Article
Materials Science, Multidisciplinary
Suyeon Kim, Taehyun Kwon, Seulgi Kim, Sung Ho Song, Dongju Lee
Summary: This study examines the effect of two different methods, oxide reduction and mechanical alloying, on the sintering behavior and microstructure of molybdenum-tungsten sintered compacts. The sintered compacts produced with oxide-reduced nanopowders exhibit higher density, purity, and a finer microstructure, making them more suitable for sputtering targets.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yaqian Liang, Qian Lei, Xiukuang Zhang, Dong Jiang, Yunping Li
Summary: A Cu-5 wt% Mo alloy with high conductivity and high anti-soften temperature was successfully fabricated using mechanical alloying combined with spark plasma sintering (SPS). The rolled and aged Cu-5 wt% Mo alloy exhibited improved density, electrical conductivity, and anti-soften temperature.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Chun-Liang Chen, Sutrisna
Summary: The effects of Cu-containing medium entropy alloy binder and sintering temperatures on the synthesis, sintering behavior, and mechanical properties of tungsten alloys were investigated. It was found that high sintering temperatures led to poor bonding strength, while low sintering temperatures resulted in high strength and hardness.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Engineering, Chemical
A. Antolak-Dudka, D. Oleszak, R. Zielinski, T. Kulik
Summary: The aim of this study was to manufacture tungsten composites from different initial powder mixtures by mechanical alloying followed by sintering. The results showed the formation of tungsten-based solid solution during milling, and new carbide phases appeared after consolidation. The microstructure of the sintered bodies was found to be non-homogeneous, with regions rich in different elements.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Vadla Suman, R. S. Maurya, M. Debata, D. Chaira
Summary: The present research focuses on the fabrication of nano-scale yttria dispersed pure W and its alloys using mechanical alloying and subsequent sintering. The addition of Si leads to a reduction in particle size, while the addition of Ni and Co prevents the formation of intermetallic compounds. After sintering, different intermetallic compounds and oxide phases are observed in different alloys.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Yuki Jimba, Sosuke Kondo, Hao Yu, Haoran Wang, Yasuki Okuno, Ryuta Kasada
Summary: A new sintering process called TLPDS has been developed for high-melting-point borides, using a eutectic TiB-Ti powder as the sintering aid. This approach has successfully improved the sinterability of TiB2.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Ruoyu Chen, Adam Bratten, Joshua Rittenhouse, Haiming Wen
Summary: The use of mechanically alloyed Al2O3-Y2O3 mixtures as sintering additives can promote liquid phase sintering of SiC, but prolonged ball milling time results in an excessive volume of complex oxide phases in the sintered specimens, negatively affecting the mechanical properties of SiC specimens.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Anna Knaislova, Vendula Simunkova, Pavel Novak, Filip Prusa, Marcello Cabibbo, Lucyna Jaworska, Dalibor Vojtech
Summary: Intermetallic alloys based on Ti-Al-Si system are significant for their excellent high-temperature properties, but high brittleness at room temperature is a main concern. Adding alloying elements has been attempted to improve the properties, but porous microstructure remains a challenge.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yong Zhang, Yufeng Huang, Wensheng Liu, Yunzhu Ma, Jiayi Liu, Chaoping Liang
Summary: By using tungsten-tantalum particles as the sintered core and forming a solid solution, the precipitation of an acicular phase during the sintering process reduces the liquid phase sintering temperature of tungsten alloys and improves their mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yao Wang, Yufeng Huang, Wensheng Liu, Baishan Chen, Jiayi Liu, Lei Zhang, Peiyuan Fan, Yunzhu Ma
