Advanced Powder Technology最新文献

英文中文

Corrigendum to “Effect of milling time on structural, physical and tribological behavior of a newly developed Ti-Nb-Zr alloy for biomedical applications”. [Adv. Powder Technol. 35(1) (2024) 104306] “铣削时间对新开发的生物医学用Ti-Nb-Zr合金的结构、物理和摩擦学性能的影响”的勘误表。[Adv.粉末技术，35(1)(2024)104306]

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-13 DOI: 10.1016/j.apt.2025.105147

Fouzia Hamadi , Mamoun Fellah , Naouel Hezil , Dikra Bouras , Salah Eddine Laouini , Alex montagne , Hamiden Abd El-Wahed Khalifa , Aleksei Obrosov , Gamal A. El-Hiti , Krishna Kumar Yadav

引用次数: 0

Optimization of (FeCrNi)100-xCx medium-entropy alloys via powder plasma arc additive manufacturing: microstructure and property regulation by carbon content 粉末等离子体电弧增材制造优化（FeCrNi）100-xCx中熵合金：碳含量对合金组织和性能的影响

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-11 DOI: 10.1016/j.apt.2025.105131

Ning Ou , Jiaxiang Xue , Qingkai Shen , Zehong Zheng , Xiaoyan Yu , Li Jin

Multi-principal element medium-entropy alloys have recently garnered significant attention due to their stable single-phase solid solution structure and superior mechanical properties. Adding carbon can form Cr₂₃C₆ carbide particles within single-phase face-centered cubic medium-entropy alloys, leading to second phase strengthening and, consequently, enhancing their strength. This study investigates the impact of carbon content in additive manufacturing on the microstructure and mechanical properties of FeCrNi medium-entropy alloys. (FeCrNi)_100-xC_x medium-entropy alloys (x = 0, 2, 3, 4) were prepared using powder plasma arc additive manufacturing, and their structure and properties were characterized in detail. The sample without carbon addition displayed a single-phase face-centered cubic structure, but internal defects such as cracks and pores led to poor mechanical performance. With the addition of carbon, carbide precipitation gradually became evident in the samples, significantly improving their mechanical properties. The hardness increased from 140.59HV to 262.75HV, and the ultimate tensile strength increased from 273.73 MPa to 759.74 MPa. The results indicate that adding an appropriate amount of carbon forms carbides within the alloy, significantly enhancing its mechanical properties.

多主元中熵合金以其稳定的单相固溶结构和优异的力学性能近年来引起了人们的广泛关注。添加碳可以在单相面心立方中熵合金中形成Cr23C6碳化物颗粒，导致合金的第二相强化，从而提高合金的强度。研究了增材制造中碳含量对FeCrNi中熵合金显微组织和力学性能的影响。采用粉末等离子弧增材制造技术制备了（FeCrNi）100-xCx中熵合金（x = 0,2,3,4），并对其结构和性能进行了详细表征。未添加碳的样品表现为单相面心立方结构，但内部存在裂纹、气孔等缺陷，导致力学性能较差。随着碳的加入，样品中碳化物析出逐渐明显，力学性能显著提高。硬度由140.59HV提高到262.75HV，极限抗拉强度由273.73 MPa提高到759.74 MPa。结果表明，适量的碳在合金内部形成碳化物，显著提高了合金的力学性能。

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引用次数: 0

Maltodextrin spray drying in a compact radial multizone dryer – First pilot plant findings 麦芽糖糊精喷雾干燥在一个紧凑的径向多区干燥-第一个试点工厂的发现

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-11 DOI: 10.1016/j.apt.2025.105148

Santanu Dey, Thomas Tourneur, Axel de Broqueville, Armand Béché, Juray De Wilde

A novel compact radial multizone dryer (RMD) has been tested at the pilot scale. In the radial centre of the chamber, hot air and the atomized solution are injected axially and counter current. In the periphery, mild temperature air is injected through multiple short vortex chambers to generate a rotational motion in the chamber and ensure high-G intensified drying and separation of the produced powder and hot drying air. The RMD allows fast initial drying of the injected droplets with hot air in the radial centre and fast evacuation of the initially dried powder to the periphery for final drying with mild temperature air. First, dry and water evaporation tests were carried out to gain insight in the flow pattern and temperature profile in the chamber. Next, a 4.5 min duration spray drying test was carried out using a 40 % maltodextrin model solution at a solution feed rate of 16.1 g/s. The tests demonstrated the working principle and performance of the RMD. Powder recovery and quality, as well as energy efficiency are discussed.

