Article
Nanoscience & Nanotechnology
Katsuya Yokota, Abdollah Bahador, Kazuki Shitara, Junko Umeda, Katsuyoshi Kondoh
Summary: The tensile strength of single beta phase titanium alloy Ti-35 at.% Ta was improved using oxygen solid solution, leading to an increase in 0.2% yield strength. This increase in strength was mainly attributed to the effect of oxygen solid solution, as confirmed by theoretical trends in the experimental results.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Xiaobo Wu, Shuzhu Zhou, Fengjing Wu, Pingping Gao, Ting Lei, Li Xiao, Chunxuan Liu, Haikun Zhou, Chun Ouyang
Summary: (Ti,La)(C,N)-based cermets fabricated with LaB6 addition show improved microstructure homogeneity and hardness, with optimal La content of 0.25wt%. LaB6 addition acts as a deoxidizer, reducing oxygen content in cermets and enhancing their performance.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Chemistry, Physical
Takuma Teramae, Takayuki Tanaka, Mizuki Fukuo, Kazuki Shitara, Junko Umeda, Shufeng Li, Abdulaziz Alhazaa, Katsuyoshi Kondoh
Summary: Commercial pure Ti alloys are often used in biomedical applications, but they need to be strengthened by adding alloying elements. Ti-Fe alloys modified with Zr were investigated in this study to produce high-strength, ductile, and biocompatible alloys. The addition of Zr solid solution increased lattice constants and refined grain size, leading to improved mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Chufan Wang, Qi Cai, Jinxu Liu, Xifeng Yan
Summary: Titanium-tantalum alloys with lamellar microstructure were successfully fabricated using a low-cost powder metallurgy method. The Ti-Ta alloy showed a tensile yield strength of 1124 MPa, twice that of the cast Ti-Ta alloys. The lamellar structure strengthening was identified as the dominant mechanism for the high strength of the Ti-Ta alloys prepared by powder metallurgy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Review
Materials Science, Multidisciplinary
Jing Xue, Fang Luo, Yali Zhang, Yongjian Fang, Xiaosong Jiang
Summary: Titanium (Ti) is widely used in biomedical implants due to its excellent mechanical properties and biocompatibility. However, the stress shielding effect limits its application. Incorporating bioactive elements into titanium alloys, such as magnesium (Mg), can provide specific biological functions through sustained release. Despite the incompatibility between Ti and Mg, Ti-Mg composites have potential for biomedical applications, and their preparation methods, properties, and biocompatibility are discussed in this review.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Abdollah Bahador, Junko Umeda, Ridvan Yamanoglu, Tuty Asma Abu Bakar, Katsuyoshi Kondoh
Summary: Fully dense powder metallurgy (PM) Ti-4Fe-0.2O-3Cu-0.4Si alloy was produced using spark plasma sintering (SPS) and hot extrusion to develop an inexpensive high strength dual-phase Ti alloy. The addition of Si solute remarkably enhanced the microstructure stability and yield strength of the alloy at high temperature. The principal strengthening mechanisms were grain refinement and solid solution phenomena, leading to a comparatively higher tensile strength of the alloy compared to conventional Ti-6Al-4V alloy produced by a similar method.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Ceramics
H. Besharatloo, M. de Nicolas-Morillas, M. Chen, A. Mateo, B. Ferrari, E. Gordo, E. Jimenez-Pique, J. M. Wheeler, L. Llanes
Summary: The influence of microstructure and processing route on the mechanical response, deformation, and failure mechanisms of Ti(C,N)-FeNi cermets were investigated by compressing micropillars milled by focused ion beam. Stress-strain curves and deformation mechanisms were observed using scanning electron microscopy. The appropriate micro-pillar size was determined based on the microstructural characteristics to overcome scale effect issues. The results showed a direct relationship between yield strength and ceramic/metal ratio for colloidal samples, and deformation of metallic binder and glide between Ti(C,N)/Ti(C,N) particles were dominant mechanisms during compression.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Katsuyoshi Kondoh, Mizuki Fukuo, Shota Kariya, Kazuki Shitara, Shufeng Li, Abdulaziz Alhazaa, Junko Umeda
Summary: In this study, extruded Ti-Zr alloys were prepared by alloying titanium with zirconium to improve its mechanical properties. The synthesized alloys exhibited excellent tensile elongation at room temperature and smaller grain size compared to pure titanium. Grain refinement and solid-solution strengthening were found to have an equal effect on increasing the yield stress of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Junko Umeda, Takayuki Tanaka, Takuma Teramae, Shota Kariya, Junji Fujita, Hiroshi Nishikawa, Yoji Shibutani, Jianghua Shen, Katsuyoshi Kondoh
Summary: In this study, Ti-Fe alloys were fabricated using Fe as a beta-phase stabilizer via powder metallurgy. The addition of Fe resulted in increased beta-Ti volume fraction and refined alpha-Ti grains, leading to significant improvements in tensile strength and ductility. The dominant strengthening factors for these alloys were alpha-Ti grain refinement and beta-Ti hard phase dispersion, with 50% of the yield stress increase attributable to the latter mechanism in the case of 4 wt% Fe addition.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Coatings & Films
Sergio dos Anjos, Fernando Henrique da Costa, Edwin Sallica-Leva, Rubens Caram, Vicente Amigo, Joao Batista Fogagnolo
Summary: Laser surface treatments can improve material properties in sintered parts. Preplaced powder laser alloying results in deeper fusion zones and higher alloy dilution. Modified layers have higher hardness than substrates, and different alloy elements affect surface layer elastic modulus differently.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Chemical
Shunyuan Xiao, Shaofu Li, Xuemeng Gan, Yafeng Yang
Summary: An electrostatic self-assembly strategy combining surface functional modification and solid-liquid fluidized bed powder coating treatment was proposed to synthesize a novel LaB6-coated Ti composite powder with excellent O-scavenging efficiency and high utilization rate. The as-sintered Ti samples with low LaB6 coating-content showed significantly improved tensile strength and elongation.
