Advanced Powder Technology最新文献_第2页

Inside Front Cover (Aims & Scope, Editors) 封面内页（目标与范围，编辑）

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-01 DOI: 10.1016/S0921-8831(24)00380-7

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Full title (Editorial Board Members) 全称（编辑委员会成员）

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-01 DOI: 10.1016/S0921-8831(24)00381-9

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Reactive molecular dynamics analysis of alumina nano-powders under warm compaction process 热压实工艺下氧化铝纳米粉体的反应分子动力学分析

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-31 DOI: 10.1016/j.apt.2024.104702

A.R. Khoei , M. Vafaei Sefti , A. Rezaei Sameti

{"title":"Reactive molecular dynamics analysis of alumina nano-powders under warm compaction process","authors":"A.R. Khoei , M. Vafaei Sefti , A. Rezaei Sameti","doi":"10.1016/j.apt.2024.104702","DOIUrl":"10.1016/j.apt.2024.104702","url":null,"abstract":"<div><div>In this paper, the warm compaction process of alumina ceramic nano-powders is investigated through the molecular dynamics method, emphasizing the impact of nanoparticle size, heating temperature, and confining pressure on the final green product. The study unravels the complexities of the alumina compaction process with a focus on alpha-alumina (α-Al<sub>2</sub>O<sub>3</sub>) based on the reactive force field (ReaxFF). Three distinct stages are performed through the MD analysis of the warm compaction process, i.e. relaxing the nano-powders, increasing the pressure and temperature, and decreasing them to the room conditions. The nano-powders are generated with various sizes of nanoparticles to facilitate a comprehensive exploration of size effect on the compaction behavior. The accuracy of the proposed computational model is verified by comparing the results of the alumina nano-powder warm compaction process with those of experimental data. The optimal hold time is determined for the peak density in the MD analysis of the warm compaction process. The results highlight a nonlinear behavior of heating temperature and pressure on the relative density of the final green product, such that the temperature influence significantly reduces by increasing the pressure. Moreover, the size of nanoparticles is investigated during the warm compaction process of alumina nano-powders; it is shown that the relative density and energy density of the final green product increase by decreasing the size of nanoparticles.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104702"},"PeriodicalIF":4.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Viscosity control of alumina dispersed resin through design of surface modifier by a QSPR-method 通过 QSPR 方法设计表面改性剂控制氧化铝分散树脂的粘度

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-30 DOI: 10.1016/j.apt.2024.104701

Ryosuke Maekawa , Haruna Nakayoshi , Makoto Kawano , Chika Takai

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Behavior of tunable ZnO quantum dots (QDs) stabilized by surfactant-free silica nanofluids in their visible luminescence spectra 不含表面活性剂的二氧化硅纳米流体稳定的可调氧化锌量子点 (QDs) 的可见发光光谱特性

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-28 DOI: 10.1016/j.apt.2024.104697

Tantular Nurtono, Hendrix Abdul Ajiz, W. Widiyastuti, Heru Setyawan

{"title":"Behavior of tunable ZnO quantum dots (QDs) stabilized by surfactant-free silica nanofluids in their visible luminescence spectra","authors":"Tantular Nurtono, Hendrix Abdul Ajiz, W. Widiyastuti, Heru Setyawan","doi":"10.1016/j.apt.2024.104697","DOIUrl":"10.1016/j.apt.2024.104697","url":null,"abstract":"<div><div>This research explores the impact of ZnO quantum dots (QDs) physical characteristics, stabilized by cationic surfactants hexadecyltrimethylammonium bromide (CTAB) and embedded in silica alcogel networks, on their optical properties as photomaterials. Using the sol–gel method with ethanol dispersants, the synthesized ZnO QDs displayed varying optical characteristics based on the stabilizer type. When stabilized with cationic surfactants, the ZnO QDs exhibited photoluminescence (PL) emissions in the visible spectrum, specifically green emission at 536 nm with a band gap energy of 2.31 eV, which closely resembled those of pure ZnO QDs. However, these cationic surfactant-stabilized ZnO QDs demonstrated a significant PL intensity decline of 86 % within the first 24 h, suggesting a limited shelf life. As an alternative, silica nanofluids were utilized as stabilizers within a transparent solid matrix, showing a stabilizing effect on the ZnO nanoparticle size, which remained under 10 nm even as the alcogel composite bulk scaled to micrometer dimensions. This study varied the concentration of ZnO and the pH of silica nanofluids during the ZnO/SiO<sub>2</sub> nanocomposite formation, which significantly influenced the photoluminescence performance, transmittance, and stability. After being storage for 14 days at ambient temperature, the silica-stabilized ZnO QDs remarkably showed a PL emission intensity more than a thousand times higher at a pH 10 of silica nanofluids than ZnO QDs stabilized by the cationic surfactant CTAB. This enhancement underscores the efficacy of silica nanofluids as stabilizers, whose pH can be adjusted to optimize PL emissions within specific visible light spectra, showcasing potential for tailored photomaterial applications.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104697"},"PeriodicalIF":4.2,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effect of calcination temperature on the structural, microstructure, and electrical properties of CeO2 nanoparticles as a solid electrolyte for IT-SOFC application 煅烧温度对作为 IT-SOFC 应用固体电解质的 CeO2 纳米粒子的结构、微观结构和电气性能的影响