一种新型紧凑型径向多区干燥机（RMD）已在中试规模进行了测试。在腔室的径向中心，热空气和雾化溶液被轴向和逆流注入。在外围，通过多个短涡室注入温和温度的空气，在室内产生旋转运动，保证生产的粉末和热干空气的高g强化干燥和分离。RMD允许在径向中心用热空气对注入的液滴进行快速初始干燥，并将最初干燥的粉末快速疏散到外围，以使用温和温度的空气进行最终干燥。首先，进行了干燥和水蒸发试验，以了解室内的流动模式和温度分布。其次，采用40%麦芽糖糊精模型溶液，溶液进料速率为16.1 g/s，进行持续4.5 min的喷雾干燥试验。试验验证了RMD的工作原理和性能。讨论了粉末的回收和质量，以及能源效率。

引用次数: 0

Effect of solidification microstructure in TiAl alloy bars on particle size and composition of powders produced by plasma rotating electrode process TiAl合金棒材凝固组织对等离子体旋转电极法制备粉末粒度和成分的影响

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-09 DOI: 10.1016/j.apt.2025.105146

Xingbo Yang , Liang Yang , Changshu Xiang , Hui Wang , Nianguang Sun , Weiwei He , Dong Liu , Shuai Xu

Alloy bars of Ti-48Al-2Cr-2Nb with a hyperperitectic solidification microstructure and Ti-46Al-8Nb with a single β solidification microstructure were used as feedstock for the Plasma Rotating Electrode Process (PREP). Under identical conditions, Ti-48Al-2Cr-2Nb powders exhibited a mean particle size of 150.2 μm with a <150 μm yield of 50.2 %, showing decreasing Al and Cr contents and increasing Nb content with particle size. In contrast, Ti-46Al-8Nb powders showed a mean size of 69.6 μm, a <150 μm yield of 93 %, and negligible compositional variation. Feedstock microsegregation was first correlated with particle size and compositional variations. Inhomogeneous melting of hyperperitectic structures produces coarser particles with compositional gradients, while single β solidified alloys yield finer and more uniform powders. High-energy X-ray diffraction revealed the hexagonal structure as disordered α phase rather than ordered α₂ phase. Phase analysis showed γ phase increasing from 27.4 % to 73.2 % in Ti-48Al-2Cr-2Nb and B2 phase from 65.8 % to ∼0 % in Ti-46Al-8Nb with increasing particle size. The evolution of phase fractions and lattice parameters with particle size was systematically investigated. This study deepens the understanding of the PREP atomization mechanism and provides guidance for improving powder yield and exploring phase transformation behavior in rapidly solidified TiAl alloys.

采用高晶凝固组织的Ti-48Al-2Cr-2Nb合金棒和单一β凝固组织的Ti-46Al-8Nb合金棒作为等离子体旋转电极工艺（PREP）的原料。在相同条件下，Ti-48Al-2Cr-2Nb粉末的平均粒径为150.2 μm，产率<；150 μm为50.2%，Al和Cr含量随粒径的增大而减小，Nb含量随粒径的增大而增大。相比之下，Ti-46Al-8Nb粉末的平均尺寸为69.6 μm，产率为93%，成分变化可以忽略不计。原料微偏析首先与粒度和成分变化有关。高晶组织的不均匀熔炼产生的颗粒较粗，具有成分梯度，而单一β凝固合金产生的粉末更细，更均匀。高能x射线衍射显示，六方结构为无序α相而非有序α2相。相分析表明，随着粒径的增大，Ti-48Al-2Cr-2Nb的γ相从27.4%增加到73.2%，Ti-46Al-8Nb的B2相从65.8%增加到~ 0%。系统地研究了相分数和晶格参数随粒径的变化规律。该研究加深了对PREP雾化机理的认识，为提高粉末收率和探索快速凝固TiAl合金的相变行为提供了指导。

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引用次数: 0

An improved meshfree approach for solving nonlinear multivariate models involving aggregation, breakage, growth and source 一种改进的无网格法求解包含聚集、断裂、生长和源的非线性多元模型

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-09 DOI: 10.1016/j.apt.2025.105145

Amit Paswan , Jitraj Saha , Stefan Heinrich

The modeling of aggregation and collisional breakage phenomena remains largely unexplored due to nonlinearity and nonlocal nature of the model equation. This article discusses the performance and efficiency of a redefined homotopy-based method and generalized iteration method for solving bivariate aggregation-collision breakage model for several kinetic kernels. Solution for Brownian motion kernel and equi-partition of kinetic energy kernel are obtained to analyze the dynamics of bubble columns as well as the granular flow behavior. The iterative scheme is further extended to solve aggregation-breakage model with simultaneous growth and source terms. This model is also extended for solving bivariate cases.

