Article
Materials Science, Ceramics
Serhat Sap, Aydin Turgut, Mahir Uzun
Summary: Through microstructure studies, a homogeneous interface between reinforcement elements and main matrix was determined in the Cu/Ti-B-SiCp hybrid composite materials; the samples with 6 wt% reinforcement ratio showed the highest hardness value, while samples with 4 wt% reinforcement ratio exhibited the maximum strength values in hardness and strength tests.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
S. Lv, J. S. Li, S. F. Li, N. Kang, B. Chen
Summary: This study investigated the effect of heat treatment on the interfacial bonding in titanium matrix composites reinforced with carbon fibers. Results showed that the best mechanical properties were achieved at a heat treatment temperature of 900 degrees C. Suitable interfacial reaction and fine grain size were identified as critical factors for obtaining high-performance CFs/TMCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xiaofeng Li, Ao Fu, Yuankui Cao, Shenghang Xu, Shenghan Gao
Summary: By introducing carbides into the TiNbTaZrHf based composite, it exhibits ultra-high yield strength at room temperature and maintains high strength at high temperatures. However, the strength decreases significantly as the temperature rises, mainly due to the weakening of load-bearing effect and interfacial debonding between the matrix and carbides.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Dongxin Mao, Xiangchen Meng, Yuming Xie, Yuchen Yang, Yanli Xu, Zhiwei Qin, Yuexin Chang, Long Wan, Yongxian Huang
Summary: The strategy of strength-ductility balance in aluminum matrix composites reinforced with nano- and micro-SiC particles was designed through deformation-driven metallurgy. Grain refinement and optimization of SiC particles were key to achieving increased ultimate tensile strength and ductility in the composite materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Sujung Son, Peyman Asghari-Rad, Alireza Zargaran, Wen Chen, Hyoung Seop Kim
Summary: This study successfully fabricated a nanostructured CoCrFeNi medium-entropy alloy with excellent tensile properties through cold powder consolidation and annealing techniques. The enhanced tensile strength at cryogenic temperatures can be attributed to intensive mechanical twin activities. Engineering the microstructure through subsequent annealing leads to a desirable synergy of strength and ductility, which is of great importance in structural applications.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Multidisciplinary
Hongyun He, Genlian Fan, Farhad Saba, Zhanqiu Tan, Zhu Su, Dingbang Xiong, Zhiqiang Li
Summary: Achieving a uniform dispersion and high efficiency in metal matrix nanocomposites with a high-content of nano-reinforcements is challenging. Flake dispersion, a process combining flake powder metallurgy with high-shear dispersion, can be used to address this issue. By using flake Al powders coated with a high content of SiC nanoparticles, the resulting nanocomposites showed a uniform distribution of nanoparticles and improved mechanical properties.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Khansaa Dawood Salman, Wisam Abed Kattea Al-Maliki, Falah Alobaid, Bernd Epple
Summary: This study aims to investigate the microstructure and mechanical properties of an Al matrix incorporated with various amounts of Fe2O3 and a constant amount of Ag. The results show that Fe2O3 and Ag nanoparticles are uniformly distributed in the Al matrix, and the addition of 12 wt.% Fe2O3 + 1Ag significantly enhances the micro-hardness and compressive strength, while reducing the wear rate to a minimum.
APPLIED SCIENCES-BASEL
(2022)
Article
Automation & Control Systems
S. Fida Hassan
Summary: In this study, a heterogeneous microstructure was developed in commercially pure magnesium using traditional blend-press-sinter powder metallurgy process, followed by hot extrusion process. Microstructural and mechanical properties were characterized in sintered and extruded samples, revealing significant improvements in hardness and mechanical strength with substantial grain refinement due to the extrusion process. The heterogeneous magnesium exhibited high strength and remarkable ductility, reaching an extraordinarily high level in the extruded samples.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
P. Sai Karthik, S. Ganesh, P. S. Ninawe, M. Battabyal, S. B. Chandrasekhar, R. Vijay
Summary: This study investigates the fabrication of austenitic oxide dispersion strengthened (AODS) steel using Ni-20Cr instead of commonly used Ni in second-stage ball milling. The mechanical alloying process was studied by measuring the yield and average size of milled powder. The AODS powder was subsequently consolidated using hot extrusion and solution annealed. The results showed improved powder yield and comparable strength levels to reported values.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Y. Saberi, H. Oveisi
Summary: A precise approach for the fabrication of cellular Cu-Al composite materials with favorable physical properties was developed using ball milling and polyethylene glycol as a space holder. The resulting porous composite materials exhibited uniform pore size distribution and different porosity percentages, with excellent thermal and electrical conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Shigeru Katsuyama, Kohei Kamoya
Summary: A sintered composite made of p-type Si0.99B0.01 and insulative SiO2 particles was studied for its thermoelectric properties. The electrical conductivity and thermal conductivity of the composite were found to change with the volume fraction of Si0.99B0.01, showing specific trends at different stages of volume fraction increase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
D. Vogiatzief, A. Evirgen, M. Pedersen, J. Czerski, M. Mitoraj-Krolikowska, E. Godlewska, E. Eshed, U. Hecht
Summary: This study focuses on the Al0.8CrFe2Ni2 high entropy alloy fabricated using laser powder bed fusion with pre-alloyed powder. Heat treatment of the as-built material resulted in a dual-phase microstructure composed of face-centered-cubic grains and Al-, Ni-rich body-centered-cubic B2 precipitates. The effects of heat treatment on the alloy's properties were explored through microstructure characterization, mechanical, and corrosion testing. The results demonstrate that mechanical properties can be tailored by controlling the size of precipitates through heat treatment. Refining the precipitates improves strength without significant loss of ductility. Corrosion tests show that the as-built samples display better overall corrosion resistance compared to heat-treated samples, attributed to the influence of precipitates on micro-galvanic cell formation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Guttikonda Manohar, K. M. Pandey, S. R. Maity
Summary: A nano hybrid composite of AA7075 + 6%B4C+3%ZrC was successfully fabricated with improved mechanical properties using microwave sintering technique. The microstructural investigation showed agglomerates of nano ZrC particles and homogenous distribution of B4C particles. Microwave sintered composites exhibited excellent mechanical properties, with clean interface bonds between matrix and reinforcement particles and a higher strain to fracture value compared to conventionally sintered composites.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
M. R. Akbarpour, S. Alipour, M. Najafi, T. Ebadzadeh, H. S. Kim
Summary: This study investigated the rapid synthesis of nanostructured NiTi-Ni3Ti intermetallic alloy from titanium and nickel powders through mechanical alloying followed by microwave-assisted sintering process. The research found that the sintering temperature had a significant impact on the density, porosity, and microhardness of the samples, with the highest density and microhardness achieved at a sintering temperature of 1100 degrees C. The results suggest that microwave-assisted sintering can be utilized to fabricate Ni-Ti alloys with improved mechanical properties for biomedical applications.
