Article
Nanoscience & Nanotechnology
Bharat Sharma, Mukesh Kumar, Vinay Kumar, Ashutosh Sharma
Summary: This study investigated the impact of boron nitride nanotubes (BNNTs) on the microstructural and interconnection reliability of a lead-free solder alloy. The addition of 0.4 wt % BNNTs improved the grain morphology, intermetallic compound thickness, wetting, and spreading of the alloy. The resultant alloy also showed enhanced wetting force and joint shear strength, making it important for microelectromechanical systems packaging.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Hoda Pooshgan, Homam Naffakh-Moosavy
Summary: This study investigates the use of germanium additive in solder alloy to reduce intermetallic layer thickness and improve the strength and toughness of joints.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Ali Karimi, Ali Maleki, Aboozar Taherizadeh, Behzad Niroumand
Summary: This study synthesized a Sn-0.7wt.%Cu/Xwt.%SiO2 nanocomposite solder by angular accumulative extrusion (AAE), which proved to have improved properties compared to the monolithic sample. The addition of silica nanoparticles increased the tensile properties and joint shear strength of the solder, as well as refined the microstructure and decreased undesired intermetallic compound formation. This successful synthesis of the nanocomposite solder by AAE shows its potential for application in the industry.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
T. T. Dele-Afolabi, Masoud Ahmadipour, M. A. Azmah Hanim, A. A. Oyekanmi, M. N. M. Ansari, Surajudeen Sikiru, Niraj Kumar
Summary: The impact of multi-walled carbon nanotubes (MWCNTs) on the development of intermetallic compounds (IMCs) at the interface of Sn5Sb/Cu solder joints was investigated. The presence of MWCNTs significantly prevented IMC formation and enhanced the shear strength of the solder joints. An extreme learning machine (ELM) prediction model refined by Aquila optimizer (AO) was used to accurately predict the IMC thickness and shear strength of the solder joints.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
M. Tamizi, M. Movahedi, A. H. Kokabi, Y. Miyashita, S. Azghandi Rad
Summary: This study examines the effects of dopant nanoparticles, graphene nanosheets, and cobalt decorated-graphene nanosheets on the wettability and rheological behavior of lead-free solder paste. The results show that cobalt decorated-graphene nanosheets improve the wettability and fluidity of the solder, leading to better reactive wetting. Additionally, cobalt decorated-graphene nanosheets form refined compounds with a flat morphology, which further promote wetting reactions at the interface.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Xin Wei, Sa'd Hamasha, Ali Alahmer, Mohamed El Amine Belhadi, Palash Pranav Vyas
Summary: This study investigated the fatigue failure of interconnecting solder joints frequently observed in ball grid array (BGA) components. Through comparing the fatigue results obtained from stress-controlled and strain-controlled tests, it was found that the performance of solder joints with organic solderability preservative (OSP) surface finish outperformed those with electroless nickel-immersion gold (ENIG) surface finish, regardless of the testing process and solder alloy.
