Powder Technology最新文献_第10页

Comprehensive analysis of FeMn powder fabricated using ultrasonic atomization technique

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.powtec.2025.120725

Sabrina Alam Khan , Mohammad Reza Vaziri Sereshk , Benjamin D. Nelson

{"title":"Comprehensive analysis of FeMn powder fabricated using ultrasonic atomization technique","authors":"Sabrina Alam Khan , Mohammad Reza Vaziri Sereshk , Benjamin D. Nelson","doi":"10.1016/j.powtec.2025.120725","DOIUrl":"10.1016/j.powtec.2025.120725","url":null,"abstract":"<div><div>Ultrasonic atomization (UA) machines have recently been developed and presented to the market, leading to the need for understanding the characteristics of the produced powders. The current focus in characterizing UA fabricated powders is on assessing flowability, particle size distribution, and powder morphology. However, there is a lack of detailed evaluation of the chemical composition of the fabricated powders, which is crucial in determining the mechanical properties of the parts made from these powders. For the first time, intense Energy Dispersive X-ray Analysis (EDS) was conducted on a substantial number of custom powders of Fe-xMn alloy produced using the UA technique. The powders exhibited a highly spherical shape with a narrow size distribution, primarily within the range of 35–55 μm, making them very promising for 3D printing applications. However, the EDS results indicated that segregation or depletion of Mn occurred during particle formation and is associated with the surface area to volume ratio of the produced powders. When the ratio is greater than 0.1, the particles are entirely depleted of Mn, and an abnormally high concentration of Mn was detected for ratios less than 0.1. We have proposed a schematic model of the UA process during particle formation that takes into account the segregation behavior of Mn based on the particle size of the produced powder.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120725"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427523","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}

引用次数: 0

Improved level set method for particle reconstruction from X-ray computed tomography images

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.powtec.2025.120743

Tingxuan Wang , Wenbin Fei , Krista A. Ehinger , Tom W. Drummond , Guillermo A. Narsilio

{"title":"Improved level set method for particle reconstruction from X-ray computed tomography images","authors":"Tingxuan Wang , Wenbin Fei , Krista A. Ehinger , Tom W. Drummond , Guillermo A. Narsilio","doi":"10.1016/j.powtec.2025.120743","DOIUrl":"10.1016/j.powtec.2025.120743","url":null,"abstract":"<div><div>The heat and fluid flow properties of granular materials are largely controlled by their 3D microstructures. With recent advancements in image-based network modeling, heat transfer and fluid dynamic physics can be effectively simulated. Model accuracy depends on precise 3D reconstruction of particles from X-ray computed tomography (XRCT) images; however, existing workflows that combine watershed algorithms with level set methods require subjective manual inputs in preprocessing and lack controllability in optimization processes. To address these problems, this work proposes an automated workflow that can achieve high precision in the 3D reconstruction of particles. Oversegmentation instances by the traditional watershed algorithm are eliminated through morphological dilations, providing better inputs for the level set optimization process to lay a solid foundation for particle boundary extraction. The results of the proposed level set method are validated with paired multiresolution images of nearly spherical Ottawa and irregular angular sand. Compared with the current state-of-the-art method, the proposed method consistently and significantly obtains smoother particle boundaries and more accurate particle volumes and interparticle contact areas.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120743"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422294","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}

引用次数: 0

Heterovalent double-site substitution to induce the metal-to-metal charge transfer for yellow ZrSiO4: Bi3+/V5+ pigments

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.powtec.2025.120746

Yuting Gong, Yanru Zhao, Junfu Liu, Chengming Qiu, Yun Gao, Xiaohong Xia, Kevin P. Homewood, Binglong Lei