Article
Nanoscience & Nanotechnology
Kaifeng Jing, Zhixing Guo, Tao Hua, Ji Xiong, Jun Liao, Lei Liang, Shandong Yang, Jiansong Yi, Hong Zhang
Summary: In this study, the researchers investigated the microstructural changes of the WC hard phase, phase transition of Cobalt (Co) in the binder, and grain boundary characteristics in cemented carbides containing Rhenium (Re). The addition of Re resulted in a decrease in mean grain size of WC and promoted the transition of Co phase from fcc to hcp structure. Re also weakened the concentration of preferred textures and increased the number of special grain boundaries. The increase in Re content led to higher hardness, transverse rupture strength, and wear resistance in the cemented carbides.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Chemical
C. Yang, J. C. Wang, L. M. Kang, T. Chen, W. W. Zhang, L. H. Liu, Y. Y. Li
Summary: A novel powder metallurgy strategy has been developed to overcome the room-temperature brittleness of pressureless sintered titanium matrix composites by evading Kirkendall's pores. By coating nanosized TiB2 powder with stearic acid and reactive sintering with micron-sized TiH2 powder, TiBw/Ti composites with nearly full density and low porosity have been prepared, exhibiting large tensile plasticity and high strength comparable to or even superior to some ceramic phase-reinforced pure Ti matrix composites.
Article
Materials Science, Multidisciplinary
Jian Lv, Cong Zhang, Weibin Zhang, Jianzhan Long, Yang Yue, Zhenghui Zheng, Yong Du
Summary: The study showed that Ti(C, N)-based cermets prepared using (Ti, Nb)(C, N) solid-solution powder have superior microstructure and hardness compared to traditional Ti(C, N) + NbC mixtures. In addition, using (Ti, Nb)(C, N) can reduce the thickness of surface binder-rich phases, which is beneficial for improving the surface quality of cermets.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Solomon-Oshioke Agbedor, Hong Wu, Yaojia Ren, Jingbo Liu, Luxin Liang, Qingge Wang, Ian Baker
Summary: In this study, MPEAs with a combination of BCC and FCC phases were prepared using composition optimization, mechanical alloying, and powder sintering. The phase evolution and composition were investigated, and it was found that the addition of Ti could enhance the mechanical properties of the alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Lei Jia, Minghao Hou, Chen Zhang, Jin Xu, Shufeng Li, Zhenlin Lu, Katsuyoshi Kondoh
Summary: Ti(O)-B4C diffusion couples and (TiC + TiB)/Ti(O) composites were prepared to study the accelerated diffusion phenomenon and its influence at beta transition temperatures (beta(t)) of Ti matrix. Results showed that the thickness of reaction products in Ti(O)-B4C reached the maximum when sintered at beta(t), indicating that the alpha/beta transition of Ti matrix accelerated the diffusion of atoms. Additionally, (TiC + TiB)/Ti(O) composites had the highest size and number of reinforcements when sintered at beta(t), but had the lowest flexural strength and plasticity due to interface stripping.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Zaheer Abbas Gilani, Samiullah, H. M. Noor ul Huda Khan Asghar, Muhammad Khalid, Muhammad Suleman, Muhammad Ali Shar, Syed Mansoor Ali, Faisal Iqbal, Abdulaziz Alhazaa
Summary: Praseodymium (III)-doped M-type SrPrxFe12-xO19 hexa-ferrites were synthesized via micro-emulsion process followed by annealing. The effects of praseodymium particles on electrical, magnetic, and dielectric properties were studied. The materials showed potential for applications in high-density recording medium and high-frequency devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Energy & Fuels
Ghazi Aman Nowsherwan, Aurang Zaib, Aqeel Ahmed Shah, Mohsin Khan, Abdul Shakoor, Syed Nizamuddin Shah Bukhari, Muhammad Riaz, Syed Sajjad Hussain, Muhammad Ali Shar, Abdulaziz Alhazaa
Summary: This study focuses on the preparation of TiO2, CdS, and TiO2:CdS composite thin films through thermal evaporation for photovoltaic applications. The suggested materials have excellent optical and electrical properties, which can significantly enhance device efficiency. Various microscopy and spectroscopy techniques were used to investigate the optical, morphological, photoluminescence, and electrical properties. The results indicate that TiO2:CdS is a promising candidate for use as an ETM in PSC with enhanced productivity.
