Article
Automation & Control Systems
Mohammad Afrasiab, Yousef Hojjat, Ghader FarajinAff, Hassan Moslemi Naeini
Summary: The study focused on investigating the effect of high strain rates on the formability of ultrafine-grained sheets produced by the ARB process. It was found that while the hardness and mechanical strength of the ARBed sheets increased significantly after multiple passes, their formability decreased notably. However, after high strain rate processing, the formability of the sheets improved by 102% to 113% compared to the quasi-static condition.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Qing-lin Du, Chang Li, Xiao-hui Cui, Charlie Kong, Hai-liang Yu
Summary: Ultrafine-grained AA1060 sheets were fabricated via five-cycle accumulative roll bonding (ARB) and subsequent three-pass cold rolling or cryorolling, leading to further grain refinement. Lower rolling temperatures resulted in finer grain sizes, with cryorolled sheets exhibiting higher strength and ductility compared to cold-rolled sheets.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
H. Parvin, M. Kazeminezhad
Summary: The strength evolution of metal matrix composite during processing/cycling via accumulative roll bonding (ARB) is analyzed using a twofold model. The evolution consists of monolithic-like behavior and composite-like behavior, with each behavior making a different contribution. Particle effectiveness is lowest at the beginning of the cycling process and reaches its highest value during the later cycles. The onset of declining monolithic-like behavior is observed at a critical strain, and there is a minimum strain at which composite-like behavior dominates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Majid Naseri, Mohsen Reihanian, Ahmad Ostovari Moghaddam, Davood Gholami, Seyedmehdi Hosseini, Mohammad Alvand, Ehsan Borhani, Evgeny Trofimov
Summary: In this study, a strategy was proposed to achieve microstructural refinement and outstanding strength-ductility synergy in Al/Brass composites through cross accumulative roll bonding (CARB). The CARB processed composite exhibited higher tensile strength and elongation compared to the ARB processed specimen, along with unique crystallographic texture features.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
M. Naseri, E. Borhani, O. Imantalab, M. Shokouhimehr, A. Fattah-alhosseini
Summary: This study provides insights into the relationship between crystallographic texture and electrochemical behavior of nano/ultrafine-grained AA2024 alloy. The results indicate that grain refinement increases the corrosion current density and decreases the passive film resistance of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
S. Karami, B. Piroozi, E. Borhani
Summary: In this study, the fatigue and cyclic deformation behavior of ultrafine-grained pure aluminum AA1100 product by accumulative roll bonding (ARB) process under stress-controlled in the presence of mean stress were investigated. The tensile properties of the material were improved due to grain refinement caused by severe strain imposed during seven cycles of the ARB process. The fatigue life was found to depend greatly on the ARB cycle, showing an increase with the increasing cycle. TEM observations revealed the microstructural evolution induced by fatigue, with dense dislocation patterns recovering and transforming during cyclic deformation.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yongpeng Tang, Toshiki Fujii, Shoichi Hirosawa, Kenji Matsuda, Daisuke Terada, Zenji Horita
Summary: This study demonstrates that the tensile strength and ductility of A1050 commercial-purity aluminum can be improved using the processes of accumulative roll bonding and high-pressure sliding. The increase in strength is attributed to significant grain refinement and well-defined grain boundaries.
