Article
Materials Science, Multidisciplinary
Oleg O. Shichalin, Vladimir N. Sakhnevich, Igor Yu Buravlev, Aleksey O. Lembikov, Anastasia A. Buravleva, Semen A. Azon, Sofia B. Yarusova, Sakhayana N. Danilova, Alexander N. Fedorets, Anton A. Belov, Evgeniy K. Papynov
Summary: The material based on the binary system Ti + Cu (50% atm) was studied, and intermetallic phases including CuTi2, TiCu, and Ti3Cu4 were obtained. The material exhibited good hardness, microhardness, and corrosion resistance, with the variation in hardness being attributed to the presence of pure metal agglomerates. Furthermore, the relationship between the temperature of spark plasma sintering and the material characteristics was revealed.
Article
Materials Science, Ceramics
Lanqing Liang, Boxin Wei, Dong Wang, Wenbin Fang, Lei Chen, Yujin Wang
Summary: Dense (Zr, Ti) (C, N) ceramics with improved mechanical properties were fabricated by spark plasma sintering using ZrC, TiCN, and ZrH2 powders.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Duwang Liu, Zengbin Yin, Fuzhou Guo, Xuelin Li, Juntang Yuan
Summary: The joining of alpha/beta-SiAlON ceramic to WC-8Co cemented carbide using Ti-Cu by spark plasma sintering was studied. The interfacial microstructure and phases were analyzed. The effects of joining temperature, holding time, and pressure on the sheer strength of the joints were investigated. It was found that temperature and holding time had greater impacts on the interfacial reaction during the joining process.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Mohammad Abedi, Atefeh Asadi, Saeed Sovizi, Dmitry Moskovskikh, Stepan Vorotilo, Alexander Mukasyan
Summary: The effect of pulsed direct current (PDC) on solid-state diffusion in the Ni-Al binary system was investigated. It was found that PDC significantly enhanced the growth rates of two intermetallic phases and reduced the activation energy of diffusion.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Xuan Wang, Yan Tang, Maohua Quan, Lei Zheng, Ye Meng
Summary: In this study, Nb-27.3Ti-18Al alloys with columnar strengthening phases were fabricated by SPS and MA. The microstructure evolution and toughening mechanisms of two different powders were analyzed, showing the promotion of columnar phase formation by a specific powder and the good fracture toughness of alloy with 27.3 atomic percentage Ti content.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Linda Abbassi, David Mesguich, Loic Coulomb, Geoffroy Chevallier, Romain Aries, Claude Estournes, Emmanuel Flahaut, Romain Viennois, Mickael Beaudhuin
Summary: In this paper, a simple route to synthesize nano-beta-FeSi2 material is reported. The impact of spark plasma sintering parameters on the material properties is studied. Experimental results show that high-density nano-beta-FeSi2 pellets can be obtained using this method in a short time.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
T. S. Ogneva, I. A. Bataev, V. Mali, A. G. Anisimov, D. Lazurenko, A. Popelyukh, Yu Yu Emurlaeva, A. A. Bataev, S. Tanaka, K. D. Yegoshin
Summary: This study utilized SPS to produce multilayer metal-intermetallic composites and investigated the impact of sintering temperature and pressure on their structure and properties. Results showed that an increase in sintering temperature led to a higher volume fraction of nickel-enriched intermetallic compounds and improved bending strength, while an increase in SPS pressure resulted in a reduction in pores and cracks, leading to enhanced bending strength.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Aleksey Nokhrin, Pavel Andreev, Maksim Boldin, Vladimir Chuvil'deev, Mikhail Chegurov, Ksenia Smetanina, Mikhail Gryaznov, Sergey Shotin, Artem Nazarov, Gleb Shcherbak, Artem Murashov, Galina Nagicheva
Summary: The research showed that Ti-Al-V titanium alloy specimens have a uniform highly dense microstructure and high hardness values, as well as high resistance to electrochemical corrosion and hot salt corrosion. The study also suggested that the differences in corrosion resistance between the central and lateral parts of the specimens are due to diffusion of carbon from the graphite mold into the specimen surface.
