Nanoscience and Technology-An International Journal最新文献_第2页

Decisive role of microstrains in the formation of the domain structure in multiwall carbon nanotubes 微应变在多壁碳纳米管畴结构形成中的决定性作用

IF 1.3

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023047253

N. Bobenko, A. Belosludtseva, A. Ponomarev

引用次数: 0

A micro approach to validate the Gurson yield criteria at macro level 在宏观层面验证Gurson屈服准则的微观方法

IF 1.3

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023046472

Ashish Mishra, Ankit Gupta, Harshit Shukla

引用次数: 0

Crack interaction with tilt grain boundaries in brittle fracture of Al Al脆性断裂中裂纹与倾斜晶界的相互作用

IF 1.3

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023047562

D. Kryzhevich, A. Korchuganov, K. Zolnikov

引用次数: 0

A Comparative Study of Aluminum Oxide Nanoparticles Synthesized in Plasma Discharge under Ultrasonic Cavitation and by Laser Ablation 超声空化等离子体放电与激光烧蚀法制备氧化铝纳米颗粒的比较研究

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023049107

Nikolay Bulychev

引用次数: 0

Effect of vacancies and voids defects on the structural and mechanical behavior of tungsten under harsh temperature and pressure conditions 在苛刻的温度和压力条件下，空位和空隙缺陷对钨的组织和力学行为的影响

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023050784

Amir Alivaliollahi, Ghasem Alahyarizadeh, AbdolHamid Minuchehr

{"title":"Effect of vacancies and voids defects on the structural and mechanical behavior of tungsten under harsh temperature and pressure conditions","authors":"Amir Alivaliollahi, Ghasem Alahyarizadeh, AbdolHamid Minuchehr","doi":"10.1615/nanoscitechnolintj.2023050784","DOIUrl":"https://doi.org/10.1615/nanoscitechnolintj.2023050784","url":null,"abstract":": The body-centered cubic transition metal tungsten is frequently used as a pressure calibration material at high temperatures and pressures due to its outstanding mechanical and thermal properties. In this study, molecular dynamics simulations were performed to investigate the behavior of tungsten under harsh temperature and pressure conditions and the impact of fundamental defects, particularly vacancies, and voids, on its physical, structural, and mechanical properties through their correlation with elastic constants. The study also covered mechanical stability, elastic properties, brittleness and ductility, and hardness. The simulations utilized two different embedded atom methods and one modified embedded atom method interatomic potentials. The results show that the fundamental structural characteristics and properties of pure tungsten crystal, including lattice constant, density, cohesive and vacancy formation energies, elastic constants, and moduli in the ground state for all three potentials, are in good agreement with previous experimental and theoretical calculations and results. The calculated results demonstrate that the elastic constants-related properties for defective structures also have the same trend as the perfect crystal. The presence of defects in the crystal causes a decrease in properties at all temperatures and pressures, directly correlated to the fraction of crystal defects. As the percentage of vacancies increases, a further reduction in the elastic constants is observed. Likewise, these findings reveal that the presence of scattered vacancies in the crystal structure causes a more significant decrease in the substance's properties than","PeriodicalId":51672,"journal":{"name":"Nanoscience and Technology-An International Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135611603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On control of velocity of growth of films during magnetron sputtering 磁控溅射过程中薄膜生长速度的控制

IF 1.3

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023048213

E. Pankratov

引用次数: 0

Effect of vacancies and voids defects on the mechanical and thermophysical behavior of tungsten under harsh temperature and pressure conditions 在苛刻的温度和压力条件下，空位和空隙缺陷对钨的机械和热物理行为的影响

