Article
Chemistry, Physical
Song Tang, Tongzheng Xin, Ting Luo, Fan Ji, Chuanqiang Li, Tao Feng, Si Lan
Summary: This study investigates the fracture behavior and underlying mechanisms of BCC Mg-Li-Al alloys. The narrow precipitation free zones, shearing of intragranular precipitates, and grain boundary precipitates are identified as the main factors contributing to grain boundary de-cohesion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Ming -Le You, Shuo-Min Li, Zhang-Zhi Shi
Summary: This paper develops a new type of aluminum alloy and improves its hardness through laser-aging surface treatment. The alloy exhibits high hardness and improved corrosion resistance. The study also establishes equations to evaluate the contributions of different hardening effects.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Jianyue Zhang, Guanyu Zhou, Bin Jiang, Alan Luo, Xuzhe Zhao, Aitao Tang, Fusheng Pan
Summary: The novel grain refinement method using a CaMgSn intermetallic phase was found to effectively reduce the average grain size in AZ31 magnesium alloy, improving microhardness and compressive yield strength. The added CaMgSn particles acted as heterogeneous nucleation sites in the grain interiors, contributing to the refinement of microstructure and mechanical properties of Mg-Al-based alloys.
Article
Nanoscience & Nanotechnology
Chuanlong Xu, Mingyi Zhang, Xiaobao Tian, Wentao Jiang, Qingyuan Wang, Haidong Fan
Summary: The interaction between Mg17Al12 precipitate and low-angle grain boundaries in Mg-Al alloys was investigated using molecular dynamics simulations. The precipitate was found to be sheared by grain boundaries with a rotation angle of 9 degrees or larger, but not sheared with a rotation angle smaller than 8 degrees. An analytical model based on Eshelby theory was proposed to explain this behavior, and it showed good agreement with the simulation results. The critical shear of the grain boundary was found to be related to the aspect ratio of the precipitate.
SCRIPTA MATERIALIA
(2023)
Article
Metallurgy & Metallurgical Engineering
Hengbin Liao, Meiyan Zhan, Chengbo Li, Zhiqiang Ma, Jun Du
Summary: In this study, MgAl2O4 powder was used as a nucleating substrate for alpha-Mg grain in Mg-Al alloys. The optimal conditions for achieving the smallest grain size and highest grain refining ratio in Mg-3Al alloy were found to be adding 2 wt.% MgAl2O4 powder. Crystallographic calculations confirmed the possible orientation relationships between alpha-Mg and MgAl2O4, supporting the role of MgAl2O4 particles as heterogeneous nucleation substrates.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Nanoscience & Nanotechnology
Ruixuan Li, Zheng Ren, Yuan Wu, Zhanbing He, Peter K. Liaw, Jingli Ren, Yong Zhang
Summary: Designing a quinary alloy based on the concept of high-entropy alloys enables the achievement of high strength and deformability at high zinc content levels in Al-based alloys. The precipitation transformation plays a key role in contributing to the desired mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiangpeng Gong, Shifang Luo, Shiyong Li, Cuilan Wu
Summary: The study investigated the effects of pre-deformation on the microstructure and mechanical properties of an Al-2.95Cu-1.55Li-0.57Mg-0.18Zr alloy. It was found that 5% pre-deformation significantly enhanced mechanical properties, but increasing the pre-deformation level to 15% did not further improve the mechanical properties despite continuous dislocation strengthening.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2021)
Article
Nanoscience & Nanotechnology
S. Y. Duan, L. K. Huang, S. H. Yang, Z. Zhou, S. J. Song, X. B. Yang, Y. Z. Chen, Y. J. Li, G. Liu, F. Liu
Summary: The addition of 0.5 wt% Li to an Al-Cu-Mg alloy results in significant strength increases without sacrificing ductility, mainly due to modified precipitation behavior. The strengthening sources in unstretched and stretched alloys are fundamentally different, with Li favoring a high density of GPB zones in unstretched alloys and refined S-phase precipitates in stretched alloys. These modified precipitates with Li enrichments elucidate the strengthening origin in Li-added Al-Cu-Mg alloys under various conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Coatings & Films
Xiaochun Ma, Siyuan Jin, Ruizhi Wu, Qing Ji, Legan Hou, Boris Krit, Sergey Betsofen
Summary: Adding alloying elements in Mg-Li alloys can refine grains, modify microstructure, enhance corrosion resistance and wear resistance. The growth process of microarc oxidation coatings is influenced by alloying elements and microstructure.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Zhen-zhen Liu, Jin-feng Li, Dan-yang Liu, Yun-long Ma, Yue Du, Yong-lai Chen, Xu-hu Zhang, Rajeev Kumar Gupta, Xiaobo Chen, Rui-feng Zhang
