Article
Materials Science, Multidisciplinary
Zhao Shang, Qianwei Zhang, Jun Shen, Haiqiang Bai, Xiaowan Dong, Wenfang Bai, Lisheng Zhong, Gang Liu, Yunhua Xu
Summary: The effects of adding Nb and Ti and heat treatment on the microstructure evolution and hardness of NiAl-Cr(Mo) alloy were investigated. The addition of Nb and Ti increased the hardness of the alloy, with a further increase in hardness as Nb content increased. Directionally solidified alloys exhibited higher hardness compared to as-cast alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Qi Wang, Xiaowei Wang, Ruirun Chen, Dezhi Chen, Tianyu Zhao, Qin Xu, Yanqing Su
Summary: The addition of different alloy elements can lead to changes in the microstructure and fracture toughness of Nb-16Si-22Ti alloys. Among them, the Nb-16Si-22Ti-8Cr alloy has the maximum fracture toughness of 13.4 MPa m(1/2).
Article
Materials Science, Multidisciplinary
Guangxin Sun, Lina Jia, Zhen Hong, Guangxu Liu, Hu Zhang
Summary: The effects of Cr, Al, and B on the microstructure and high-temperature oxidation behaviors of Nb-Ti-Si based alloys were studied. Among the three elements, Al and Cr were beneficial to oxidation resistance at 1200°C, while B was favorable at 1300°C. The ratio of these alloying elements may play a significant role in enhancing oxidation resistance.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
J. Ibanez-Perez, M. L. No, M. Oehring, H. Clemens, J. M. San Juan
Summary: This study demonstrates the hindering effect of Nb on the diffusion of Ti atoms in the α(2)-Ti3Al phase through mechanical spectroscopy measurements, with the activation energy increasing with Nb content. The mechanism of next-neighbor interaction of Nb atoms with the local configuration of Ti-V-Ti is proposed to explain the observed experimental behavior, leading to a further broadening of the relaxation peak.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xin Yang, Zhiqiang Fu, Weiping Chen, Shanqing Li, Hao Wang, Sheng Guo, Enrique J. Lavernia
Summary: Ti40Nb25Cr15Mo10Al10 and Ti40Nb20Cr20Mo10Al10 refractory high-entropy alloys (RHEAs) were designed with superior combinations of high-temperature mechanical properties, corrosion and tribo-corrosion resistance in molten aluminum. The low solubility of constituent elements and slow diffusion of Al atoms in RHEAs' matrices contribute to their outstanding corrosion resistance. The exceptional tribo-corrosion resistance of RHEAs is attributed to their combination of corrosion resistance and high-temperature mechanical properties, while higher Cr content leads to inferior tribo-corrosion resistance.
Article
Nanoscience & Nanotechnology
S. Zeisl, A. Lassnig, A. Hohenwarter, F. Mendez-Martin
Summary: The influence of severe plastic deformation on the hardness and precipitation behavior of a Co-free maraging steel was investigated in this study. It was found that severe plastic deformation transformed the microstructure, delayed austenite reversion, and accelerated and influenced the precipitation reaction, thus affecting the characteristics of intermetallic phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Peter Staron, Andreas Stark, Norbert Schell, Petra Spoerk-Erdely, Helmut Clemens
Summary: Intermetallic gamma-TiAl-based alloys are lightweight materials suitable for high temperature applications, capable of replacing heavier Ni-based alloys. These alloys consist of three crystallographic phases that transform into each other at different temperatures.
Article
Materials Science, Multidisciplinary
L. Charpentier, A. Kauffmann, E. Beche, C. Escape, S. Laube, D. Schliephake, J. Esvan, B. Gorr, A. Soum-Glaude, M. Heilmaier
Summary: This study discusses how the oxidation of refractory element-based alloys affects their optical properties, specifically through changes in surface composition and roughness. The results show that the oxidation process significantly increases the spectral emissivity of the samples. The oxidized TMCA and TMCTA alloys exhibit a higher solar absorptivity compared to state-of-the-art Ni-based alloys used in solar power plants, making them promising candidates for solar thermal energy conversion applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Kan Chen, Ruizhi Zhang, Jan-Willem G. Bos, Michael J. Reece
Summary: The successful synthesis of a single-phase high-entropy half-Heusler compound through mechanical alloying and spark plasma sintering allows for a homogeneous distribution of multiple elements in the samples. The stability of the samples, as well as the ability to exhibit both n-type and p-type semiconductor behavior by adjusting the Fe/Co ratio, indicate the promising potential of the high-entropy concept in extending composition range and tuning thermoelectric properties for half-Heusler materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Sergey Grigoriev, Alexey Vereschaka, Filipp Milovich, Nikolay Sitnikov, Nikolay Andreev, Jury Bublikov, Natalya Kutina
Summary: The article discusses the properties of a multi-layer composite coating with a nanostructured wear-resistant layer, analyzes structure and phase composition, performs cutting tests comparing different coatings, focuses on wear patterns, diffusion processes, and nanolayer structure, and examines the influence of Fe content and crack propagation.