{"title":"Heterovalent double-site substitution to induce the metal-to-metal charge transfer for yellow ZrSiO4: Bi3+/V5+ pigments","authors":"Yuting Gong, Yanru Zhao, Junfu Liu, Chengming Qiu, Yun Gao, Xiaohong Xia, Kevin P. Homewood, Binglong Lei","doi":"10.1016/j.powtec.2025.120746","DOIUrl":"10.1016/j.powtec.2025.120746","url":null,"abstract":"<div><div>Light extinction from charge transfer transitions can create extremely strong visible-light absorption to produce brilliant inorganic pigments. In this work, a heterovalent pair of Bi<sup>3+</sup> and V<sup>5+</sup> is incorporated into ZrSiO<sub>4</sub> to replace both the Zr<sup>4+</sup> and Si<sup>4+</sup> sites to obtain new yellow pigments of ZrSiO<sub>4</sub>: Bi<sup>3+</sup>/V<sup>5+</sup> (referred to as ZS: BiV). By comparison with the conventional yellow BiVO<sub>4</sub> and blue ZrSiO<sub>4</sub>:V<sup>4+</sup> pigments and several ZrSiO<sub>4</sub>: M<sup>3+</sup>/V<sup>5+</sup> (M = Sc, Al, B and Y) powders, it is confirmed that the coloration of the ZS: BiV pigments originates primarily from the metal-to-metal charge transfer (MMCT) from Bi-6 s to V-3d and not from the ligand-to-metal charge transfer (LMCT) from O-2p to V-3d. Calculation of the MMCT energies vindicates a lower energy requirement in ZS: BiV than that in BiVO<sub>4</sub>. The DFT calculation and comparison with some analogous compounds further exclude any coloration contribution from the LMCT transition. Furthermore, the ZS: BiV pigments are confirmed to be thermally and chemically stable in ceramic glazes, enabling the application for ceramic decoration at temperatures over 1100 K. The strategy of heterovalent double-site substitution to construct a strong MMCT transition provides a powerful route to create many attractive coloring systems for future applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120746"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422296","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}

引用次数: 0

The electrostatics of a single-particle transported in a bifurcated pipe

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.powtec.2025.120762

Haoyu Liu, Yanlin Zhao, Seng Tian, Jun Yao

{"title":"The electrostatics of a single-particle transported in a bifurcated pipe","authors":"Haoyu Liu, Yanlin Zhao, Seng Tian, Jun Yao","doi":"10.1016/j.powtec.2025.120762","DOIUrl":"10.1016/j.powtec.2025.120762","url":null,"abstract":"<div><div>Electrostatics generation due to particle-wall contact is popularly found in gas-solid systems. The working mechanism is unclear due to the complexity of particle behavior in turbulent pipe flows. This work aims to investigate the working mechanism of electrostatics generated by a single particle in a bifurcated pipe, which includes three parts: a straight part (<em>a)</em>, a bifurcation part (<em>b)</em> and another straight part (<em>c)</em> after the bifurcation. The electrostatics was measured by an induced method together with particle trajectories taken by a high-speed camera. The statistics of particle trajectories indicate that particle-wall collision and particle rolling play the main role in determining the electrostatics generation while they vary much in each part. In part <em>a</em> of the bifurcated pipe, particle rolling distance dominates the electrostatics generation, longer rolling distance and higher electrostatics. In part <em>b</em> of the bifurcated pipe, electrostatics charge generated is dominated by particle-wall collisions rather than particle rolling, which is independent of particle material and particle size. For the whole bifurcated pipe, the electrostatics generation is determined by part <em>c</em>. For all particles tested in this paper, the lowest level of electrostatics generation is at part <em>a</em>, while the highest level is at part <em>c</em> (excluding 5 <em>mm</em> glass bead at part <em>b</em>). The electrostatics generated by glass beads is higher than that by <em>PP</em> particles, and that by spherical <em>PP</em> is higher than that by elliptical <em>PP</em> particle.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120762"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386591","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}

引用次数: 0

Particle production comparison between the conventional and blade-designed two-fluid pressure nozzles via CFD simulation

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.powtec.2025.120747

Che-Hao Hsu , Hong-Ping Cheng , Kuang-Hsiang Liu , Chien-Hsun Lee , Chin-Chi Cheng

引用次数: 0

Investigation of the critical flow velocity for detachment between various hydrophobic glass beads and bubbles in turbulent flow field