Summary: The study investigated the influence of different Mg concentrations on the mechanical properties and microstructure of an Al-Li alloy, showing that high Mg content can retard the precipitation of the T-1 phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Shilong Wei, Richu Wang, Hui Zhang, Chunting Xu, Ying Wu, Yan Feng
Summary: The Cu/Mg ratio affects the precipitation rate and mechanical properties of Al-Zn-Mg-Cu alloys, with alloys with lower Cu/Mg ratio exhibiting higher strength and slower coarsening rate. As the Cu/Mg ratio increases, the fracture mode changes from brittle to ductile, and alloys with higher Cu/Mg ratio have coarser and wider grain boundary precipitates.
JOURNAL OF MATERIALS SCIENCE
(2021)
Review
Materials Science, Multidisciplinary
Xiang Peng, Wen-Cai Liu, Guo-Hua Wu
Summary: Magnesium-lithium (Mg-Li) alloy, as the lightest metal structure material, has great market prospects. However, achieving a balance between superlightness and high strength, as well as improving high-temperature strength and stability remains challenging. Alloying, grain refinement, and compound strengthening are effective methods to enhance the mechanical properties of Mg-Li alloy.
Article
Materials Science, Multidisciplinary
J. D. Robson, A. D. Smith, J. Guo, J. M. Donoghue, A. E. Davis
Summary: Competitive continuous and discontinuous precipitation (CP and DP) in magnesium alloys have been studied in-situ for the first time. The migration of the high angle grain boundary (reaction front, RF) behind which DP occurs is found to be irregular instead of steady-state. Local effects play a key role in causing the irregular motion of the RF.
Article
Materials Science, Multidisciplinary
Mingjin Wu, Feifei Wu, Mengjun Long, Pengcheng Ye, Feng Jiang, Jingyu Jiang
Summary: This study investigates the microstructure evolution and fracture mechanism of the metal/ceramic interfacial region in Al-Mg-Sc alloy with micro-arc oxidation treatment.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Zhijun Zhang, N. C. Parson, W. J. Poole
Summary: The application of Al-Mg-Si alloys in fracture critical applications is increasing, and the formation of grain boundary precipitates plays an important role in controlling low energy intergranular fracture. The study shows that precipitates on high angle grain boundaries are approximately 3 times larger than those formed on low angle boundaries. The size of grain boundary precipitates decreases by a factor of 3 with increasing cooling rate, and almost no precipitates are observed at a cooling rate of 1000 degrees C/s. However, grain boundary precipitation is still observed during subsequent artificial ageing.
SCRIPTA MATERIALIA
(2022)
Review
Materials Science, Multidisciplinary
Sung Hwan Hong, Sang Chul Mun, Gyeol Chan Kang, Hae Jin Park, Yeon Beom Jeong, Gian Song, Ki Buem Kim
Summary: This study reviews the strategy of tailoring the intrinsic color characteristics of metallic materials, including single-phase solid-solution alloys and multiphase alloys with specific chromatic phases. Modulation of optical properties in chromatic alloys depends on the transition energy of the solid solution phase, which can be significantly influenced by additional alloying elements. Microstructural design based on multiphase forming alloy system effectively improves chromaticity of the alloys.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Jong Woo Choi, Jeong Tae Kim, Je Hyung Park, Sung Hwan Hong, Hae Jin Park, Taek Jib Choi, Ki Buem Kim
Summary: This study evaluated the microstructure and mechanical properties of as-cast non-equiatomic medium entropy alloys, showing that MEAs with 10% Cr content exhibited the highest yield strength and excellent plastic strain. Abnormal deformation behaviors, such as double-yielding phenomenon, were observed in the stress-strain curve, which was related to phase transformation during compressive loading as confirmed through TEM analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Mohammad Faisal, June-Hyung Kim, Young Whan Cho, Jae-il Jang, Jin-Yoo Suh, Jae-Hyeok Shim, Young-Su Lee
Summary: The addition of V in TiFe alloy affects the hydrogenation process by lowering the P-2/P-1 ratio. Ti46Fe47.5V6.5 alloy shows the best performance with approximately 1.5 wt.% of usable capacity within the target pressure range. Ce addition solves the issue of difficulty in activation at room temperature in TiFe-based alloys.