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-28 DOI: 10.1016/j.apt.2024.104710

Raj Kumar , Vedika Yadav , Pinki Singh , Piyush K. Sonkar , Upendra Kumar , Satyendra Singh

{"title":"Effect of calcination temperature on the structural, microstructure, and electrical properties of CeO2 nanoparticles as a solid electrolyte for IT-SOFC application","authors":"Raj Kumar , Vedika Yadav , Pinki Singh , Piyush K. Sonkar , Upendra Kumar , Satyendra Singh","doi":"10.1016/j.apt.2024.104710","DOIUrl":"10.1016/j.apt.2024.104710","url":null,"abstract":"<div><div>This article comprehensively discusses the effect of calcination temperatures such as 400 °C, 600 °C, and 700 °C of the single-phase ceria oxide (CeO<sub>2</sub>) nanoparticles synthesized via sol–gel chemical root. The first principle calculation performed on the cubic fluorite structure of ceria oxide shows Ce(5d) and O(2p) contributed to the indirect band gap n-type semiconducting response. The structural studies also show the crystallization of CeO<sub>2</sub> in the cubic structure with a gradual change in crystallite size, dislocation density, and micro-strain with temperature. The stretching vibration of Ce–O at 437 and 541 cm<sup>−1</sup> in the Fourier-transform infrared (FTIR) spectrum reconfirms the monophasic nature of the obtained samples. The morphology of the sintered pellets is strongly affected by varying calcination temperatures, such as lower-temperature calcined materials containing larger grains and vice versa. The X-ray photoelectron spectroscopy (XPS) studies show oxygen vacancies and Ce’s mixed states in Ce<sup>3+</sup>/Ce<sup>4+</sup>. Arrhenius-type transport behavior was reflected through DC conductivity analysis that reveals the two conduction regions: electrons through Ce’s degenerate sites in the region-1 (90–280°C) and oxygen ions in the region-2 (280–410°C). The spectroscopic plots extracted the grain and grain boundary contribution, affecting the electrical properties. The grain boundary has a higher activation energy than the grains due to voids and disordered structures at the interface, similar to DC conduction studies. The sample Ce-4′s blocking factor supports the highest DC conductivity of almost 10<sup>−2</sup> S/cm, close to IT-SOFC solid electrolyte conductivity. Therefore, the present study may open the window to commercialize ceria oxide-based solid electrolytes through grain/grain-boundary engineering in IT-SOFCs.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104710"},"PeriodicalIF":4.2,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Corrigendum to “Investigating the effect of mechanical activation duration (MAD) on the microstructure and corrosion behavior of TiAl intermetallic compounds” [Adv. Powder Technol. 33(4) (2024) 104690] 研究机械活化持续时间 (MAD) 对 TiAl 金属间化合物微观结构和腐蚀行为的影响》[Adv. Powder Technol.