MATERIALS TRANSACTIONS
(2023)
Article
Nanoscience & Nanotechnology
Dhyai Hassan Jawad, Ali Hosseinzadeh, Guney Guven Yapici
Summary: The study investigated the influence of layer architecture on the mechanical properties of IF steel/Al composites, revealing that composites with aluminum as the outer layer exhibited the highest fatigue life due to crack branching at the interface region. Additionally, under cyclic loading, cracks originating from the interface layers led to failure, in addition to the significant impact of surface cracks on the outer layers.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Mehran Tamjidi Eskandar, Ali Parvizi, Davood Rahmatabadi, Ramin Hashemi
Summary: The study found that Al/Cu composites produced by the asymmetric accumulative roll bonding process exhibit significantly higher mechanical properties compared to individual aluminum and copper. As the roller diameter ratio (R-d) increases, the bond strength and hardness of the Al/Cu interface improve due to enhanced plastic deformation rate and surface expansion. However, the hardness along the thickness was found to be very heterogeneous due to the uneven distribution of strain and strain hardening.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Saeed Sadeghpour, Mahesh C. Somani, Jukka Komi, L. Pentti Karjalainen
Summary: A new combination of factors is employed to enhance the stabilization of austenite in a medium Mn steel, resulting in a refined multi-component microstructure. The microstructure evolution and phase fraction during processing are systematically investigated, revealing a combination of phases including martensite, pearlite, retained austenite, and carbide precipitates. By optimizing annealing parameters, an ultrafine-grained microstructure is achieved with equiaxed ferrite, retained austenite, and some fresh martensite.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Yingming Tu, Xuefeng Liu, Wenjing Wang, Weiliang Zhang, Qihang Feng
Summary: Cu-Ti alloys prepared by the ARB-DD process exhibit improved mechanical strength and electrical conductivity after deformation-aging treatment, which is attributed to the formation of multi-scale substructures and the increased Cu4Ti particles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Hyogeon Kim, Hyesu Ha, Jungsub Lee, Sujung Son, Hyoung Seop Kim, Hyokyung Sung, Jae Bok Seol, Jung Gi Kim
Summary: High-pressure torsion processing induces significant mechanical property enhancement and complex microstructural changes in aluminum 7075 alloys, including grain refinement, solute migration, and strength enhancement through precipitation hardening and dissolution of brittle phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
M. Naseri, M. Alvand, D. Gholami, E. Borhani, H. Abdollah-Pour, S. Fakhravar
Summary: Nano/ultrafine-grained structures were produced in AA2024 alloy sheets using accumulative roll bonding (ARB) followed by friction stir welding (FSW). The FSW process caused localized heat generation and resulted in divergent grain structures in different regions of the weld nugget. The texture components in the stir zone were Cube {001}<100>, S {123}<634>, B {112}<110>, C {001}<110>, and copper {112}<111>. Grain growth phenomena, softening, and microhardness reduction were also observed.
MRS COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Zohreh Sarvi, Alireza Sadeghi, Mahmoud Mosavi Mashhadi
Summary: The effect of temperature on microstructures, second phases, and preferred crystallographic orientations of Al/Mg laminated metallic composites was studied. Non-equilibrium intermetallic phases were formed at the Al/Mg interface. The thickness of the intermetallic layer increased with consecutive passes and higher process temperature. Annealing shifted the composition towards thermodynamically stable phases. XRD results showed deviation from expected crystallographic orientation in the Al layer and alignment with the rolling force direction in the Mg layer. The most uniform and crack-free structure was formed at 450℃.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Omar Alejandro Velazquez-Carrillo, Francisco Alfredo Garcia-Pastor
Summary: Accumulative roll bonding (ARB) is an SPD technique widely used to enhance mechanical properties in metals, especially precipitation hardened alloys like aluminum 7075. Materials processed by ARB, such as Al-7075, show significant improvements in yield and ultimate strength, with thermal stability of the microstructure being a key consideration for high-strength applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Metallurgy & Metallurgical Engineering
Masoud Shoushtarian Mofrad, Ehsan Borhani, Mohammad Yousefieh, Hamed Aminian
Summary: In this study, nano-sized Titania particles were coated on an aluminum matrix using the atmosphere spraying method, and an Al-TiO2 nanocomposite was fabricated by the accumulative roll bonding (ARB) process. The results showed that the amount of TiO2 nanoparticles decreased while the amount of Al increased during the ARB process, and the thickness of TiO2 particle clusters decreased with an increase in the number of ARB cycles. The study also demonstrated that the pressure of rolling had a significant effect on reducing surface roughness during the seven cycles of the ARB process.
CANADIAN METALLURGICAL QUARTERLY
(2023)
Article
Materials Science, Multidisciplinary
Ahad Rezaee, Mostafa Ketabchi, Seyed Amir Arsalan Shams, Hamid Reza Jafarian, Chong Soo Lee
Summary: This study investigates the microstructure and mechanical behavior of a non-equiatomic high-entropy alloy during cold rolling. The results show that no phase transformation occurs during cold rolling, and plastic deformation follows the dislocation slip mechanism at the early stages. Mechanical twinning and shear band formation are identified as the main plastic deformation mechanisms at higher levels of cold rolling.
