Article
Chemistry, Physical
Thomas Rieger, Jean-Marc Joubert, Regis Poulain, Xavier Sauvage, Elie Paccou, Loic Perriere, Ivan Guillot, Guy Dirras, Guillaume Laplanche, Mathilde Laurent-Brocq, Jean-Philippe Couzinie
Summary: This study investigates the coarsening kinetics of four complex concentrated alloys in the Al-Ti-Cr-Fe-Co-Ni system. The results show that the chemical compositions of the alloys have a significant impact on Ostwald ripening. By using atom probe tomography and thermo-kinetic modeling, the key parameters affecting ripening are identified and the corrected activation energies are in better agreement with diffusion data.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chiwon Kim, Jiun Park, Hyun-Uk Hong, Jiho Gu, Youngseok Song
Summary: The effects of stabilization conditions on microstructure evolution and mechanical properties of Ni-Fe-based superalloy Inconel 706 were investigated. The results showed that increasing the stabilization temperature led to an increase in precipitates and improved yield strength. Furthermore, the high temperature stabilization resulted in higher creep strain in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
You Wu, Haozhi Zhao, Jikang Li, Yuanyuan Zhang, Jiantao Liu, Tong Liu
Summary: A new heat treatment processing, high temperature pre-precipitation treatment (HTPT), has been developed to achieve serrated grain boundaries and fine gamma' precipitates in powder metallurgy nickel-based superalloys. The effects of HTPT conditions on the microstructure have been systematically characterized.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Wanshun Xia, Xinbao Zhao, Quanzhao Yue, Liang Yue, Jiangwei Wang, Qingqing Ding, Hongbin Bei, Ze Zhang
Summary: The chemical and structural evolution of dislocation networks in a nickel-based single crystal superalloy under high temperature and pressure conditions were investigated in this study. The formation mechanism of γ'(n) phase and the significance of γ/γ' substructures in stabilizing dislocation networks were revealed.
Article
Chemistry, Physical
Diego de Araujo Santana, Claudio Shyinti Kiminami, Francisco Gil Coury
Summary: This study focuses on the prediction of yield strength of a newly developed alloy through experimental and modeling approaches. The results demonstrate that different strengthening mechanisms can be modeled independently with satisfactory accuracy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Damian Migas, Bartosz Chmiela, Hanna Myalska-Glowacka, Grzegorz Moskal, Krzysztof Matus, Radoslaw Swadz
Summary: The study investigates the individual role of yttrium and Y-related phases during oxidation of Co-based alloys. It reveals that the addition of yttrium improves the oxidation resistance of the alloys, especially under cyclic conditions. The yttrium-containing oxide areas within the oxide scale correspond to the original yttrium-rich particles in the alloy.
Article
Materials Science, Multidisciplinary
Christopher H. Zenk, Longsheng Feng, Donald McAllister, Yunzhi Wang, Michael J. Mills
Summary: The study investigates the shear process of Ni-base superalloy 718 at different temperatures and the deformation mechanisms of the co-precipitates. It reveals the presence of different intrinsic stacking faults in the gamma '' and gamma' phases, as well as offsetting of interfaces in the co-precipitates after shearing.
Article
Biochemistry & Molecular Biology
Nurhan Turgut Dunford, Zinar Pinar Gumus, Canan Sevimli Gur
Summary: This study compared the chemical composition and antioxidant properties of extracts from two byproduct streams generated during commercial pecan nut shelling. The industrial byproducts were found to have different chemical compositions from the hand-separated shells. Water extracts showed significant antioxidant activity, with the highest capacity obtained from extracts obtained via subcritical water. The study provides new data on the properties of industrial nut shelling byproducts and their potential use as antioxidants.
Article
Nanoscience & Nanotechnology
Hongkai Zhang, Yan Li, Hechuan Ma, Peng Zhang, Tengfei Ma, Ke Huang
Summary: A new manufacturing method that only involves pre-annealing and hot deformation steps is proposed in this study, which successfully modulates diverse nanoscale precipitation strengthening phases with similar grain sizes. The modulated alloys exhibit high strength without the need for lengthy post-processing treatments.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Wenchao Yang, Huajing Zong, Chen Yang, Pengfei Qu, Haijun Su, Yin Dong, Jun Zhang, Lin Liu
Summary: The effect of Fe addition on y' precipitates in Ni-20Co-xFe-12Cr-7.5Al-7.5Ti-1.5 W single crystal superalloys was systematically studied. The results showed that higher Fe content resulted in a lower volume fraction and changed morphology of y' precipitates. Additionally, the alloy with Fe addition exhibited a higher coarsening rate of y' precipitates during thermal exposure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
W. -W. Xu, Z. Y. Xiong, Q. Yu, T. Q. Gang, L. J. Chen
Summary: This study investigates the effects of Ni and Al/W on the plastic deformation mechanism of gamma' precipitates in Co-based superalloys using first principles. The results show that alloying Ni and adjusting Al/W significantly alter dislocation glide and twinning nucleation, with excessive addition of Ni or W deteriorating strength. The ratio of effective planar fault energy plays a crucial role in bridging energy barriers and deformation mechanisms in superalloys at elevated temperatures.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Etienne Martin, Arunkumar Natarajan, Srikanth Kottilingam, Rasim Batmaz
Summary: This study examines the advantages and disadvantages of using BJAM to produce high gamma' Ni-based superalloys. During the sintering process, the formation of HfO2 and Ta-rich carbides along prior particle boundaries was observed, impacting the mechanical properties of the material.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Rasim Eris, M. Vedat Akdeniz, Amdulla O. Mekhrabov
Summary: The site preferences of transition X metals in Ni-based superalloys significantly affect their mechanical properties, with larger X elements preferring Al sites and smaller X elements potentially weakening the bonding strength.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Samin Fathalinejad, Esben Taarning, Peter Christensen, Jan H. Christensen
Summary: This study developed a GC-MS identification workflow for carbohydrate fragmentation compounds, built a library of compounds detected by five different GC-MS methods, investigated and compared compound coverage among the methods, and explored possible reaction pathways for some analytes. A total of 389 compounds were detected, with solid-phase microextraction detecting the highest number of analytes and derivatization GC-MS technique detecting the lowest but largest molecules.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Food Science & Technology
Xinyu Yu, Xinyue Tu, Lingchen Tao, Jayasimha Daddam, Shanshan Li, Fuliang Hu
Summary: This review summarizes the current knowledge on the chemical composition, extraction methods, and biological activities of royal jelly fatty acids, providing a theoretical basis for expanding prospective applications of royal jelly in human health.
JOURNAL OF FUNCTIONAL FOODS
(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)