Advanced Powder Technology最新文献

Entrainment behavior of iron ore particles in a fluidized bed under varying gas properties 不同气体性质下铁矿颗粒在流化床中的夹带行为

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-27 DOI: 10.1016/j.apt.2025.105073

Min Ji Lee , Haeun Son , Suyoung Kim , Sung Won Kim

{"title":"Entrainment behavior of iron ore particles in a fluidized bed under varying gas properties","authors":"Min Ji Lee , Haeun Son , Suyoung Kim , Sung Won Kim","doi":"10.1016/j.apt.2025.105073","DOIUrl":"10.1016/j.apt.2025.105073","url":null,"abstract":"<div><div>This study investigates the entrainment characteristics of iron ore particles under varying gas properties, considering the low-density gas conditions of reducing agents in a fluidized bed for hydrogen-based iron reduction. Experiments were conducted in a fluidized bed (0.05 m I.D × 3.05 m high) using iron ore particles (125–2800 μm) and gases of different densities. Iron ore particles were characterized by a high fraction of fines smaller than 45 μm (F<sub>45</sub>), which adhered to the surfaces of primary coarse particles. The laser diffraction method effectively evaluated the particle size distribution of iron ore. The total entrainment rate (G<sub>s</sub>) increased with gas velocity (U<sub>g</sub>) and gas density (ρ<sub>g</sub>), with the increase being more pronounced at higher F<sub>45</sub>. The entrainment of coarse particles with terminal velocities (U<sub>t</sub>) higher than a given U<sub>g</sub> was affected by the entrained flow of fine particles. G<sub>s</sub> consistently exhibited an exponential increase with increasing U<sub>g</sub>/U<sub>t</sub> across varying U<sub>g</sub> and gas properties. The size ratio of critical to coarse particles (d<sub>crit</sub>/d<sub>p,coarse</sub>) was identified as a physical factor to interpret the entrainment of adhered fines from coarse particles. A correlation was proposed to predict G<sub>s</sub> by incorporating U<sub>g</sub>/U<sub>t</sub>, Archimedes number, and particle characteristics such as F<sub>45</sub> and d<sub>crit</sub>/d<sub>p,coarse</sub>.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105073"},"PeriodicalIF":4.2,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216933","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

Coadsorption behavior of phosphate and carboxyl groups in superplasticizer on sulfoaluminate cement particles 高效减水剂中磷酸和羧基在硫铝酸盐水泥颗粒上的共吸附行为

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-27 DOI: 10.1016/j.apt.2025.105071

Xinxin Li , Xiao Liu , Lei Lu , Xiaokai Niu , Zhitian Xie , Jianrong Song , Ziming Wang , Suping Cui

{"title":"Coadsorption behavior of phosphate and carboxyl groups in superplasticizer on sulfoaluminate cement particles","authors":"Xinxin Li , Xiao Liu , Lei Lu , Xiaokai Niu , Zhitian Xie , Jianrong Song , Ziming Wang , Suping Cui","doi":"10.1016/j.apt.2025.105071","DOIUrl":"10.1016/j.apt.2025.105071","url":null,"abstract":"<div><div>Conventional superplasticizers are generally applicable to Portland cement but not to sulfoaluminate cement (SAC). In this study, superplasticizers with different ratios of carboxyl to phosphate, which were used acrylic acid (AA), 2-methacryloyloxyethyl phosphate (MOEP), and isobutylene polyethylene glycol (HPEG) as monomers, were synthesized dedicated to SAC. The initial fluidity and fluidity retention of SAC paste containing superplasticizer were tested, and the coadsorption behavior of phosphate and carboxyl groups of superplasticizer on SAC particles was also evaluated. The results showed that PC35PP65 and PC65PP35 exhibited higher fluidity of SAC paste, greater adsorption capacity (2.74 and 5.17 times greater than that of PC100, respectively), higher adsorption binding energy, and stronger complexation with Ca<sup>2+</sup> and Al<sup>3+</sup>. The adsorbed layer thickness and hydrodynamic radius (R<sub>h</sub>) increased with the increase in phosphate group substitution. Moreover, Langmuir, Freundlich, and Temkin adsorption models and kinetic fitting, as well as complexing index, were introduced to clarify the coadsorption mechanism and the synergistic adsorption of carboxyl and phosphate groups on the SAC surface. The aim of this study is to reveal the coadsorption behavior of phosphate and carboxyl groups in superplasticizer on SAC particles and their synergistic effect, which can provide guidance for further research on SAC superplasticizers.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105071"},"PeriodicalIF":4.2,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155355","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