Article
Chemistry, Physical
Serhii Teslia, Anatoliy Stepanchuk
Summary: In this study, Al-15 wt % Fe powders were prepared using two methods and the effects of milling time and temperature field distribution during atomization on the morphology and microstructure were investigated. It was found that centrifugal atomization resulted in a microstructure with reinforcing effects, consisting of alpha-Al-matrix, stable Al13Fe4, and randomly oriented short fibres of metastable Al6Fe.
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
Engineering, Mechanical
Josue Quintero-Ortiz, F. V. Guerra, Arnoldo Bedolla-Jacuinde, Carlos Alberto Leon-Patino, Jose Sergio Pacheco-Cedeno
Summary: The effect of boron and carbon additions on the microstructure and wear performance of a Co-30Cr-5Mo alloy was analyzed in this study. The addition of 0.5 wt% B and C modified the microstructure and resulted in a 37% vol of reinforcing phases composed of M23C6 carbides and M3B2 borides. The alloy exhibited excellent wear properties with a network-like microstructure and hardness values between 43 and 48 HRC.
Article
Chemistry, Physical
Tophan Thandorn, Panos Tsakiropoulos
Summary: This paper investigates the effects of boron addition on metallic ultra-high temperature materials, comparing refractory metal intermetallic composites with different alloys. The addition of boron was found to improve specific strength at room temperature and enhance oxidation resistance at high temperatures, showing promising potential for applications in extreme environments.
Article
Nanoscience & Nanotechnology
P. A. Loginov, Yu Yu Kaplanskii, G. M. Markov, E. Patsera, K. V. Vorotilo, A. Korotitskiy, N. Shvyndina, E. A. Levashov
Summary: In this study, Ti-Al-Nb-Mo-B alloy was successfully produced using high-energy ball milling, self-propagating high-temperature synthesis, and hot isostatic pressing techniques. Different types of microstructure and homogeneous distribution of components were achieved through high-energy ball milling. The preferential deformation mechanism of the studied alloy was found to be mechanical twinning.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Anil Kumar Singh, Zafar Neyaz, Ritu Verma, Anshul Gupta, Richa Mishra, Prabhakar Mishra
Summary: This study retrospectively analyzed 86 patients who underwent CT-guided biopsy of retroperitoneal lesions, with a high technical success rate and diagnostic yield of 91.9%. Major disease categories identified were lymphoma, tuberculosis, and metastases. Imaging findings overlapped but also exhibited common features specific to certain diseases.
Article
Engineering, Electrical & Electronic
K. K Bindu, S. Rajbala, Girish Kumar, Anil K. Singh
Summary: This paper proposes a technique using directly coupled stacked patches to increase impedance bandwidth and reduce cross-polarization. By employing metallic shorting posts between the metallic patches, the stacked configurations achieve a bandwidth of 25.8% and a gain of 8.8 dBi with low cross-polarization levels. A symmetrically direct-coupled stacked design further suppresses cross-polar components, resulting in a bandwidth of 26.1% and a gain of 9.3 dBi.