Article
Materials Science, Multidisciplinary
Xin Zhang, Xin Li, Lei Liu, Bo Li, Xiaodong Hou, Deng Pan, Lina Gao, Shufeng Li
Summary: A new alloying strategy is proposed in this study to regulate the weak intrinsic interface and uncontrollable interfacial reaction in carbon nanotubes (CNTs) reinforced aluminum matrix composites (AMCs). The addition of Si element inhibits the interface reaction between Al and CNTs by hindering the dissolution and diffusion of carbon atoms in the Al matrix. The strength of the AMCs is enhanced through grain refinement, dislocation increment, improved wettability and interface bonding, as well as load transfer to CNTs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
A. M. Hassanien, Tariq A. Altalhi, A. A. Atta, Abdulaziz N. AlHazaa, Mohammed Alsawat, Gaber A. M. Mersal, Abdel Majid A. Adam, Moamen S. Refat
Summary: The present study aims to synthesize a new antipyrine derivative and investigate its optical properties. The target compound, dpdp, is obtained through a chemical reaction between 4-aminoantipyrine and malonyl chloride. The synthesized compound is characterized using various techniques such as elemental analysis, FTIR spectroscopy, and NMR. Thin films of dpdp are successfully prepared and their optical properties are studied using different methods.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Biochemistry & Molecular Biology
Abdul Karim Shah, Ghulam Taswar Shah, Aqeel Ahmed Shah, Yeung Ho Park, Ayaz Ali Shah, Mooseok Choi, Shoaib Ahmed, Syed Nizamuddin Shah Bukhari, Ali Dad Chandio, Muhammad Atta Mahar, Muhammad Ali Shar, Abdulaziz Alhazaa
Summary: Nickel-supported hierarchical zeolite catalysts were prepared through a desilication reassembly process and applied in one-pot menthol synthesis. The physicochemical and acidic properties of pure microporous ZSM-5/USY zeolites were significantly improved, resulting in outstanding catalytic activity and menthol selectivity for the Ni/HZ-0.5 M catalyst.
Article
Materials Science, Multidisciplinary
Ali Dad Chandio, Iftikhar Ahmed Channa, Asif Ahmed Shaikh, Shabbir Madad, Syed Bilal Hasan Rizvi, Aqeel Ahmed Shah, Jaweria Ashfaq, Muhammad Ali Shar, Abdulaziz Alhazaa
Summary: This research aims to upgrade indigenous Pakistani iron ore through common metallurgical processes. Magnetic properties of the ore were determined, and high-temperature reduction roasting process and magnetic separation process were used to increase the iron concentration. Results showed that the iron concentration increased from 34 wt. % to 56 wt. % at 900°C temperature, coal-to-ore ratio of 20 wt. %, and 2 hours of reduction time, and magnetic properties were induced.