Article
Materials Science, Multidisciplinary
Amal M. K. Esawi, Nesma T. Aboulkhair
MATERIALS & DESIGN
(2015)
Article
Engineering, Chemical
Nouran El Badawi, Adham R. Ramadan, Amal M. K. Esawi, Mohamed El-Morsi
Article
Nanoscience & Nanotechnology
Nesma T. Aboulkhair, Marco Simonelli, Ehab Salama, Graham A. Rance, Nigel C. Neate, Christopher J. Tuck, Amal M. K. Esawi, Richard J. M. Hague
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Chemistry, Multidisciplinary
Mohammed Elsharkawi, Amal M. K. Esawi
Article
Automation & Control Systems
H. Hegab, U. Umer, A. Esawi, H. A. Kishawy
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Ahmed O. Rashed, Amal M. K. Esawi, Adham R. Ramadan
Article
Chemistry, Multidisciplinary
Meriam Mohammedture, Shamma Al Hashmi, Jin-You Lu, Monserrat Gutierrez, Amal M. K. Esawi, Mohamed Al Teneiji
Summary: This study conducted a numerical investigation of capacitive graphene oxide humidity sensors using COMSOL Multiphysics, focusing on the impact of dimensions and etching effects on sensing performance. The results showed that etching can improve the sensitivity of humidity sensors, with different types of etching resulting in varying effects on sensor performance.
Article
Biochemistry & Molecular Biology
Nouran A. Elbadawi, Adham R. Ramadan, Amal M. K. Esawi
Summary: The study investigates the effects of different sizes of carbon nanotubes on mixed matrix membranes in nanofiltration applications. The results show that shortening the carbon nanotubes enhances the hydrophilicity of the membranes and affects the formation of macrovoids and micropores. Additionally, shortening the nanotubes improves the permeation rates but has a slight adverse effect on salt retention.
Article
Materials Science, Multidisciplinary
Kirolos Bastwros, Abdalla Wifi, Amal Esawi
Summary: Boron nitride nanotubes (BNNTs) are structurally similar to carbon nanotubes (CNTs) and have comparable mechanical properties. In addition, they surpass CNTs in terms of thermal stability and inertness. A novel Al-BNNT dual matrix composite is investigated in this study, and it is found that the dual matrix composite exhibits enhanced mechanical properties without significant reduction in ductility, compared to the bi-modal Al.
EMERGENT MATERIALS
(2022)
Article
Polymer Science
Ahmed M. Abdel-Gawad, Adham R. Ramadan, Araceli Flores, Amal M. K. Esawi
Summary: The study found that solution compounding can be used to prepare nylon 6/montmorillonite nanocomposites with exfoliated effect and more stable crystalline structure compared to melt blending.
Review
Chemistry, Multidisciplinary
Nitul S. Rajput, Shroq Al Zadjali, Monserrat Gutierrez, Amal M. K. Esawi, Mohamed Al Teneiji
Summary: This review systematically summarizes the synthesis methods of holey or porous graphene/graphene oxide and discusses their potential applications in various fields. The explanation of the process-structure-applications relationship helps readers understand the different synthesis methods and key parameters to control pore size distribution. This review paper is expected to benefit readers in comprehending the advantages, limitations, and potential applications of holey graphene in diverse fields.
Article
Chemistry, Multidisciplinary
Mohamed Abubakr, Tarek A. Osman, Hossam A. Kishawy, Farida Elharouni, Hussien Hegab, Amal M. K. Esawi
Summary: Nanofluids are considered an attractive solution for sustainable machining of difficult-to-cut materials. This study examines the effects of various preparation factors on nanofluid characteristics, emphasizing the role of aggregate morphology on viscosity and proposing a novel mechanism for nanoparticles' influence on wettability based on nanolayering theory. The multi-objective optimization analysis suggests that moderate MWCNT concentration, high sonication time, and low surfactant amount are optimal within the search domain.
Article
Materials Science, Multidisciplinary
Ehab I. Salama, Sherry S. Morad, Amal M. K. Esawi
Article
Engineering, Manufacturing
Ehab I. Salama, Aya Abbas, Amal M. K. Esawi
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2017)
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)