Article
Materials Science, Multidisciplinary
Q. Yang, D. L. Cheng, F. G. Zhang, Q. W. Shi, Z. Chen, M. L. Wang, S. Y. Zhong, Y. Wu, H. W. Wang
Summary: The study on spark plasma sintering of atomized Al-Zn-Mg-Cu alloy powders and TiB2/Al-Zn-Mg-Cu composite powders reveals the dual effect of TiB2 particles on densification mechanisms and microstructural evolutions, accelerating the sintering process initially but also adversely affecting it due to solute element segregation.
MATERIALS CHARACTERIZATION
(2021)
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
Peng Yang, Weidong Zhang, Fulin Chen, Zhenggang Wu, Daixiu Wei, Xiaofeng Li
Summary: Ti/beta-Ti laminated composite is widely used in biomedical applications. Densification can be achieved at temperatures above 850 degrees C during fabrication by SPS. The sintering temperature significantly influences the interfacial characteristics, such as increasing the thickness of the interfacial layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Seyed Ali Delbari, Abbas Sabahi Namini, Maziyar Azadbeh, Zohre Ahmadi, Van-Huy Nguyen, Quyet Van Le, Mohammadreza Shokouhimehr, Mehdi Shahedi Asl, Mohsen Mohammadi
Summary: This study fabricated Ti-10 wt% Mo-1 wt% B4C composites using the SPS technique and investigated the effects of sintering temperature and dwell time on their microstructure and mechanical properties. A high relative density of 99.92% was achieved for the composites sintered at 1450 degrees C and further hot-rolled at 900 degrees C. X-ray analysis illustrated the formation of in-situ phases during the SPS process, while microstructural investigation confirmed the influence of sintering temperature and holding time on reducing porosity. Additionally, the post hot rolling at 900 degrees C was shown to modify the microstructure and activate the strengthening mechanism in the prepared composites.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Ceramics
Mingcheng Zhu, Lan Zhang, Na Li, Desen Cheng, Jidong Zhang, Shiyao Yu, Hui Bai, Huizhong Ma
Summary: In this study, ternary ZrB2-SiC-MoSi2 composites with different compositions were successfully fabricated by reactive spark plasma sintering. The densification behavior, microstructures, and mechanical properties were investigated. It was found that the addition of MoSi2 could improve the relative density, hardness, and fracture toughness of the composites, and a core-shell structure could be formed to enhance the overall performance.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Yanfei Yin, Wenjuan Kou, Yongqing Zhao, Wangtu Huo, Weidong Zeng
Summary: The laminated Ti/Ti-50Nb composite, fabricated using spark plasma sintering, demonstrates a favorable combination of strength and ductility. The layered structure helps alleviate strain localization and maintains the total elongation of the composite equivalent to that of pure Ti. The tensile strength and stress-strain curves of the composite can be analyzed using the rule of mixture. Furthermore, microvoids initiate and grow at the interface, leading to the separation of the laminated structure into smaller units.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Junhua Liao, Teng Fei, Yun Li, Youxing Yu, Jiangbo Sha
Summary: In this study, single-phase Nb-SS and two-phase Nb-SS/Nb5Si3 alloys were prepared using the plasma rotating electrode atomization technique (PREA) and further processed by spark plasma sintering (SPS) and arc melting (AM) techniques. The two-phase Nb-SS/Nb5Si3 alloy exhibited higher fracture toughness compared to the single-phase Nb-SS alloy, with different fracture modes observed in each.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Yogesh Srivastava, Sanjay Kumar Vajpai, Sanjay Srivastava
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
Prabhat K. Rai, S. Shekhar, M. Nakatani, M. Ota, S. K. Vajpai, K. Ameyama, K. Mondal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2017)
Article
Materials Science, Multidisciplinary
Yogesh Srivastava, S. Rathod, Pramod K. Singh, Sanjay K. Vajpai, Sanjay Srivastava
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Bhupendra Sharma, Sanjay Kumar Vajpai, Kei Ameyama
Article