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023048416

Amir Alivaliollahi, Ghasem Alahyarizadeh, AbdolHamid Minuchehr

{"title":"Effect of vacancies and voids defects on the mechanical and thermophysical behavior of tungsten under harsh temperature and pressure conditions","authors":"Amir Alivaliollahi, Ghasem Alahyarizadeh, AbdolHamid Minuchehr","doi":"10.1615/nanoscitechnolintj.2023048416","DOIUrl":"https://doi.org/10.1615/nanoscitechnolintj.2023048416","url":null,"abstract":"In this study, the thermodynamic properties and anisotropic factors of perfect and defective tungsten were investigated through their correlation with elastic constants. The study examined sound velocities, Debye temperature, minimum thermal conductivity, melting point, and elastic anisotropy factors at various temperatures and pressures. The utilized elastic constants were calculated by molecular dynamics simulations. We used three different interatomic potentials in the simulations involving two embedded atoms and one modified embedded atom method. The findings indicated that temperature and pressure were positively correlated with anisotropic factors, with increased values leading to an increase in metal anisotropy. Also, defects were found to cause an increase in anisotropy, with a single vacancy having a greater impact on elastic anisotropy compared to a central void in the crystal structure. The study also found that the fundamental thermodynamic characteristics of pure tungsten crystal including density, sound velocities, Debye temperature, and Grüneisen parameter in the ambient conditions for all three potentials were in good agreement with previous experimental and theoretical calculations. The results showed that defective structures displayed the same trend as perfect crystals for elastic constant-related properties. The presence of defects in the crystal caused a decrease in thermodynamic properties at all temperatures and pressures, with the degree of decrease directly correlated with the fraction of crystal defects. The study also found that the minimum thermal conductivity as a key parameter of tungsten showed a downward trend with temperature and upward","PeriodicalId":51672,"journal":{"name":"Nanoscience and Technology-An International Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135263982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HALL CURRENT AND LUBRICATION EFFECTS ON MULTIPHASE FLOWS OF NON-NEWTONIAN THROUGH AN INCLINED CHANNEL WITH FLEXIBLE WALLS 非牛顿流体多相流动的霍尔电流和润滑效应

IF 1.3

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.v14.i4.40

M. Nazeer, Sadaf Anila, H. Bibi, Zulfiqar Ali, M. Nazir

{"title":"HALL CURRENT AND LUBRICATION EFFECTS ON MULTIPHASE FLOWS OF NON-NEWTONIAN THROUGH AN INCLINED CHANNEL WITH FLEXIBLE WALLS","authors":"M. Nazeer, Sadaf Anila, H. Bibi, Zulfiqar Ali, M. Nazir","doi":"10.1615/nanoscitechnolintj.v14.i4.40","DOIUrl":"https://doi.org/10.1615/nanoscitechnolintj.v14.i4.40","url":null,"abstract":"The effects of heat transfer rate on the motion of round shape solid particles through a non-Newtonian fluid due to peristaltic waves have been investigated in this theoretical study. The governing equations for the current flow problems are modeled for fluid and particle phases by using the continuity, momentum, and energy equations with the help of long wavelength approximation and creeping flow regime. The momentum equations are updated with the addition of Hall current and porous medium terms to capture the effects of Hall current and porous medium parameters, while the energy equation is extended for the thermal radiation effects on the current flow phenomena. The coupled differential equations are solved analytically. The physical quantities are displayed for a wider range of physical parameters; trapping phenomena are also discussed through streamlines contours. The results revealed that the magnitude of trapped bolus reduces dramatically for larger inclinations. The Darcy number diminishes the temperature distribution inside the system. The Hall current parameter enhanced the velocity distribution while the Hartmann number diminished the velocity profile.","PeriodicalId":51672,"journal":{"name":"Nanoscience and Technology-An International Journal","volume":"30 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86161800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative studies on heat transfer performance of nanoaerosols for gas based cooling systems using computational fluid dynamics approach 基于计算流体动力学方法的纳米气溶胶气体基冷却系统传热性能比较研究

IF 1.3

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023047238

V. Khadanga, P. Mishra, S. Mukherjee, Shanta Chakrabarty

引用次数: 0

Nanoscale Heterostructure Concept and III-Sb Element-based Heterostructures for Infrared Applications: A Review 纳米异质结构概念和基于ⅲ- sb元素的异质结构在红外中的应用综述

IF 1.3

Nanoscience and Technology-An International Journal Pub Date : 2023-01-01 DOI: 10.1615/nanoscitechnolintj.2023045593

P. Chaudhary, Amit Rathi

引用次数: 0