Summary: The addition of Ta or Re alone can improve the performance of tungsten alloys, but the combined addition of Ta and Re results in complex diffusion behavior and the formation of new phases. W-Ta-Re-Ni-Fe alloys with different Re contents were prepared using two methods, and the compositions and structures of the precipitated phase were analyzed. The addition of Re refined the grain size and mechanical alloying strengthened the W particles, while the reaction of Ta and Ni resulted in the generation of a reinforced phase.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Jun Zhou, Hengcheng Liao, Hao Chen, Aijing Huang
Summary: A non-equiatomic high entropy alloy was successfully synthesized by mechanical alloying plus spark plasma sintering, showing higher compression yield strength and smaller grain size than alloys prepared by arc-melting method. This is mainly attributed to the combined effects of dislocation hardening, fine grain strengthening and precipitation hardening of second phase particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
C. Jia, M. R. Akbarpour, M. Ahmadi Gharamaleki, T. Ebadzadeh, H. S. Kim
Summary: Equiatomic Ni-Ti alloy reinforced with SiC nanoparticles of different volume percentages was synthesized through mechanical alloying and microwave sintering. The addition of SiC nanoparticles increased the content of hard Ni3Ti phase, promoted the stability of the martensite phase, and inhibited matrix grain growth. The high microhardness of the synthesized nanocomposites is attributed to the formation of Ni3Ti and NiTi martensitic phases and their nanocrystalline structure.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Jiang Wu, Xuguang An, Jing Zhang, Shaofeng Lei, Yi Guo, Xiwei Xu, Weitang Yao, Qingyuan Wang, Qingquan Kong
Summary: Ti-24Nb-4Zr-3Mn alloys were prepared using mechanical alloying and spark plasma sintering. The study found that increasing the milling time reduces the particle size of the alloy powder, but increases the oxygen content. Among all the investigated alloys, Ti-24Nb-4Zr-3Mn alloy prepared by 20-hour milling showed excellent comprehensive mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Shuhei Nogami, Itsuki Ozawa, Daisuke Asami, Naoya Matsuta, Seiji Nakabayashi, Siegfried Baumgaertner, Philipp Lied, Kiyohiro Yabuuchi, Takeshi Miyazawa, Yuta Kikuchi, Marius Wirtz, Michael Rieth, Akira Hasegawa
Summary: The addition of tantalum to tungsten-tantalum alloys improves their mechanical properties, resistance against recrystallization, and resistance to high heat flux exposure. This makes them a promising material for fusion reactor applications.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yong Zhang, Yufeng Huang, Wensheng Liu, Yunzhu Ma, Yao Wang, Chaoping Liang
Summary: The method of adding initial elements significantly affects the structure and mechanical properties of tungsten alloy. In this study, the 90(W-20Ta)-Ni-Fe alloy was prepared using direct addition of elements and W-Ta pre-alloying. The diffusion of elements and phase transformation behavior under different conditions were discussed. It was found that direct addition of tantalum led to the deterioration of alloy structure, while W-Ta pre-alloying improved both the uniformity and strength of the alloy.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Suresh Bandi, Devthade Vidyasagar, Shaik Adil, Manish Kumar Singh, Joysurya Basu, Ajeet K. Srivastav
SCRIPTA MATERIALIA
(2020)
Article
Materials Science, Multidisciplinary
Ajeet K. Srivastav, Suresh Bandi, Abhishek Kumar, B. S. Murty
PHILOSOPHICAL MAGAZINE LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Suresh Bandi, Ajeet K. Srivastav
Summary: The study elucidated the formation and growth mechanisms of hematite nanoparticles during the synthesis process, including the formation pathway, timing, and mechanisms of growth.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
V. B. Rajkumar, Yong Du, Shuhong Liu, Kaiming Cheng, Ajeet Kumar Srivastav
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2020)
Review
Materials Science, Multidisciplinary
Suresh Bandi, Ajeet K. Srivastav
Summary: Oxygen-deficient/non-stoichiometric tungsten oxides exhibit unique structures and properties compared to stoichiometric tungsten oxides. Oxygen vacancies induce re-adjustment of atomic arrangement to compensate for oxygen deficiency and impact crystal chemistry.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Anuj Khond, Chinmoy Chattopadhyay, Bhaskar Majumdar, Jatin Bhatt, Ajeet K. Srivastav