Article
Chemistry, Physical
Furhaj Ahmed Sheikh, H. M. Noor ul Huda Khan Asghar, Muhammad Khalid, Zaheer Abbas Gilani, Syed Mansoor Ali, Noor-ul-Haq Khan, Muhammad Ali Shar, Abdulaziz Alhazaa
Summary: Cerium (Ce3+) substituted Ni-Co ferrites with face-centered cubic (FCC) spinel structure were synthesized by sol-gel method. The crystalline size ranged from 17.1 to 18.8 nm, and the lattice constant decreased with increasing Ce3+ contents. Fourier transform infra-red (FTIR) spectroscopy showed two characteristic absorption bands. The average particle size was determined to be around 21.83 nm based on field emission transmission electron microscopy (FE-TEM) analysis. Magnetic studies revealed a decrease in saturation magnetization and remanence with Ce3+ substitution, while coercivity initially increased and then followed the trend of anisotropy constant. Dielectric studies showed a decrease in dielectric parameters with frequency and a significant decrease in dielectric loss at high frequency. The Cole-Cole interpretation suggested that the conduction mechanism was caused by grain boundary density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Shaolong Li, Shufeng Li, Lei Liu, Lina Gao, Yabo Fu, Xin Zhang, Bo Li
Summary: Understanding the softening mechanisms of high-temperature titanium alloys is crucial for ensuring their stability and safety at service temperatures. This study investigated the softening behavior and failure mode of high-temperature titanium alloy TA15 at service temperatures. It was found that the size of the coarse prior β grains in TA15 affects its tensile strength, with larger grain sizes leading to lower strength and the occurrence of grain boundary softening and fracture at high temperatures. Increasing the equi-cohesive temperature of the alloy shows promise for improving its service temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Joselito Puzon Labis, Hamad A. Albrithen, Mahmoud Hezam, Muhammad Ali Shar, Ahmad Algarni, Abdulaziz N. Alhazaa, Ahmed Mohamed El-Toni, Mohammad Abdulaziz Alduraibi
Summary: In this paper, a hybrid approach combining pulsed laser deposition (PLD) and RF magnetron sputtering (RFMS) is used to design and synthesize 2D/3D Al2O3-ZnO nanostructures. The optimized parameters of PLD and RFMS are explored to grow ZnO and Al2O3-ZnO nanostructures simultaneously. The grown nanostructures show exceptional properties and have potential applications in optoelectronics and bio/gas sensors.
Article
Materials Science, Multidisciplinary
Xinghua Ji, Shufeng Li, Xin Zhang, Lei Liu, Shaolong Li, Lina Gao, Xin Li, Shaodi Wang
Summary: The problems of SiC particles reinforced AlSi10Mg composites prepared by traditional casting method can be improved by powder metallurgy. This study analyzed the influence of SiC particle size and content on the properties of SiC/AlSi10Mg composites. The obtained composites showed a dense microstructure without interfacial reaction phase. The strength of SiC/AlSi10Mg increased with the increase of nm-SiC content, while the strength hardly changed with the increase of μm-SiC content. The deformation between μm-SiC and AlSi10Mg matrix was not coordinated, leading to interface cracking or μm-SiC fracture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Shaodi Wang, Shufeng Li, Lei Liu, Shaolong Li, Lina Gao, Huiying Liu, Xin Zhang, Bo Li, Biao Chen, Junko Umeda, Katsuyoshi Kondoh, Shengyin Zhou
Summary: The addition of iron element can significantly refine the grain size of the α-Ti matrix and improve the mechanical properties of titanium-based composites, especially the tensile strength and elongation. The improvement in mechanical properties is mainly attributed to solution strengthening, fine grain strengthening, and load-bearing strengthening.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Physics, Condensed Matter
Noor-ul-Haq Khan, Zaheer Abbas Gilani, Muhammad Khalid, H. M. Noor ul Huda Khan Asghar, Gulzar Hussain, Muhammad Ali Shar, Syed Mansoor Ali, Muhammad Azhar Khan, Furhaj Ahmed Sheikh, Abdulaziz Alhazaa
Summary: Ce3+ substituted Co(0.7)Zn(0.3)CexFe(2-x)O(4) spinel ferrites were prepared using the sol-gel route and characterized using various techniques. The synthesized nanoparticles showed a nano-crystallite single-phase structure. TEM analysis revealed random-shaped, sharp-edged nanoparticles. The dielectric loss decreased with increasing frequency and microwave frequency decreased with the increase of Ce3+ ions.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Multidisciplinary Sciences
Lei Liu, Shufeng Li, Deng Pan, Dongxu Hui, Xin Zhang, Bo Li, Tianshou Liang, Pengpeng Shi, Abdollah Bahador, Junko Umeda, Katsuyoshi Kondoh, Shaolong Li, Lina Gao, Zhimao Wang, Gang Li, Shuyan Zhang, Ruihong Wang, Wenge Chen
Summary: In this study, a new strategy for developing titanium matrix composites (TMCs) with a dual-structure is proposed. The TMCs achieve enhanced strength compared to homostructure composites, while maintaining 12.0% elongation comparable to the matrix Ti6Al4V alloys. This is achieved by using a TiB whisker rich region engendered fine grain Ti6Al4V matrix with a three-dimensional micropellet architecture (3D-MPA) as the primary structure and evenly distributed 3D-MPA reinforcements and a TiBw-lean titanium matrix as the overall structure.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Materials Science, Multidisciplinary
Yiming Zhang, Shufeng Li, Shaodi Wang, Deng Pan, Lei Liu, Shaolong Li, Lina Gao, Huiying Liu, Xin Zhang, Bo Li, Shengyin Zhou
Summary: This study developed a self-designed spherical Ti64 powder containing nanosized TiB whisker (TiBw) and used it as feedstock to prepare Ti64-TiBw composites by electron beam melting (EBM). The size characteristics and heat treatment temperature have significant effects on the interface structure and microstructure evolution of the composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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)