IETE JOURNAL OF RESEARCH
(2023)
Article
Energy & Fuels
Vallu Ramakrishna, Ashok K. Singh, G. K. Bayen, R. E. Masto, R. K. Meena, Pradeep K. Singh, M. Arya, S. Jyoti, Arnold L. Usham
Summary: Torrefaction is an important process to improve the fuel properties of agro-waste. In this study, palmyra palm shell and redgram stalk were torrefied at different temperatures and residence times. The results showed that increasing the torrefaction temperature increased the fixed carbon content, high heating value, and energy density of the fuel, while reducing its mass and energy yield. The torrefied biomass also had improved grindability and reduced moisture reabsorption tendency compared to the raw agro-wastes.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Materials Science, Multidisciplinary
Ashutosh Panchal, T. K. Nandy, A. K. Singh
Summary: A slurry-based technique has been developed for manufacturing porous nickel structures for capillary pumping systems, requiring porosity levels higher than 40% and pore size diameter lower than 20 mu m. Irregular open pores are observed in sintered blanks, with porosity level and volume shrinkage decreasing and increasing with sintering temperature increase. Compressive flow stress-strain curves exhibit three regions, including elastic modulus, plastic yield, and densification, with higher sintering temperatures leading to decreased porosity levels and increased plateau and densification stress.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Article
Engineering, Aerospace
Gaurish Tripathi, S. B. Singh, Sanjay Kumar, Ashutosh K. Singh, Rajesh Singh, A. K. Singh
Summary: This study examines the variability of ionospheric electron density in the low latitude region during a solar eclipse event using observations of VLF transmitter signals and Tweeks phenomena. Analysis during the solar eclipse on June 21, 2020, reveals changes in ionospheric reflection heights and electron density in the D-region, as well as modifications in VLF transmitter signals. Traveling ionospheric disturbances and atmospheric gravity waves induced by the eclipse are also observed.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Chemistry, Applied
Pratistha Singh, Renuka Ranjan, Ruchita Tripathi, Jyoti Dixit, Neeraj Sinha, Anil Kumar Singh, Kavindra Nath Tiwari
Summary: This study identifies the metabolite profiles of Panchvalkal kwath (PK) and reveals its efficacy in treating various diseases, as well as the presence of three new compounds in the formulation.
NATURAL PRODUCT RESEARCH
(2023)
Article
Oncology
Sung Jun Ma, Lucas M. Serra, Brian Yu, Mark K. Farrugia, Austin J. Iovoli, Han Yu, Song Yao, Oluwadamilola T. Oladeru, Anurag K. Singh
Summary: This study examined the trends and variations in pathologic complete response (pCR) for breast cancer among different racial/ethnic groups. Using a national cancer database, the study found that pCR rates improved over time for all groups, but there were significant differences in rates and survival outcomes. Further investigations are needed to optimize outcomes for underserved populations.
Article
Oncology
Steven E. Schild, Xiaofei Wang, Christine M. Bestvina, Terence Williams, Greg Masters, Anurag K. Singh, Thomas E. Stinchcombe, Joseph K. Salama, Steven Wolf, Tyler Zemla, Narjust Duma, Stephen G. Chun, Arya Amini, David Kozono, Colleen Watt
Summary: This study aims to determine if stereotactic body radiation therapy (SBRT) added to systemic therapy can significantly improve outcomes for patients with advanced stage non-small cell lung cancer (NSCLC) without PD-L1 protein expression. The trial will compare SBRT plus systemic therapy with systemic therapy alone and evaluate progression-free and overall survival. This multi-institutional trial will provide further insight into the efficacy of combining SBRT with systemic therapy.
CLINICAL LUNG CANCER
(2022)
Article
Computer Science, Information Systems
Pooja Chaudhary, Brij B. Gupta, A. K. Singh
Summary: This research work focuses on developing an approach to defend against XSS attacks in the Internet of Things (IoT) system and protect the security of embedded devices. By identifying and filtering attack strings, this method effectively mitigates the harm caused by XSS attacks in intelligent IoT systems.
COMPUTERS & SECURITY
(2022)
Article
Horticulture
Sandhya Thapa, Kalyan Barman, Anil K. Singh
Summary: The study found that postharvest putrescine (PUT) treatment has significant effects on delaying senescence and maintaining quality of guava fruits. Among the different doses of PUT treatment, 1.0 mM was the most effective in reducing weight loss and decay of the fruits.
Article
Computer Science, Information Systems
Deepika Saxena, Ishu Gupta, Jitendra Kumar, Ashutosh Kumar Singh, Xiaoqing Wen
Summary: The SM-VMP framework proposes an efficient virtual machine allocation solution that saves resources, reduces costs, and enhances security. Through the WOGA algorithm, efficient VM migration and optimization are achieved. The framework shows significant performance improvements in both static and dynamic VMP, including reducing the number of shared servers, lowering intercommunication costs, saving energy consumption, and reducing execution time.