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-25 DOI: 10.1016/j.apt.2024.104711

Alireza Karimi , Mandana Adeli , Makoto Kobashi

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MPFEM investigation on densification and mechanical structures during ferrous powder compaction 铁粉压制过程中的致密化和机械结构的 MPFEM 研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-24 DOI: 10.1016/j.apt.2024.104700

Wei Zhang , Chuanniu Yuan , Weijian Xiao , Xu Gong , Bozhan Hai , Rongxin Chen , Jian Zhou

{"title":"MPFEM investigation on densification and mechanical structures during ferrous powder compaction","authors":"Wei Zhang , Chuanniu Yuan , Weijian Xiao , Xu Gong , Bozhan Hai , Rongxin Chen , Jian Zhou","doi":"10.1016/j.apt.2024.104700","DOIUrl":"10.1016/j.apt.2024.104700","url":null,"abstract":"<div><div>Metal powder compaction is a crucial process in powder metallurgy, significantly affecting the final properties of compacts. However, the quantitative characteristics of multi-scale mechanical structures and the microscopic densification behavior, taking into account the influence of friction conditions, remain unclear. This study utilises a two-dimensional multi-particle finite element method to analyse the ferrous powder compaction. The evolution of powder densification, powder deformation and multi-scale mechanical behaviour under different friction coefficient conditions are analyzed quantitatively and qualitatively. Results reveal that powder densification occurs in distinct stages, with lower friction coefficients promoting greater powder densification, as observed from relative density and coordination number. Additionally, as the axial strain increases, plastic strain gradually rises whilst roundness decreases. Higher friction coefficients are associated with higher equivalent plastic strain but lower powder roundness. The Von Mises stress exhibits different stages of increase with the increment of axial strain. Powders with lower friction coefficients exhibit lower levels of Von Mises stress. As axial strain increases, the number, length, strength and direction coefficient of force chains undergo different evolution processes. Force chains exhibit longer length, fewer numbers, lower strength and lower direction coefficients at lower friction coefficients.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104700"},"PeriodicalIF":4.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Development of design method for wet stirred ball milling by simulation using DEM 利用 DEM 仿真开发湿式搅拌球磨设计方法

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-22 DOI: 10.1016/j.apt.2024.104689

Kizuku Kushimoto , Akira Kondo , Takahiro Kozawa , Makio Naito , Junya Kano

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Microwave absorption of FeCo-C core–shell nanoparticles with tunable thickness of C shells and the underlying mechanism C壳厚度可调的FeCo-C核壳纳米粒子的微波吸收及其机理

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-22 DOI: 10.1016/j.apt.2024.104694

Daitao Kuang , Shiliang Wang

{"title":"Microwave absorption of FeCo-C core–shell nanoparticles with tunable thickness of C shells and the underlying mechanism","authors":"Daitao Kuang , Shiliang Wang","doi":"10.1016/j.apt.2024.104694","DOIUrl":"10.1016/j.apt.2024.104694","url":null,"abstract":"<div><div>In order to address the key question of how the thickness of the C shell affects the microwave absorption properties of metal-C core–shell nanoparticles, FeCo-C core–shell nanoparticles, with identical metal cores but varied carbon shell thicknesses, were synthesized by simply annealing FeCo-C core–shell nanoparticles in air. The free electronic-polarization theory was employed, and thus the polarization storage dependence of the loss plot, <em>i.e.</em>, <span><math><mrow><msubsup><mi>ε</mi><mrow><mi>p</mi></mrow><mo>′</mo></msubsup><mo>-</mo><msubsup><mi>ε</mi><mrow><mi>p</mi></mrow><mrow><mo>\"</mo></mrow></msubsup></mrow></math></span> was introduced to elucidate the underlying microwave absorption mechanism. It was found that permittivities, conduction and polarization losses degrade as the carbon shell becomes thinner. Meanwhile, the thickness of the C shells was well adjusted to tune the magnetic resonance frequencies and intensities of the nanoparticles. Notably, a thicker C shell enhances the complete polarization relaxation process and increases polarization loss. Due to optimal dielectric and magnetic properties, FeCo-C nanoparticles exhibit an optimal reflection loss value up to −72.2 dB and an effective absorption bandwidth of 7.6 GHz at 3.5 mm. These results indicate that the synthesized FeCo-C core–shell nanoparticle is a promising candidate for microwave absorption applications. Furthermore, the introduction of <span><math><mrow><msubsup><mi>ε</mi><mrow><mi>p</mi></mrow><mo>′</mo></msubsup><mo>-</mo><msubsup><mi>ε</mi><mrow><mi>p</mi></mrow><mrow><mo>\"</mo></mrow></msubsup></mrow></math></span> plot is expected to have a significant impact on the field of microwave absorption.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104694"},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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