Investigation of sand-geomaterial interface response using fractal theory: particle shape, gradation and surface roughness effects 基于分形理论的砂-岩土界面响应研究：颗粒形状、级配和表面粗糙度效应

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-26 DOI: 10.1016/j.apt.2025.105072

Abdulmuttalip Ari, Suat Akbulut

{"title":"Investigation of sand-geomaterial interface response using fractal theory: particle shape, gradation and surface roughness effects","authors":"Abdulmuttalip Ari, Suat Akbulut","doi":"10.1016/j.apt.2025.105072","DOIUrl":"10.1016/j.apt.2025.105072","url":null,"abstract":"<div><div>The geometric properties of sand and geomaterials are considered to be the main factors affecting the interface response. The quantitative characterization of geometric parameters will enhance the engineering understanding of the interfaces. In this study, quantification of particle shape, gradation, and surface roughness parameters was performed with fractal geometry approach inspired by the irregular structures of the material geometries. The interface shear analyses were conducted to determine peak, residual interface friction and dilation angles, coordination number, and contact anisotropy using discrete element numerical method. The analysis parameters were calibrated with the experimental results of a custom-made transparent interface shear box using digital image processing. The analysis results show that the interface friction and dilation angles increase with increasing fractal dimension of particle shape and surface roughness. However, the friction angle exhibits a bell-shaped distribution with the change of the gradation fractal dimension. Moreover, the effect of the gradation fractal dimension on the friction angle differs depending on the roughness level. The rate of contact loss and contact anisotropy follow similar trends to the interface friction angle with changes in fractal dimensions. Considering the fractal dimension of the material geometries, macro and micro scale interface responses were defined and the correlation between these two scales was established.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105072"},"PeriodicalIF":4.2,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155356","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

Synthesis of Ag-NPs decorated SnO2 for enhanced photocatalytic degradation of Eosin B based on central composite design 基于中心复合设计的Ag-NPs修饰SnO2光催化降解伊红B的研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-25 DOI: 10.1016/j.apt.2025.105068

Zahra Abdollahi Joobani, S. Siamak Ashraf Talesh

{"title":"Synthesis of Ag-NPs decorated SnO2 for enhanced photocatalytic degradation of Eosin B based on central composite design","authors":"Zahra Abdollahi Joobani, S. Siamak Ashraf Talesh","doi":"10.1016/j.apt.2025.105068","DOIUrl":"10.1016/j.apt.2025.105068","url":null,"abstract":"<div><div>The photocatalytic degradation performance of Eosin B using synthesized pure and silver nanoparticles (xAg-NPs) decorated tin dioxide (SnO<sub>2</sub>) were investigated. The synthesized nanoparticles were characterized using UV–Vis spectrophotometer, XRD, TEM, FESEM, EDS, and elemental mapping. XRD analysis confirmed that both SnO<sub>2</sub> and Ag-SnO<sub>2</sub> nanoparticles possess crystalline structures, with average sizes of 15 and 13 nm, respectively. TEM images revealed that the tetragonal morphology of SnO<sub>2</sub> nanoparticles changed to spherical with Ag-NPs decoration. Furthermore, the band-gap of the particles decreased from 3.6 to 3.4 eV after decoration with Ag-NPs to SnO<sub>2</sub>. The photocatalytic process was evaluated using response surface methodology (RSM) based on central-composite design (CCD), considering four independent factors. Various operational variables, such as initial dye concentration (10–30 mg/l), pH (4–10), catalyst amount (40–200 mg), and irradiation time (60–240 min), were considered to identify the optimal conditions for the photodegradation of Eosin B. Analysis of variance (ANOVA) was applied to detect the influential factors and their significance levels. Process optimization revealed that the highest photocatalytic degradation efficiency of 100 % was obtained at an irradiation time, pH, catalyst amount, and dye concentration of 239.8 min, 6.74, 185.6 mg, and 10.0 mg/l, respectively. The degradation reactions corresponded well with first-order kinetics.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105068"},"PeriodicalIF":4.2,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155360","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