IEEE SYSTEMS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
P. Anil Kumar, J. Vanaja, G. V. Prasad Reddy, G. V. S. Nageswara Rao
Summary: In this study, India specific reduced activation ferritic martensitic (INRAFM) steel was subjected to thermomechanical treatment (TMT) to improve its microstructural characteristics, hardness, and tensile properties at elevated temperatures. The results showed that tempering at 1033 K in TMT1 condition significantly enhanced the hardness, tensile strength, and ductility of the steel due to microstructural refinement. However, tempering at 1063 K in TMT2 condition diminished the beneficial effects of TMT due to the coarsening of precipitates and the annihilation of dislocation structure. The TMT processed INRAFM steel shows great potential for nuclear fusion reactor applications.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Umme Thahira Khatoon, Aditya Velidandi, G. V. S. Nageswara Rao
Summary: This study reports a simple and economic method for the synthesis of nano-sized silver particles, which showed effective antimicrobial activity and low cytotoxicity. These silver nanoparticles can be potentially used as antimicrobial agents in biomedical applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
P. Anil Kumar, J. Vanaja, G. V. Prasad Reddy, G. V. S. Nageswara Rao
Summary: The present study investigated the influence of thermomechanical treatment (TMT) on the microstructural evolution and creep deformation behavior of India specific reduced activation ferritic martensitic (INRAFM) steel. TMT treated steel showed refinement in lath structure and an increase in the population of finer precipitates, leading to enhanced creep resistance. Norton's power law was used to describe the dependence of minimum creep rate on applied stress, and the modified Monkman-Grant relation showed a good correlation between rupture time/strain to failure and minimum creep rate. TMT treated steel also exhibited lower rate of exhaustion, higher threshold stress, and prolonged tertiary creep region.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Jolly Kaushal, Siddhant Singh, Divyanshu Nautiyal, Gyandshwar Kumar Rao, Ajai K. Singh, Arun Kumar
Summary: This article reviews the synthesis methods and applications of organoselenium ligands in transition metal catalytic systems. It focuses on the application of click chemistry in the synthesis of selenium-containing compounds and its advantages over other synthetic approaches. Additionally, it discusses the use of these ligands in various chemical transformations and analyzes the relationship between catalytic performance and structural difference in ligand architecture.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Ping Zhang, Xiujie Yue, Yeran Gao, Zhenyong Lin, Shunxiang Wang, Songting Zhang
Summary: This paper investigates the strengthening mechanism of highspeed cutting and solid particle-entrained waterjet peening (HSC-WJP) composite reinforcement on 7075-T6 aluminum alloy. The research results show that composite reinforcement can improve surface quality, reduce surface pits and roughness, and decrease the size of precipitation-free zone (PFZ) at grain boundaries.
Article
Materials Science, Multidisciplinary
Sangyoon Lee, Hwi Yoon, Sanghun Lee, Seung-min Chung, Hyungjun Kim
Summary: The wettability of metal oxides, particularly HfO2 thin films deposited via atomic layer deposition, and its correlation with surface free energy have been studied. It was found that surface oxygen species significantly affect the intrinsic hydrophilicity of HfO2 thin films, and the crystalline orientations also evolve with film thickness.
Article
Materials Science, Multidisciplinary
Changdong Yin, Yiwen Wu, Zhou Xu, Dongdong Ye, Jun Yao, Jianjun Chen, Qiang Liu, Xin Ge, Meiling Ding
Summary: This study proposed a new strategy to indirectly estimate the hydrogen diffusivity of metallic materials under tensile stress by combining the electrochemical hydrogen permeation test (EHPT), the hydrogen diffusion descriptive equation based on Fick's law, and hydrogen pre-charged tensile test. The results showed that the hydrogen permeation curve obtained was highly approximate to the theoretical trend. The hydrogen embrittlement (HE) susceptibility of the specimens increased with increasing stress.
Article
Materials Science, Multidisciplinary
Huan Luo, Wei-yi Wang, Xin Yu, Xian-jun Lei, Lang Liu, Guo-zheng Zha, Wen-long Jiang, Bin Yang, Bao-qiang Xu
Summary: Separating selenium and tellurium is a general challenge in material and non-ferrous metallurgical industries. This paper proposes a novel method that achieved efficient separation of selenium and tellurium using gas-liquid equilibrium phase diagram and valence regulation-vacuum gasification technique.
Article
Materials Science, Multidisciplinary
Fan Zhang, Rong Xin Wang, Aiqin Tian, Fangzhi Li, Jianping Liu, Hui Yang
Summary: Deposition of Pd/Pt/Au three-layer films on p-GaN under high and ultra-high vacuum conditions was studied to investigate the electrical contact properties. Linear I-V curves were observed in samples deposited under ultra-high vacuum conditions, while nonlinear I-V characteristics were obtained in samples deposited under high vacuum conditions. The study also found that the samples deposited under high vacuum conditions had higher amounts of oxygen and Pd oxide. The oxide layer had an additional influence on the electrical characteristics of the Pd/Pt/Au/p-GaN contact.