Nanoscience & Nanotechnology
Sanjay Kumar Vajpai, Bhupendra Sharma, Mie Ota, Kei Ameyama
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Engineering, Manufacturing
Bhupendra Sharma, Yamada Shogo, Mie Kawabata, Sanjay Kumar Vajpai, Kei Ameyama
MATERIALS AND MANUFACTURING PROCESSES
(2019)
Article
Materials Science, Multidisciplinary
Bhupendra Sharma, Sanjay Kumar Vajpai, Mie Kawabata, Takayoshi Nakano, Kei Ameyama
MATERIALS TRANSACTIONS
(2020)
Article
Metallurgy & Metallurgical Engineering
Ranveer Singh, S. Sharma, S. K. Vajpai
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2020)
Article
Materials Science, Multidisciplinary
Ashish Agrawal, Sanjay Kumar Vajpai
MATERIALS SCIENCE AND TECHNOLOGY
(2020)
Article
Nanoscience & Nanotechnology
Bhupendra Sharma, Motoki Miyakoshi, Sanjay Kumar Vajpai, Guy Dirras, Kei Ameyama
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Prabhat K. Rai, D. Naidu, S. K. Vajpai, B. Sharma, K. Ameyama, K. Mondal
Summary: This work discusses the effect of cold rolling and subsequent annealing on the corrosion and wear behavior of a beta-type commercial Ti-25Nb-25Zr alloy. Results showed that the corrosion resistance of the alloy improved with cold rolling and subsequent annealing treatment, and an increase in grain size also led to an improvement in corrosion resistance for the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Chemical
Bhupendra Sharma, Koki Yagi, Sanjay K. Vajpai, Hiroshi Fujiwara, Kei Ameyama
Summary: A novel systematic fabrication approach, called Bi-modal Milling (BiM), is proposed for preparing austenitic steel with a peculiar bimodal grain size structure. The technique enables precise control of microstructural features through mechanical milling and consolidation process, resulting in materials with higher strength and ductility.
Article
Materials Science, Multidisciplinary
Kei Ameyama, Fabien Cazes, Herve Couque, Guy Dirras, Shoichi Kikuchi, Jia Li, Frederic Mompiou, K. Mondal, Dmytro Orlov, Bhupendra Sharma, David Tingaud, Sanjay K. Vajpai
Summary: The harmonic structure is a new concept that allows engineering metallic materials to achieve excellent mechanical performance. It consists of soft coarse-grained regions surrounded by a network of hard ultra-fine grained regions. The interaction between these regions produces a synergistic effect, leading to superior mechanical properties. This review critically assesses the concept and discusses key issues for further study.
MATERIALS RESEARCH LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Lav Kush, Sanjay Srivastava, C. Sasikumar, Sanjay Kumar Vajpai, Yogesh Srivastava, Yash Jaiswal
Summary: This research focuses on the synthesis, characterization, and low temperature thermoelectric characteristics of La2-xPrxFeCoO6 double perovskite. The results show that with increasing Pr concentration, the crystallite size increases and the bandgap decreases, leading to increased conductivity, power factor, and figure of merit. The LaPrFeCoO6 compound exhibits the highest figure of merit at 300K.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Lav Kush, Sanjay Srivastava, C. Sasikumar, Sanjay Kumar Vajpai, Yogesh Srivastava, Yash Jaiswal, Aysh Y. Madkhli, Mohd Nor Faiz Norrrahim
Summary: This work focuses on the synthesis, characterization, and thermoelectric properties of La2-xPrxFeCoO6 ceramics. The samples were prepared using the sol-gel technique and studied for their crystal structure, microstructural characteristics, electrical properties, and thermal transport characteristics. The results showed that increasing the Pr concentration led to increased crystallite size and the occurrence of multivalent oxidation states of La, Pr, Fe, Co, and O. The conductivity increased with temperature up to a maximum value at a transition temperature, indicating metallic behavior. The La2-xPrxFeCoO6 compound exhibited p-type charge carrier and the intrinsic behavior was preserved with increasing doping concentration. The highest Figure of Merit was observed at x = 1.0, which was 5.4 times higher than at x = 0.0.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
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)