Monitoring of powder flow focus in laser metal deposition: experimental and numerical analysis of gas-powder interaction mechanisms 激光金属沉积中粉末流动焦点的监测：气-粉相互作用机理的实验与数值分析

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-25 DOI: 10.1016/j.apt.2025.105070

Pengfei Guo , Ruixi Peng , Yichen Huang , Liqun Li , Shan Gao

{"title":"Monitoring of powder flow focus in laser metal deposition: experimental and numerical analysis of gas-powder interaction mechanisms","authors":"Pengfei Guo , Ruixi Peng , Yichen Huang , Liqun Li , Shan Gao","doi":"10.1016/j.apt.2025.105070","DOIUrl":"10.1016/j.apt.2025.105070","url":null,"abstract":"<div><div>The powder flow focus is critical in determining the quality of Powder-based Laser Metal Deposition (LMD-p). However, systematic studies on the monitoring of powder focus remain limited. To address this, the influence of in-process parameters and the underlying physical mechanisms was comprehensively investigated by combining the optical measurement experiments and CFD-DEM two-way coupling simulations in this study. Four quantitative descriptors were introduced to describe the spatial distribution of powder focus: Powder Focus Length (PFL), Relative Focus Density (RFD), Half Max-Density Focus Diameter (HMFD), and Half Max-Density Distance (HMD). The results demonstrate that the powder focus is synergistically influenced by the Shieldgas, Carriergas and powder feeding rate. Adjusting the coaxial shielding gas can effectively regulate the focal position by about 21.4 % (2.5 mm) without affecting focus distribution. Increasing the Carriergas enhances the convergence of the powder flow and improves focus position stability. A higher powder feeding rate results in a larger HMFD and RFD of powder focus, which also provides a greater HMD for the stand-off distance from the nozzle. The influencing mechanisms of gas on powder flow dynamics were further analyzed, and the initial velocity as well as gas flow field were found to be the key factors that influence the powder flow dynamics.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105070"},"PeriodicalIF":4.2,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155358","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

Performance analysis and multi-objective optimization of spiral fin heater based on CFD-DEM 基于CFD-DEM的螺旋翅片加热器性能分析及多目标优化

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-24 DOI: 10.1016/j.apt.2025.105065

Yi Zhang , Ling Hu , Lida Chen , Zhen Wang , Daqin Zhang , Zhongbing Li

{"title":"Performance analysis and multi-objective optimization of spiral fin heater based on CFD-DEM","authors":"Yi Zhang , Ling Hu , Lida Chen , Zhen Wang , Daqin Zhang , Zhongbing Li","doi":"10.1016/j.apt.2025.105065","DOIUrl":"10.1016/j.apt.2025.105065","url":null,"abstract":"<div><div>Degassing is crucial in oil drilling, the drilling fluid needs to be heated through the heater in order to improve the efficiency of degassing. This study examines the flow characteristics of hard particles in refluxing drilling fluid in the heater spiral channel and their impact on the thermal efficiency of the heater. The effects of particle flow and size on the thermal performance of spiral heater fins were studied by numerical simulation. In addition, this research explores the use of neural networks and genetic algorithms inmulti-objective optimization of spiral fin heaters. a numerical simulation using the CFD-DEM approach was performed to examine the impact of heater fin structural characteristics and drilling fluid inlet flow rate on heating performance. Secondly, to improve heat transfer and minimize pressure drop, a neural network prediction model was developed using simulation results of various parameters, followed by multi-objective optimization using evolutionary algorithms. The numerical simulation was validated by comparing the results of the spiral heater experimentally and numerically. The accuracy of the numerical simulation is confirmed by comparing the experimental results of the spiral heater with those obtained from the simulation.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105065"},"PeriodicalIF":4.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155359","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 the purity and whiteness of carbonated products from carbide slag via calcination and magnetic separation 电石渣焙烧磁选提高碳化产品纯度和白度