Article
Materials Science, Multidisciplinary
Hongli Liu, Chengzhe Liu, Ying Sui, Zhongxian Liu, Tiangang Zhang, Zhiqiang Zhang, Shuang Sun, Jianwei Jia
Summary: This study utilized polysiloxane and hafnium carbide to produce Si-N-C-O-Hf hybridized ceramic fibers, and obtained ceramic fibers with hemispherical particles on the surface through electrostatic spinning and pyrolysis. The ceramic fibers exhibited excellent thermal stability, oxidation resistance, and high temperature insulation.
Article
Materials Science, Multidisciplinary
M. Abaker, Nazar Elamin Ahmed, A. Saad, H. F. Khalil, E. M. M. Ibrahim, A. M. Adam
Summary: This paper systematically studied the internal structure and thermoelectric properties of In1-xGaxSb alloys prepared by melting synthesis at 1123 K. The results showed that doping with Ga in the In sites led to a significant increase in the Seebeck coefficient and power factor, while reducing the thermal conductivity. The maximum dimensionless figure of merit was observed at 403 K.
Article
Materials Science, Multidisciplinary
Fucheng Yu, Jinlong Ren, Jielin Zhang, Haiyang Chen, Xin Tian, Chenchen Feng, Cuixia Li, Jianbin Zhang, Xianxi Tang, Xiaogang Hou
Summary: An environmentally friendly ZnO@BiVO4 composite photocatalyst was prepared using in-situ self-assembly and solvothermal methods, demonstrating good photocatalytic performance. The mass ratio of BiVO4 and NCZ was found to influence the photocatalytic performance of the composite.
Article
Materials Science, Multidisciplinary
Yaoming Shao, Pingping Zheng, Tianhao Dong, Lianghuan Wei, Haifei Wu, Jianxiao Si
Summary: In this paper, Mg3Bi2 films were prepared on glass substrate using magnetron sputtering, and the phase composition and thermoelectric properties of the films were investigated with different atomic ratios. The films displayed a metastable cubic phase and high conductivity when the atomic ratio exceeded stoichiometry.
Article
Materials Science, Multidisciplinary
I. V. Uimanov, D. L. Shmelev, S. A. Barengolts
Summary: A two-dimensional axisymmetric model has been developed to study the prebreakdown processes in a cathode microprotrusion under an external electric field. The simulation results show that electrohydrodynamic instability leads to the formation of a nanometer-sized conical protrusion on the microprotrusion tip, significantly accelerating the heating process.
Article
Materials Science, Multidisciplinary
Weilun Zhang, Di Yang, Feng Gong, Yongjun Chen, Tian Chen, Zhiwen Xie, Sirui Yang
Summary: A novel Pt doping method was designed to improve the thermal stability of CrWN coating. The doping of Pt atoms effectively blocks the coherent growth of the grains and creates a significant mixing effect, resulting in a smooth surface with uniform element distribution.
Article
Materials Science, Multidisciplinary
Xiaoye Wang, Xiaoguang Yang, Wenna Du, Tao Yang
Summary: In this study, the effects of multiple growth parameters on self-catalyzed growth of InAs/GaSb axial heterostructured nanowires on Si substrate by MOCVD were investigated. It was found that the growth temperature and switching time have significant influences on the nanowire growth.
Article
Materials Science, Multidisciplinary
Weizhong Cui, Yan Zhao, Can Cui, Xing Liu, Beili Pang, Jianguang Feng, Hongzhou Dong, Liyan Yu, Lifeng Dong
Summary: This study introduces Co2+ cations into Cs2AgBiBr6 film to improve its quality, grain size, and conductivity, resulting in enhanced solar cell efficiency.
Article
Materials Science, Multidisciplinary
Jian Wang, Ke Yang, Xianming Cheng, Yalin Lu, Ganghui Wu, Yang Zhang, Yun Kan
Summary: The corrosion behavior and microstructural evolution of Sc microalloyed Al-3.2Cu-1.5Li alloys were investigated in detail. The microstructural results showed higher levels of dislocations density in the Sc microalloyed sample, which resulted in significantly refined grains and T1 precipitates. Microalloying with Sc changed the corrosion mode of the alloy and localized corrosion was found to occur preferentially at the subgrain within unrecrystallized grains with high grain stored energy.
Article
Materials Science, Multidisciplinary
Weifeng Liu, Na Liu, Kaiqiang Song, Meiqin Zeng, Zhongchen Lu
Summary: Monoclinic WO3 prepared through plasma milling exhibits higher photocatalytic activity due to its higher surface area, increased oxygen vacancies, and defects.