MICROELECTRONICS RELIABILITY
(2023)
Article
Engineering, Electrical & Electronic
Zhai Xinmeng, Chen Yue, Li Yuefeng, Zou Jun, Shi Mingming, Yang Bobo, Yang Jie, Qian Qi, Zhang Cheng
Summary: The study shows that smaller solder crystal grains result in better soldering performance, but may lead to a higher void rate. The issue can be addressed by adding highly active flux. After 1000 hours of aging, solder paste with 5-15 μm grain size demonstrates the best performance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Zeyu Yuan, Yujie He, Ruize Wu, Ming Xu, Jun Zhang, Yunqing Zhu, Qiaoli Wang, Weibin Xie, Huiming Chen
Summary: In this study, the addition of trace amount of rare earth Tb in Sn-3.5Ag-0.5Cu solder was found to delay the formation of IMCs and result in thinner IMC layers. The addition of 0.025 wt% Tb improved shear strength and wettability, while slowing down IMC growth, thus extending the reliability of the joint interface and the service life of the solder joint.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Review
Materials Science, Multidisciplinary
Mardiana Said, Nor Azmira Salleh, Muhammad Firdaus Mohd Nazeri, Hatem Akbulut, Soorathep Kheawhom, Ahmad Azmin Mohamad
Summary: This paper focuses on the current developments of Microwave Hybrid Heating (MHH) as a promising alternative soldering method. It presents the characterization of solder joint properties related to MHH and compares them with conventional methods. The findings provide an in-depth understanding of MHH and its potential applications in the electronic packaging sector.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zhipeng Liang, Yanyan Bu, Xiangfu Wang
Summary: In this study, a probability model based on the Monte Carlo method was established to simulate the in-situ crystal growth of Sn-57Bi alloy. The results showed that the coupled growth of two phases in the alloy occurred, with a decrease in lamellar spacing and an increase in growth velocity, as the undercooling increased.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Jing Han, Heng Cao, Zhou Meng, Xuelun Jin, Limin Ma, Fu Guo, Tong An, Ting Wang
Summary: The electromigration mechanism of linear Cu/Sn3.5Ag0.5Bi8.0In/Cu and Cu/Sn3.0Ag0.5Cu/Cu solder joints has been studied, including the crystal orientation and hardness of the solder joints, composition analysis, and the evolution of interfacial intermetallic compound (IMC) during the electromigration process. It was found that the In component reduced the undercooling of the solder joints and the growth of Sn grains at different nucleation sites. The hardness of Sn3.5Ag0.5Bi8.0In solder joints was higher than that of Cu/Sn3.0Ag0.5Cu/Cu solder joints. The growth rate of the IMC layer in Cu/Sn3.5Ag0.5Bi8.0In/Cu solder joints was slower compared to Cu/Sn3.0Ag0.5Cu/Cu solder joints. Preferential dissolution of Cu6Sn5 and rapid consumption of Cu plate were observed during the electromigration process.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Review
Engineering, Manufacturing
N. Ismail, A. Atiqah, A. Jalar, M. A. Bakar, R. A. A. Rahim, A. G. Ismail, A. A. Hamzah, L. K. Keng
Summary: This study reviews the effects of surface roughness on the wettability and intermetallic compound (IMC) layer formation in lead-free solder joints. The research highlights the most significant work undertaken in this area and classifies the studies according to the process followed. The findings emphasize the importance of surface roughness on the properties of lead-free solder materials.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Electrical & Electronic
Milad Hosseini, Behzad Niroumand, Ali Maleki, Hasan Kaser Issa
Summary: Lead-free nanocomposite solders were successfully manufactured in this study. The nanocomposite solder showed a relatively uniform distribution of nanoparticles in the matrix after certain processing, resulting in significant improvements in hardness and strength compared to traditional solder. The wetting angle and electrical resistivity of the nanocomposite solder showed no significant change compared to the monolithic solder. These findings confirm the importance of the studied nanocomposite solder and process in the electronics industry.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Qinghua Wei, Bin Cao, Hao Yuan, Youyang Chen, Kangdong You, Shuting Yu, Tixin Yang, Ziqiang Dong, Tong-Yi Zhang
Summary: This article introduces a method that combines data-driven approach and expert domain knowledge to design and discover structure materials with high strength and high ductility. By using a divide and conquer strategy and a newly developed data preprocessing algorithm, the issue of small size and high noise in material experimental data can be addressed. Machine learning models are used to predict in the segmented sub-domains, and Bayesian sampling is applied for experiment design.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mu-lan Li, Li-li Gao, Liang Zhang, Wei-min Long, Su-juan Zhong, Lei Zhang
Summary: This study found that the addition of 0.6 wt% silicon carbide nanowires can effectively inhibit the growth of intermetallic compounds (IMC) in Sn/Cu and Sn-0.6SiC/Cu solder, reduce the size of IMC grains, decrease the diffusion coefficient of IMC growth, and reduce the formation of cracks in the IMC layer.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Review
Materials Science, Multidisciplinary
Bharat Sharma, Ashutosh Sharma
Summary: Microfluidics, combined with MEMS technology, offers highly specialized solutions for rapid, sensitive, noninvasive analysis and measurements in small-scale devices. Future research should focus on the applications of microfluidics in biosensing.