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-20 DOI: 10.1016/j.apt.2025.105063

Jintao Ma , Lin Chen , Fengjie Zhang , Yadong Zhang , Chao Lv , Jinglei Cui , Xinxing Zhou , Yanxia Guo , Zihe Pan

{"title":"Enhancing the purity and whiteness of carbonated products from carbide slag via calcination and magnetic separation","authors":"Jintao Ma , Lin Chen , Fengjie Zhang , Yadong Zhang , Chao Lv , Jinglei Cui , Xinxing Zhou , Yanxia Guo , Zihe Pan","doi":"10.1016/j.apt.2025.105063","DOIUrl":"10.1016/j.apt.2025.105063","url":null,"abstract":"<div><div>Although the technology of fixing CO<sub>2</sub> with carbide slag (CS) has developed rapidly, its inherent impurities severely restrict the purity and whiteness of the carbonation products, hindering their high-value utilization. This study systematically explored and revealed the occurrence states of key impurities (Al<sub>2</sub>O<sub>3</sub>, MgO, Fe<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, CaCO<sub>3</sub> and elemental C) in CS. Carbon impurities reduce carbonization efficiency. Fe<sub>2</sub>O<sub>3</sub>, as a colored impurity, severely affects both the purity and whiteness of the product. To overcome this limitation, this study innovatively combined calcination and magnetic separation approaches to remove impurities. The experimental results revealed that this technology can efficiently remove carbon (removal rate of 44.7%) and iron (removal rate of 53.7%), resulting in the purity and whiteness of the carbonation products reaching 91.7% and 98.3%, respectively. Despite the challenges associated with the removal efficiency of carbon impurities and the specificity of magnetic iron impurities, our technology provides a practical and effective solution for improving the quality of CS carbonation products. This work is conducive to the resource utilization of chlor-alkali industrial waste and helps in achieving the broader goal of carbon neutrality.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105063"},"PeriodicalIF":4.2,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106146","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

Periodic wear modelling in bulk solids screw conveying: A surface-profile-based framework validated through experiment and DEM simulation 散装固体螺旋输送中的周期性磨损建模：通过实验和DEM仿真验证的基于表面轮廓的框架

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-19 DOI: 10.1016/j.apt.2025.105067

Weijie Yang , Yangyi Zhang , Yuan Tan

{"title":"Periodic wear modelling in bulk solids screw conveying: A surface-profile-based framework validated through experiment and DEM simulation","authors":"Weijie Yang , Yangyi Zhang , Yuan Tan","doi":"10.1016/j.apt.2025.105067","DOIUrl":"10.1016/j.apt.2025.105067","url":null,"abstract":"<div><div>The vertical screw ship unloader plays a vital role in the transportation of bulk cargo at ports. However, severe wear of screw pipe wall remains a major challenge, often shortens its service life and increases maintenance costs. Existing models cannot accurately predict wear progression or assess its lifespan under different operating conditions. In this study, a novel predictive framework, which did not require on-site disassembly or operational interruption, was proposed to assess screw pipe wear. In the framework, the Archard wear model was integrated with the single-particle method and a continuous medium assumption. Its effectiveness was validated by both experimental results and discrete element method (DEM) simulations. With this framework, particle accumulation patterns within the screw conveyor were classified into four types. For each type, a corresponding periodic wear model was proposed and its prediction results were closer to experimental results than conventional DEM-based predictions. Parametric analysis indicated that screw rotational speed had the more significant impact on wear intensity than the filling degree of materials. Additionally, the study confirmed periodic wear along screw pipe and similar wear rates periodically occurring at intervals equal to screw pitch.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105067"},"PeriodicalIF":4.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106144","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 study on the combustion characteristics and soot formation in an outwardly propagating iso-octane rich turbulent flame 向外传播的富异辛烷湍流火焰燃烧特性及烟尘形成的数值研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-19 DOI: 10.1016/j.apt.2025.105057