Article
Materials Science, Multidisciplinary
Hae Jin Park, Hee Jin Lee, Tae Kyung Kim, Sung Hwan Hong, Wei-Min Wang, Taek Jib Choi, Ki Buem Kim
Summary: This study focuses on the design and synthesis of tunable metallic glass for functional applications. The unique properties of the Ti-Cu-Ni-Sn metallic glass, determined by the varying oxygen affinities of the constituent elements, enable the homogeneous nucleation and uniform formation of metal oxides. The alloy design and hydrothermal synthesis play a crucial role in determining the characteristics of the metal oxides and the resulting nanostructures and photoelectrode properties. These findings provide a promising roadmap for the application of metallic glasses in photoelectrochemical solar water splitting and other potential areas.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Min-Gu Jo, Jin-Yoo Suh, Myung-Yeon Kim, Han-Jin Kim, Woo-Sang Jung, Dong-Ik Kim, Heung Nam Han
Summary: The high temperature tensile and creep properties of FCC high-entropy alloys CrMnFeCoNi and CrFeCoNi were evaluated. It was found that there was no remarkable difference in the tensile behavior between the two alloys, but the creep rupture life of the CrFeCoNi alloy was significantly longer. This could be attributed to the enhanced solid solution strengthening and stronger grain boundary of the CrFeCoNi alloy, which led to the reduced formation of deleterious sigma phase.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Han-Jin Kim, Min-Kyung Cho, Gyeungho Kim, Seung-Yong Lee, Min-Gu Jo, Hayoung Kim, Jin-Yoo Suh, Joonho Lee
Summary: This study quantitatively evaluated the hydrogen-induced variation of stacking fault energy (SFE) of a CrMnFeCoNi high-entropy alloy (HEA) using transmission electron microscopy (TEM) with weak-beam dark-field (WBDF) technique. It was observed that the width of Shockley partial dislocations increased after hydrogen absorption, indicating a decrease in SFE of the alloy. This is the first direct observation of stacking faults under the influence of hydrogen in a face-centered cubic metallic structure.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Sung Hwan Hong, Hae Jin Park, Gyeol Chan Kang, Young Seok Kim, Gian Song, Ki Buem Kim
Summary: The designed AB intermetallic compound type high-entropy metallic glass precursor shows high thermal stability and polymorphic crystallization behavior, leading to the formation of nanocrystalline single-phase high-entropy alloy. The nucleation and growth rates for crystallization strongly depend on the annealing temperature. This discovery provides an effective way to develop nanocrystalline single-phase high-entropy alloys by designing intermetallic compound type high-entropy metallic glass precursors.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Dong-Hyun Lee, Zhe Gao, Jeong-Min Park, Yakai Zhao, Jin-Yoo Suh, Eric A. Jagle, Koichi Tsuchiya, Upadrasta Ramamurty, Jae-il Jang
Summary: The significant strengthening of SLM 304L stainless steel after high-pressure torsion treatment is mainly attributed to the synergistic combination of grain refinement and martensitic transformation. In the nanocrystalline regime, the dominance of grain boundary-mediated plasticity retards martensite-induced hardening.