ADVANCED ENGINEERING MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Neeraj Kumar, Pankaj Chamoli, Mrinmoy Misra, M. K. Manoj, Ashutosh Sharma
Summary: This review article provides an overview of various types of metal nanoparticles (NPs) and magnetic nanoparticles (MNPs), as well as carbon nanostructures, in the fields of drug delivery and bio-imaging. It discusses their applications in phototherapy, radio-therapeutics, gene-delivery, and biotherapeutics, highlighting their potential in medicine. The article also examines the challenges and future perspectives of using NPs as biomaterials in biomedicine.
Article
Materials Science, Multidisciplinary
Mukesh Kumar, Ashutosh Sharma
Summary: In this study, nanocrystalline Ni, Ni-TiN, and Ni90Cu10-TiN coatings were prepared and analyzed for their phase evolution, structure, and morphology using XRD and HRTEM. The elastic modulus, nanohardness, and scratch resistance of the coatings were measured using nanoindentation technique. The results showed that the Ni90Cu10-TiN coatings exhibited the best nanohardness and tribological properties due to the additional TiN additives which enhanced the dispersion hardening of the composite matrix significantly.
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2022)
Review
Materials Science, Multidisciplinary
Mekala Bharath Krupa Teja, Ashutosh Sharma, Siddhartha Das, Karabi Das
Summary: This review provides a comprehensive survey of lead-free solders, their fabrication routes, interfacial reactions, and mechanical properties, with a focus on the potential of nanoparticle-reinforced solders as alternatives and their impact on IMCs.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Bharat Sharma, Mukesh Kumar, Vinay Kumar, Ashutosh Sharma
Summary: This study investigated the impact of boron nitride nanotubes (BNNTs) on the microstructural and interconnection reliability of a lead-free solder alloy. The addition of 0.4 wt % BNNTs improved the grain morphology, intermetallic compound thickness, wetting, and spreading of the alloy. The resultant alloy also showed enhanced wetting force and joint shear strength, making it important for microelectromechanical systems packaging.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Neeraj Kumar, Ashutosh Sharma, Manoranjan Kumar Manoj
Summary: This study investigates the corrosion behavior of boron carbide reinforced Al-Mg-Si matrix composites in different aqueous environments. The results show that the composites exhibit the highest corrosion resistance in NaCl medium, and a protective barrier layer is formed.
Article
Materials Science, Multidisciplinary
Mukesh Madhavi, Mukesh R. Kumar, Jamilur R. Ansari, Vinay Kumar, Sushil Nagar, Ashutosh Sharma
Summary: Multifunctional magnetic composite nanoparticles (NPs) with antibiotics have shown promising antimicrobial properties. In this study, SiO2 coated over Fe3O4 magnetic nanoparticles (MNPs) were prepared and characterized. The results demonstrated good antimicrobial effects and electrochemical sensing capability, suggesting potential applications in the field of biology.
Article
Materials Science, Multidisciplinary
Neeraj Kumar, Mukesh Kumar, Vinay Kumar, Ashutosh Sharma
Summary: Additive manufacturing enables the production of complex geometries with shorter lead times, offering greater design flexibility and reduced machining times compared to traditional methods. However, process control remains a challenge, as non-optimized settings can result in defects, anisotropy, and stress build-up. This survey explores recent advancements and developments in process optimization and control of microstructural heterogeneity and anisotropy of AM-manufactured Ti alloys for aerospace applications.
Article
Metallurgy & Metallurgical Engineering
Sheetal Kumar Dewangan, Cheenepalli Nagarjuna, Hansung Lee, Ashutosh Sharma, Byungmin Ahn
Summary: A preliminary study was conducted to investigate the impact of pressureless sintering on the surface morphology of AlFeCoNi alloy with the addition of Si element. The study aimed to determine the feasibility of achieving densification of high entropy alloys using conventional sintering techniques. The results showed that even with the addition of Si, the high entropy alloys maintained a single-phase BCC structure. Thermodynamic simulation (CALPHAD) was used to predict phase formation, and the effects of sintering temperatures on crystallite sizes and lattice strains were discussed. Densification mechanisms occurring at different sintering temperatures were also analyzed. While porosity was observed, the density of high entropy alloys improved with higher sintering temperatures.
