zhang, Fengxiong Luo, Peiyang Gu, Ping Song, Xiang Ge, Jian Lu, Xusheng Yang, Yujiang Fan, Xingdong Zhang, Kefeng Wang
Summary: In this study, enhanced in situ mineralization through the combination of enzymatic and anion-boosted mineralization is applied, resulting in improved mineralization efficiency, mineral content, and mechanical properties. The mechanism of mineralization enhancement is investigated through computational calculations and in vitro mineralization experiments. The strategy is shown to have potential applications in cranial bone repair.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Environmental Sciences
Jiahui Zhao, Lin Cao, Xiao Wang, Haoling Huo, Huaijun Lin, Qiwei Wang, Xusheng Yang, Florian Vogel, Wei Li, Zhidan Lin, Peng Zhang
Summary: Metal organic frameworks (MOFs) have great potential in improving the performance of water treatment membranes. In this study, novel nanoparticles based on both nanoporous MOFs and organic PDA layer were used as dopants for PES ultrafiltration membranes. The resulting membranes showed enhanced permeability and anti-fouling properties, and demonstrated promising applications in oily sewage remediation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Coatings & Films
Haoling Huo, Lin Cao, Jie Li, Huaijun Lin, Qiwei Wang, Xusheng Yang, Chuanjun Zang, Jingtao Zhang, Peng Zhang, Wei Li
Summary: In this study, modified coatings with PEEK and nanoparticles were utilized to enhance the strength and wear resistance. The addition of tantalum carbide nanoparticles showed the greatest improvement in mechanical behavior and wear resistance. The modified coatings have the potential to reduce stress on the titanium implant substrate and extend the lifespan of total knee replacement implants.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Chaolei Zhang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Xinping Mao
Summary: In this study, the austenitic-pearlite transformation and its effects on microstructure evolution were investigated using a CALPHAD-based model. The results showed that the isothermal transformation temperature, cooling rate, and Mn content significantly influenced the pearlite transformation process, and the multi-component diffusion played a critical role in pearlite growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Dexin Zhu, Kunming Pan, Hong-Hui Wu, Yuan Wu, Jie Xiong, Xu-Sheng Yang, Yongpeng Ren, Hua Yu, Shizhong Wei, Turab Lookman
Summary: This study investigates the intrinsic factors influencing the ductile-to-brittle transition temperatures (DBTT) of Fe-Al intermetallic compounds and develops machine learning strategies for accurate prediction of DBTT. By utilizing selected features, surrogate models achieve a high accuracy of 95% and a functional expression capturing the relationship between DBTT and features is derived through symbolic regression.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Yanyu Chen, Jie Li, Yingfei Yang, Junjie Yang, Huaijun Lin, Qiwei Wang, Xusheng Yang, Yuying Meng, Wei Li, Zhidan Lin, Peng Zhang
Summary: A novel porous polymer was prepared using the Pickering high internal phase emulsion (HIPE) template method for efficient oil-water separation from sewage. The addition of OTS-modified carbon nanotubes and surfactants improved the stability, mechanical properties, and separation efficiency of the polyHIPE. The 1%OTS-CNT polyHIPE exhibited high oil absorption capacity and maintained absorption efficiency even after multiple reapplications. Furthermore, the polymer showed superior antibacterial properties against E. coli and S. aureus.
Article
Engineering, Environmental
Yongyang Zhu, Xubo Li, Xu-Sheng Yang, Pengyun Chen, Gary Chi-Pong Tsui, Zheng-Long Xu, Renheng Tang, Fangming Xiao, Kangcheung Chan
Summary: Researchers have developed a low-cost BCC solid solution alloy with excellent activation performance and high effective hydrogen desorption capacity by using a new compositionally complex doping strategy. The synergistic effect of Nb, Fe, Co, Ni, and Mn elements has been confirmed to improve hydrogen storage performance.
CHEMICAL ENGINEERING JOURNAL
(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)