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.powtec.2025.120745

Mianyan Yang, Zhijun Zhang

{"title":"Investigation of the critical flow velocity for detachment between various hydrophobic glass beads and bubbles in turbulent flow field","authors":"Mianyan Yang, Zhijun Zhang","doi":"10.1016/j.powtec.2025.120745","DOIUrl":"10.1016/j.powtec.2025.120745","url":null,"abstract":"<div><div>The critical flow velocity required to detach glass beads (soda-lime) of different hydrophobicity from bubbles was investigated. Using a home-made turbulence controlling system to observe the centrifugal motion of glass beads. The results indicated that different flow velocities were achieved by controlling the rotational speed. Different flow velocity indirectly affected the centrifugal acceleration when the centrifugal detachment of glass beads occurred. When the flow velocity exceeded the critical value, the different hydrophobic glass beads and bubble aggregates experienced centrifugal detachment force also reached the critical value. Due to the pinning effect, the more hydrophobic the glass beads attached to the bubbles, the more stable the aggregates formed. It was necessary to increase the flow velocity to enhance the centrifugal detachment force. The three-phase contact line (TPCL) between glass beads and bubbles rapidly slipped and contracted when attachment force was less than detachment force in centrifugal motion. Resulting in a noticeable necking phenomenon that completed the detachment. Meanwhile, the detachment behavior between glass beads and bubbles did not occur at specific locations, but rather randomly. It was depended on the size and strength of the vortex at that location, as well as the stability of attachment between bubbles and various glass beads.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120745"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386590","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}

引用次数: 0

Numerical investigation of a new technique to reduce pipeline elbow erosion employing branching path with flow control of butterfly valves and orifices

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-07 DOI: 10.1016/j.powtec.2025.120761

Ahmadreza Veiskarami, Maysam Saidi

{"title":"Numerical investigation of a new technique to reduce pipeline elbow erosion employing branching path with flow control of butterfly valves and orifices","authors":"Ahmadreza Veiskarami, Maysam Saidi","doi":"10.1016/j.powtec.2025.120761","DOIUrl":"10.1016/j.powtec.2025.120761","url":null,"abstract":"<div><div>A numerical erosion study was performed using Computational Fluid Dynamics (CFD) integrated with a Discrete Phase Model (DPM) on a standard 90° elbow, branch pipe elbow, and the effects of using a butterfly valve and orifice to control the flow. The butterfly control valve was studied at 20°, 40°, 60°, and 80° rotation angles around its axis, as well as at an orifice with a hole plate diameter of 20 %, 40 %, 60 %, and 80 % of the pipe diameter. In this study, the Euler-Lagrange approach was used to model two-phase flow with one-way coupling. After the fluid phase and non-spherical solid particles entered the pipe, the geometry erosion was calculated using the confirmed particle restitution model and erosion model. The numerical results showed that the branching pipe passes 30.9 % of the flow through the branching part, which reduces elbow erosion by 4.7 %. For this purpose, the use of the control valve and the orifice before the elbow increases the passage of the maximum two-phase flow of gas-particles up to 89.7 % and 96.4 %, respectively, in the branching path of the straight pipe. This leads to less impact of particles on the wall of the elbow compared to the complete passage of the flow in the path of the elbow. Therefore, the erosion damage in the elbow part of the branch pipe with 4 cases of the butterfly control valve is 61.1 %, 56.2 %, 24.7 %, and 4.5 % and the branch pipe with orifice 4 cases is 64.8 %, 54.9 %, 46.4 %, and 19.9 % compared to the normal state is reduced, which led to the improvement and replacement of the branching straight pipe path with only the elbow path.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120761"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386592","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}

引用次数: 0

Enhancing packing efficiency in coal water slurry systems through multi-model particle size distribution optimization

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-06 DOI: 10.1016/j.powtec.2025.120729

Binglong Zhao , Baonan Zhou , Zhenpu Chu , Junguo Li , Shunxuan Hu , Changning Wu , Ke Liu