Article
Metallurgy & Metallurgical Engineering
Hansung Lee, Ashutosh Sharma, Minsu Kim, Byungmin Ahn
Summary: This study investigated the effects of Cu addition on AlFeMnTiSi0.75Cux (x = 0, 0.25, 0.5, 0.75, 1.00) high entropy alloys (HEAs) prepared via mechanical alloying and spark plasma sintering. The analysis of the HEA powders revealed a multiphase structure. After sintering at 900°C, the formation of BCC, μ, and L2(1) phases in the densified HEAs was enhanced. The improved microstructural and mechanical properties were observed at the optimal Cu fraction (0.25 molar ratio).
Article
Pharmacology & Pharmacy
Surabhi Kumari, Anuj Nehra, Kshitij Gupta, Anu Puri, Vinay Kumar, Krishna Pal Singh, Mukesh Kumar, Ashutosh Sharma
Summary: The authors developed biocompatible nano-vesicles using graphene oxide (GO) for the targeted release of chlorambucil (CHL) drugs in cancer cells. GO sheets were functionalized with folic acid (FA) molecules to improve controlled release and loading efficiency of CHL. The drug was loaded onto the GO surface through pi-pi stacking and hydrophobic interactions. In vitro release studies showed a pH-dependent release, with faster release at lower pH.
Review
Engineering, Chemical
Madhu Yadav, Mukesh Kumar, Shiwani Chaudhary, Kajal Yadav, Ashutosh Sharma
Summary: Chemiresistors, including zinc oxide-based gas sensors, are widely used for monitoring toxic gases and environmental pollutants. ZnO nanostructures have shown promising performance in detecting toxic gases at room temperature. This review paper provides an overview of the current advances in ZnO nanostructures-based thin films for gas sensors, focusing on the structure and properties of ZnO, processing methods of ZnO nanostructures, and ways to enhance the gas response characteristics of ZnO-based sensors.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Metallurgy & Metallurgical Engineering
Hansung Lee, Minsu Kim, Ashutosh Sharma, Byungmin Ahn
Summary: This study investigated the dry sliding wear behavior of AlSi0.75TiMnFeCux (x = 0, 0.25, 0.5) high-entropy alloys (HEAs) prepared through mechanical alloying (MA) and spark plasma sintering (SPS). The microstructure and phase evolution were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The wear resistance of the HEAs was evaluated under dry air atmosphere using a reciprocating wear monitor. The results showed that the addition of Cu up to 0.25 molar ratio improved the microhardness and wear behavior of AlSi0.75TiMnFeCux HEAs, but beyond that, a mixed adhesive-abrasive wear mechanism dominated.
Article
Materials Science, Multidisciplinary
Karanvir Singh Grewal, Bharat Sharma, Ashutosh Sharma
Summary: Al2O3 coatings were produced on AA6063 substrates by plasma electrolytic oxidation (PEO) using KOH-Na2SiO3 electrolyte. The effect of pulse duty cycle (25%, 60% at J = 0.2 A/cm(2)) on the morphology, nanoindentation, and tribology of PEO coatings was investigated. The results showed that higher pulse duty cycle led to thicker and more porous coatings. The dominant phase was gamma-Al2O3 initially, with the additional presence of mullite and alpha-Al2O3 phases. The nanomechanical and wear results indicated that the microhardness, elastic recovery, and strength of PEO coatings could be controlled by the applied pulse duty cycle.
MRS COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Jae Pil Jung, Jung-Hyun Lee, Ashutosh Sharma
Summary: In this study, copper conducting films were prepared by electroless plating, and the effects of different plating times on microstructure, thickness, adhesion, and electromagnetic shielding effectiveness were investigated. The experimental results showed that the best outcome was achieved with a 30-minute plating time for the pretreated film, which exhibited excellent adhesion and electromagnetic shielding effectiveness.
ACS APPLIED ELECTRONIC MATERIALS
(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)