METALS AND MATERIALS INTERNATIONAL
(2023)
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
Materials Science, Multidisciplinary
Reza Gholizadeh, Shuhei Yoshida, Yu Bai, Shu Kurokawa, Akinobu Shibata, Nobuhiro Tsuji
Summary: In this study, the deformation behavior of the CoCrFeMnNi alloy under ultra-high strains at various temperatures was investigated. It was found that deformation twinning was extensively activated at moderate to high strains and at elevated temperatures above 600 degrees C. The alloy showed excellent deformability at low temperatures, but embrittlement occurred at intermediate temperatures. This research provides insights into the microstructure evolution and mechanical response of the Cantor alloy under shear deformation at a wide range of strains and temperatures.
Article
Materials Science, Multidisciplinary
Wu Gong, Stefanus Harjo, Yo Tomota, Satoshi Morooka, Takuro Kawasaki, Akinobu Shibata, Nobuhiro Tsuji
Summary: The martensitic transformation is accompanied by the generation of internal stresses at both microscale and macroscale during cooling. Previous studies using X-ray or neutron diffraction have reported inconsistent results due to the influence of factors such as solute elements and crystal defects on the measured lattice parameter.
Article
Materials Science, Multidisciplinary
Akinobu Shibata, Goro Miyamoto, Shigekazu Morito, Akiko Nakamura, Taku Moronaga, Houichi Kitano, Ivan Gutierrez-Urrutia, Toru Hara, Kaneaki Tsuzaki
Summary: In this study, the substructures and crystallographic features of as-quenched lath martensite in interstitial-free (IF) steel and low-carbon steel (0.2C steel) were analyzed using advanced microscopy techniques. The study revealed differences in the morphology and habit plane orientation between the two types of steel. Dislocation structures, cementite formation, and carbon segregations were observed, indicating significant changes in the substructure during quenching. Based on the experimental results, the researchers discussed the origin of the substructures and crystallographic features of lath martensite.
Article
Engineering, Civil
Abhishek Ghosh, Kalyan Das, Ali Reza Eivani, Hossein Mohammadi, Hossein Vafaeenezhad, Uttam Kumar Murmu, Hamid Reza Jafarian, Manojit Ghosh
Summary: Equal channel angular pressing (ECAP) is used to refine the grain structure and improve the mechanical properties of metals and alloys. This study investigates the deformation behavior of EN AW 7075 alloy during ECAP using both experimental and simulation methods. The results show that an outer corner angle (OCA) of 20 degrees and 30 degrees leads to the highest and most uniform effective strain. The formation of ultra-fine grain structures and precipitates during the post-ECAP process contributes to the improvements in hardness, yield strength, and ultimate strength.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Avala Lavakumar, Myeong-heom Park, Reza Gholizadeh, Ranjit Kumar Ray, Mitsuhiro Murayama, Nobuhiro Tsuji
Summary: Low-carbon multi-phased steels with transformation induced plasticity (TRIP) effect have attracted significant attention for automotive applications due to their superior mechanical balance between strength and ductility. However, the complex microstructural evolutions during thermo-mechanical processing and the influence of constituent phases on mechanical properties have not been fully understood. In this study, the formation process of multi-phased microstructures in a low alloy steel during intercritical annealing and subsequent partitioning heat-treatment were systematically investigated. The phase fractions of ferrite, martensite, and retained austenite were found to change significantly with increasing holding time at lower temperature. Newly formed ferrite was observed to transform from austenite through massive or bainitic transformation, resulting in different types of ferrite in the final microstructures. The presence of retained austenite was attributed to interstitial carbon diffusion, leading to improved tensile elongation and TRIP effect during deformation. The best strength-ductility balance was achieved with the shortest heat-treatment at lower temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Avala Lavakumar, Myeong-heom Park, Sukyoung Hwang, Hiroki Adachi, Masugu Sato, Ranjit Kumar, Mitsuhiro Murayama, Nobuhiro Tsuji
Summary: Deformation-induced martensitic transformation is a crucial phenomenon for achieving both high strength and large ductility in low alloy multi-phase steels. The transformation induced plasticity (TRIP) effect, which involves the phase transformation from austenite to martensite during deformation, can significantly enhance the strain hardening ability. The mechanical stability of austenite against martensitic transformation is influenced by the surrounding phases, but the details are still unclear.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Amin Ghaedrahmati, Hamid Reza Jafarian, Ali Reza Eivani, Saeed Khani Moghanaki