{"title":"Enhancing packing efficiency in coal water slurry systems through multi-model particle size distribution optimization","authors":"Binglong Zhao , Baonan Zhou , Zhenpu Chu , Junguo Li , Shunxuan Hu , Changning Wu , Ke Liu","doi":"10.1016/j.powtec.2025.120729","DOIUrl":"10.1016/j.powtec.2025.120729","url":null,"abstract":"<div><div>This study proposes a comprehensive approach for optimizing particle size distributions (PSDs) in coal water slurry (CWS) systems to enhance packing efficiency (PE). By integrating the Particle Swarm Optimization (PSO) model with PE model and PSD description models, ideal PSDs for single-peak, double-peak, and triple-peak distributions were developed. For the single-peak distribution, the R-R distribution model was applied to describe the PSD. High PE is achieved when the <span><math><msub><mi>d</mi><mi>x</mi></msub></math></span> range falls between 120 and 250 μm, with <span><math><mi>β</mi></math></span> (characteristic parameters) values ranging from 0.7 to 0.85. The shape and PE of the triple-peak distribution closely resemble those of the double-peak distribution, featuring a higher proportion of large particles compared to the single-peak distribution. This suggests that the double-peak distribution is better suited for preparing industrial CWS with a notable presence of large particles. The proposed method offers a practical and efficient approach to optimize PSDs for the preparation of highly concentrated CWS.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120729"},"PeriodicalIF":4.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378714","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}

引用次数: 0

The influence of operational parameters on the axial transport behavior of a bidisperse particle assembly of spherical particles in rotary kilns

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-04 DOI: 10.1016/j.powtec.2025.120739

Haozhi Jie, Fabian Herz

{"title":"The influence of operational parameters on the axial transport behavior of a bidisperse particle assembly of spherical particles in rotary kilns","authors":"Haozhi Jie, Fabian Herz","doi":"10.1016/j.powtec.2025.120739","DOIUrl":"10.1016/j.powtec.2025.120739","url":null,"abstract":"<div><div>In a bidisperse particle system, a mathematical model based on the segregation induced ring-core structure was established and applied to calculate the residence time and the axial velocity of particles of different sizes within a rotary kiln. Additionally, validation experiments were conducted in a pilot-scale rotary kiln using particles of 2 mm and 4 mm size as experimental materials. The entire process was recorded by observing the transport of the tracer particles from the inlet to the outlet. Additionally, the average axial velocity of each type of particle in each region of the kiln can be obtained. At the outlet, the tracer particles were collected and analyzed based on statistics and diffusion theory. The experimental data were converted into residence time distribution (RTD) formulas, and corresponding mean residence time (MRT), variance, axial dispersion (Dz), and Peclet number (Pe) were derived. The MRT obtained from the experiments is in accordance with the results calculated by the mathematical ring-core structure model, thereby proving the effectiveness and accuracy of the mathematical model presented in this paper. Moreover, the influence of the rotary kiln rotational speed, inclination angle, and feed mass flow rate on MRT and RTD is validated by the experiments. Based on the analysis of particle motion within the kiln, the impact of different transversal motion modes on segregation was also verified.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"454 ","pages":"Article 120739"},"PeriodicalIF":4.5,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamics of proppant particle settling within low Reynolds numbers: Roles of particle shape, surface wettability, wall factor, and fluid elasticity

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-02-03 DOI: 10.1016/j.powtec.2025.120741

Facheng Gong , Yimei Chen , Ke Hai , Ludan Zhang , Yuchuan Chang , Shanshan Yao

{"title":"Dynamics of proppant particle settling within low Reynolds numbers: Roles of particle shape, surface wettability, wall factor, and fluid elasticity","authors":"Facheng Gong , Yimei Chen , Ke Hai , Ludan Zhang , Yuchuan Chang , Shanshan Yao","doi":"10.1016/j.powtec.2025.120741","DOIUrl":"10.1016/j.powtec.2025.120741","url":null,"abstract":"<div><div>Characterizing proppant settling in fracturing fluids is essential for optimizing hydraulic fracturing operations. However, the dynamics of proppant settling in viscoelastic fluids within low Reynold numbers remain unclear. In this work, we investigate the settling behavior of real proppants in a narrow space filled with viscoelastic partially hydrolyzed polyacrylamide (HPAM) solutions to quantify the effects of proppant shape, surface wettability, fracture walls, and fluid elasticity on settling dynamics. Experimental results indicate wall factors lower than studies in literature and negligible influence of particle surface wettability on settling despite different contact angles between resin-coated and non-coated proppants. Fluid elasticity reduces the drag on proppants exponentially, which supports an observation that making thicker HPAM solutions does not always lead to slower proppant settling. New correlations of drag coefficient and terminal settling velocities are developed to quantify the effects of wall retardation and fluid elasticity on particle settling in viscoelastic fluids.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"455 ","pages":"Article 120741"},"PeriodicalIF":4.5,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386589","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}

引用次数: 0