SCRIPTA MATERIALIA
(2022)
Article
Green & Sustainable Science & Technology
GyeolChan Kang, SangChul Mun, Hae Jin Park, Sung Hwan Hong, SeYoung Oh, Kyo Chul Lee, Ki Buem Kim
Summary: This study focuses on addressing both environmental and consumer demand issues through recycling metal waste materials and developing ecofriendly metal materials that do not use paint or resin.
JOURNAL OF SUSTAINABLE METALLURGY
(2022)
Article
Nanoscience & Nanotechnology
Dae Cheol Yang, Sang Yoon Song, Han-Jin Kim, Sang-In Lee, Biswanath Dutta, Young Kyun Kim, Jae-Hyeok Shim, Jin-Yoo Suh, Young Sang Na, Seok Su Sohn
Summary: The issue of hydrogen embrittlement (HE) is significant for storing and transporting hydrogen, but there is limited understanding of how the unique properties of multi-principal element alloys affect HE mechanisms. In this study, the reduction rate of ductility by hydrogen uptake was measured for VCrCoNi alloys with analogous grain sizes. The results showed that the alloy with an intermediate ratio of V and Cr exhibited the highest resistance to HE due to its favorable grain boundary characteristics, including large fractions of special boundaries and special triple junctions, and large twin-related domain size.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Tae Jin Jang, You Na Lee, Yuji Ikeda, Fritz Koermann, Ju-Hyun Baek, Hyeon-Seok Do, Yeon Taek Choi, Hojun Gwon, Jin-Yoo Suh, Hyoung Seop Kim, Byeong-Joo Lee, Alireza Zargaran, Seok Su Sohn
Summary: Complex concentrated alloys (CCAs) with a face-centered-cubic (FCC) structure can improve both strength and ductility by adding the refractory element Mo to the alloy, resulting in enhanced solid-solution strengthening and reduced stacking fault energy (SFE).
Article
Chemistry, Physical
Taejun Ha, Vivek Shukla, Taewook Na, Young Whan Cho, Jin-Yoo Suh, Jae-Hyeok Shim, Young -Su Lee
Summary: This study reports the development of a two-stage metal hydride hydrogen compressor capable of compressing hydrogen from 1 to 30 MPa through a temperature change. The selected alloys were successfully used in a laboratory-scale compressor, and the compression capacity was analyzed to estimate the usable capacity of the materials. The results of this study can guide the design and evaluation of multistage MHHCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Ziqi Song, Zhaoxuan Wang, Qi Chen, Zhigang Qi, Ki Buem Kim, Weimin Wang
Summary: The effect of Cr element on the corrosion behavior of Fe-based alloys was investigated. The results showed that the addition of Cr could improve the glass formability and corrosion resistance of the alloys, while the excessive CrFeB phase could deteriorate the properties of passive film.
Article
Chemistry, Physical
Taejun Ha, June-Hyung Kim, Changhyo Sun, Dong-Ik Kim, Jin-Yoo Suh, Jae-il Jang, Joonho Lee, Yunseok Kim, Jae-Hyeok Shim
Summary: The effect of Ce addition on the initial hydrogen absorption behavior and microstructural features of AB-type Ti50Fe48V2 hydrogen storage alloys was investigated. Ce addition significantly improved the initial hydrogen absorption kinetics at room temperature, with no significant influence on the pressure-composition isotherms. Fine spherical particles containing Ce were dispersed in the TiFe matrix, and these particles were determined to be gamma-Ce mixed with cerium oxide. Ce particles played a crucial role by providing starting points for initial hydrogenation, explaining the significant increase in primary hydrogen absorption kinetics after Ce addition.
Article
Materials Science, Multidisciplinary
Tae Jin Jang, Ju-Hyun Baek, Jin-Yoo Suh, Alireza Zargaran, Seok Su Sohn
Summary: The pursuit of a superior combination of strength and ductility in metallic materials for structural applications has long been a challenge. Recently, L12 (g') precipitation-strengthened high-entropy alloys (HEAs) that undergo direct aging from cold-rolled states have exhibited exceptional strength-ductility synergy. However, the origins of this synergetic effect in direct aging are still a subject of controversy. Herein, we aim to unravel the fundamental factors contributing to the improved mechanical properties of directly aged HEAs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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)