Summary: Inconel 617 specimens were hot rolled at various temperatures and the effect on dynamic strain aging (DSA) was examined through tensile tests. The microstructural evolution was studied using different techniques and the stress-strain curves were analyzed. Changes in serrated flow and the occurrence of different types of serrations were observed with variations in strain rate and temperature. The activation energy for DSA was calculated and the diffusion of substitutional atoms was found to be the main factor. The hot rolling temperature was also found to significantly influence DSA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yan Chong, Jangho Yi, Guanyu Deng, Nobuhiro Tsuji
Summary: The aging behavior of Ti-1.0 wt pct Fe alloy was studied in this research, focusing on microstructural modifications within the beta grains. At lower aging temperatures, omega(ath) precipitates gradually decreased and were replaced by alpha(s) precipitates. At higher aging temperatures, alpha(s) precipitates increased in size while their volume fraction decreased, indicating a partial alpha to beta reverse phase transformation. The presence of omega(ath) promoted a homogeneous precipitation behavior of alpha(s) precipitates, leading to the formation of plate-shaped alpha(s) precipitates with multiple crystallographic variants.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Wu Gong, Takuro Kawasaki, Ruixiao Zheng, Tsuyoshi Mayama, Binxuan Sun, Kazuya Aizawa, Stefanus Harjo, Nobuhiro Tsuji
Summary: The deformation behavior of a commercial AZ31 magnesium alloy was studied during uniaxial compression at 21 K and 298 K using in-situ neutron diffraction. Decreasing the deformation temperature led to a slight increase in yield stress, but a remarkable enhancement in both the fracture stress and fracture strain. The low temperature sensitivity of the {10 (1) over bar2} extension twinning resulted in the slight increase in yield stress. At 21K, basal slip was suppressed, while extension twinning was promoted, leading to a higher twin volume fraction. The suppression of {10 (1) over bar1}-{10 (1) over bar2} double twinning in the late stage of deformation was considered to be the reason for the delayed fracture at 21 K.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Yan Chong, Reza Gholizadeh, Kaichi Yamamoto, Nobuhiro Tsuji
Summary: The coarse lamellar microstructure of as-cast alpha+beta titanium alloys can be effectively refined by boron additions, which has mainly been attributed to the precipitation of TiB whiskers that pin the growth of prior beta grains. We report an alternative mechanism of colony refinement in Ti-6Al-4V alloy containing trace amounts of boron solutes (0.02 wt.%). Using atom probe tomography, it is discovered for the first time that boron solutes segregate at the alpha/beta phase boundaries, due to its negligible solubilities in both alpha and beta phases. These segregated boron solutes at the alpha/beta phase boundaries restrict an easy growth of grain boundary alpha, and in turn promote the nucleation of more grain boundary alpha variants that serve as nucleation sites of alpha colonies. Hence, the colony size can be substantially refined without the formation of TiB whiskers that could be harmful to the ductility of the material.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Esmaeel Naderi, Hamid Reza Jafarian, Ali Davoodi
Summary: The mechanical properties and corrosion resistance of WE43 magnesium alloy are improved by processing samples using ECAP up to four passes. Yield strength and uniaxial tensile strength continue to improve up to three passes, but deteriorate in the fourth pass. The improvement in properties is attributed to the pinning effect of the precipitated intermetallic secondary phase of beta particles, while the decline in properties is associated with morphology changes.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Mechanical
Hamed Roghani, Ehsan Borhani, Hamid Reza Jafarian, Mohammad Yousefieh, Majid Naseri, Ahmad Ostovari Moghadam
Summary: AA1050/AA2024 layered composites were created through six cycles of the ARB process, with the effect of using reinforcing nanoparticles and the initial aging process on the mechanical properties and microstructure being researched. Equiaxed ultra-fine grain microstructures with grains of about 500 nm in size were formed after six ARB cycles and using reinforcing particles. The addition of alumina nanoparticles resulted in significant improvements in the composite's wear resistance.
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)