Takashi Ikeda , Hiroaki Watanabe , Ekenechukwu Chijioke Okafor , Ryoichi Kurose , Toshiaki Kitagawa

{"title":"Numerical study on the combustion characteristics and soot formation in an outwardly propagating iso-octane rich turbulent flame","authors":"Takashi Ikeda , Hiroaki Watanabe , Ekenechukwu Chijioke Okafor , Ryoichi Kurose , Toshiaki Kitagawa","doi":"10.1016/j.apt.2025.105057","DOIUrl":"10.1016/j.apt.2025.105057","url":null,"abstract":"<div><div>Direct numerical simulation of a two-dimensional outwardly propagating <em>iso</em>-octane rich turbulent flames which was classified into Corrugated Flamelets regime in Peters diagram was conducted at an equivalence ratio of 1.4 to investigate the effects of local flame stretch rate and turbulence on soot formation and distribution with a non-unity Lewis number. Soot formation was investigated at points where the flame stretch rate was almost identical, while the contribution of curvature and flow to stretch rate differed. At all points, soot formation is remarkable at regions with negative flame stretch rate compared to regions with positive flame stretch rate. These results suggest that flame stretch rate may correlate with soot formation in turbulent flames in the Corrugated Flamelets regime. In this study, C<sub>2</sub>H<sub>2</sub> is regarded as the precursor of soot. At regions with negative flame stretch rate, the C<sub>2</sub>H<sub>2</sub> concentration is higher than that at regions with positive flame stretch rate. In addition, in the region where the contribution of flow field is larger than that of curvature, soot distribution is located further towards the burned side compared to the region of negative flame stretch rate. These results indicate that the effect of turbulence itself on soot distribution.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105057"},"PeriodicalIF":4.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106141","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

Flowability, shape and structure characterization of recycled particles originating from electro discharge machining of H11 alloy H11合金电火花加工再生颗粒的流动性、形状和结构表征

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-19 DOI: 10.1016/j.apt.2025.105064

Oliver Voigt, Thomas Buchwald, Lisa Ditscherlein, Ralf Ditscherlein, Urs Alexander Peuker

{"title":"Flowability, shape and structure characterization of recycled particles originating from electro discharge machining of H11 alloy","authors":"Oliver Voigt, Thomas Buchwald, Lisa Ditscherlein, Ralf Ditscherlein, Urs Alexander Peuker","doi":"10.1016/j.apt.2025.105064","DOIUrl":"10.1016/j.apt.2025.105064","url":null,"abstract":"<div><div>There is a need in metal powder manufacturing to provide alternative supplies because the only production method is the energy– and cost–intensive melt atomization. The aim of this study is focused on recycling of metallic particles originating from electro discharge machining. Extracted particles from accumulating erosion sludges fulfill theoretically specifications of powders regarding particle size and shape. Two fractions were analyzed via laser diffraction, image analysis and electron microscopy and compared to the benchmark <em>H</em>11–alloy. Bulk properties were measured and powders were investigated in a powder shear cell regarding flowability. These properties were combined with measurements of particle surface roughness in an atomic force microscope. Powders were examined by micro–computed tomography to obtain particle–discrete data. Recycled particles fulfill requirements regarding size, shape and defects. Their bulk properties align with the reference, showing improved or worsened flowability at certain stresses. Attached graphite in recycled fractions is acting simultaneously as nano–roughness and flow additive. <em>H</em>11 shows an expected flow behavior, and the coarse fraction the smoothest surface. Results of sphericity values cannot support findings for roughness and flowability. Pores within particles are least present for <em>H</em>11, hence recycled fractions have better pore performance compared to literature.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105064"},"PeriodicalIF":4.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106145","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