Summary: The glass-forming ability (GFA) of the Hf-Cu-Ni system was evaluated using a kinetic approach, with findings showing that decreasing Hf content enhances the GFA. This is consistent with previous literature.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Anuj Khond, Shashi B. Arya, Bhaskar Majumdar, Jatin Bhatt, Ajeet K. Srivastav
Summary: The study found that the Hf-rich Hf64Cu18Ni18 metallic glass has high corrosion resistance in alkaline solutions, while pitting corrosion is more likely to occur in acidic solutions. The non-uniform distribution of the corroded surface is related to the inhomogeneity of the sample.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2021)
Article
Crystallography
Ajeet K. Srivastav
Summary: This study investigates the temperature dependent magnetization of dual-phase Co nanowires grown inside nanoporous alumina membrane. Phase analysis and magnetic measurements confirmed mixed-phase structures of hcp and fcc-Co, with discussions on the role of phase structures and magnetic anisotropies. The temperature dependent reorientation of easy magnetization axis and resulting magnetic properties were attributed to magneto-structural coupling in the confinedly grown Co nanowires.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Physics, Condensed Matter
Yogesh Prabhu, Ajeet K. Srivastav, D. Gunderov, Jatin Bhatt
Summary: This study proposes a theoretical approach to design Zr-rich glass forming composition in Ni-free Zr-Cu-Al-Fe quaternary system and analyzes the effects of elemental Al, Fe, and Dy on glass forming ability. By optimizing chemical interactions and topological features, the enthalpy of chemical mixing and atomic size mismatch entropy were determined, leading to the synthesis of Zr62Cu22Al10Fe5Dy1 bulk metallic glass.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Suresh Bandi, Ajeet K. Srivastav
Summary: This study reports the formation of cubic-H0.5WO3 by heat treatment of nanocrystalline W under H2O(v) atmosphere, where W reacts with H2O(v) to produce gamma-WO3 and hydrogen gas. Subsequently, hydrogen intercalation to the interstitial sites of WO3 results in nanocrystalline cubic-H0.5WO3.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Manoj Settem, Ajeet K. Srivastav, Anand K. Kanjarla
Summary: The study investigates the structure of octahedral Ag-Cu nanoalloys using BHMC searches to optimize shape and chemical ordering. The addition of Cu affects the shape and defects of the nanocrystal, with misfit strain playing a key role in determining the structure.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Suresh Bandi, Ajeet K. Srivastav
Summary: This study reveals the growth mechanism of W18O49 nanowires on W surfaces under H2O(v) atmosphere and demonstrates phase evolutions in view of detailed thermodynamic considerations. Oxygen vacancy-induced planar defects are responsible for the 1d [010] growth of W18O49 NWs, while hexagonal tunnels along the NW length create a passage for H2O(v) to repeat the reaction and increase the NW length.
Article
Crystallography
Anuj Khond, Shaik Adil, K. Guruvidyathri, B. S. Murty, Bhaskar Majumdar, Jatin Bhatt, Ajeet K. Srivastav
Summary: This study investigated the crystallization kinetics and phase formation of the Hf64Cu18Ni18 glassy ribbon. It was found that the ribbon crystallizes via two exothermic peaks, with calculated activation energies using Kissinger and Augis-Bennett methods. The crystallization product was identified by X-ray diffraction and discussed in view of prediction using the CALculation of PHAse Diagram (CALPHAD) approach.
Article
Materials Science, Multidisciplinary
Suresh Bandi, N. Naga Suresh, Toshali Bhoyar, Ajeet K. Srivastav
Article
Chemistry, Multidisciplinary
Suresh Bandi, Ajeet K. Srivastav
Summary: This study found that the monoclinic γ-WO3 phase transforms into the low-temperature triclinic δ-WO3 phase during high energy ball milling, leading to an anomalously stabilized structure. The transformation is attributed to HEBM-induced pressure/compression causing atomic displacement and octahedral tilting-driven polymorphic transition.
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)