由于模型方程的非线性和非局域性，聚集和碰撞破碎现象的建模在很大程度上仍未得到探索。讨论了基于重定义同伦法和广义迭代法求解多核二元聚集-碰撞破碎模型的性能和效率。得到了气泡柱的布朗运动核和动能核等配分解，分析了气泡柱的动力学和颗粒流动行为。将迭代方法进一步推广到求解同时具有生长项和源项的聚集-破碎模型。该模型也适用于求解二元情况。

引用次数: 0

Simulation of the biomass pyrolysis process of cubic particles in a fluidized bed using the superquadric method 用超二次法模拟立方颗粒在流化床中的生物质热解过程

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-05 DOI: 10.1016/j.apt.2025.105144

Haoyuan Li , Jiajie Sun , Jun Xie , Xuejiao Liu , Xiaole Chen , Miaomiao Niu

Most biomass particles exhibit non-spherical geometries, while their thermochemical conversion mechanisms remain insufficiently understood. This study extends the CFD-DEM framework through incorporation of the superquadric method to investigate cubic biomass particle pyrolysis in fluidized beds, with an isotropic shrinkage model developed to describe particle size evolution. Following model validation, the typical particle-scale characteristics including trajectory, velocity, temperature, and size distribution are analyzed. Notably, biomass particles demonstrate greater bed height compared to sand particles due to differences in density and size variation.

The parametric investigation examined the effects of bed temperature, gas velocity, and particle size distribution on flow and reactive characteristics. Results indicate that both gas velocity and bed temperature significantly influence particle hydrodynamics, while particle size distribution shows negligible effects. Elevated bed temperatures substantially enhance particle heating rates, shrinkage behavior, mass loss, and component conversion efficiency. Product composition analysis reveals that higher temperatures promote light gas formation while suppressing tar and char yields, with gas velocity and particle size distribution demonstrating minimal impact on composition. These findings provide fundamental insights into non-spherical biomass particle behavior in fluidized bed systems.

大多数生物质颗粒表现出非球形几何形状，而它们的热化学转化机制仍然不充分了解。本研究扩展了CFD-DEM框架，通过引入超二次方法来研究立方生物质颗粒在流化床中的热解，并建立了一个各向同性收缩模型来描述颗粒尺寸的演变。在模型验证之后，分析了典型的颗粒尺度特征，包括轨迹、速度、温度和尺寸分布。值得注意的是，由于密度和尺寸变化的差异，生物质颗粒比砂粒表现出更高的床层高度。参数化研究考察了床层温度、气速和粒度分布对流动和反应特性的影响。结果表明，气速和床层温度对颗粒流体力学有显著影响，而粒径分布对颗粒流体力学的影响可以忽略不计。升高的床层温度大大提高了颗粒的加热速率、收缩行为、质量损失和组分转换效率。产品成分分析表明，较高的温度促进轻气的形成，同时抑制焦油和炭的产率，气体速度和粒度分布对成分的影响最小。这些发现为非球形生物质颗粒在流化床系统中的行为提供了基本的见解。

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引用次数: 0

Controllable preparation and characterization of single-phase W-10Ti powder for high-performance refractory alloy targets 高性能耐火合金靶用单相W-10Ti粉末的可控制备与表征

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-05 DOI: 10.1016/j.apt.2025.105135

Baokai Wang , Ning Luo , Zewen Wang , Chengcheng Ye , Zongwen Fu , Xiaochao Wu , Qingkui Li , Jilin He

In this work, mechanical alloying is used to prepare single-phase W-10Ti alloy powder. The effects of ball milling time on the phase constitution, morphology, particle size, composition, oxygen content and the occurrence state of oxygen of W-10Ti alloy powder are thoroughly studied. The results show that the morphology of particles gradually changes from the irregular polyhedron to the sphere with increasing milling time. The D₅₀ of the powder increases from ∼13.9 µm for initial powder to ∼24.1 µm after 2 h ball milling, and then decreases to ∼6.7 µm after 16 h ball milling. When milling for 8 h, W and Ti achieve a complete solid solution. The application of an excessive ball milling time readily results in a drastic increase in the oxygen content. The oxygen content of the powder increases from 1082.1 ppm for initial powder over 4130.9 ppm after 8 h ball milling to 6343.3 ppm after 16 h ball milling. This work offers critical theoretical insights and technical guidance for the controllable synthesis and characterization of pre-alloyed powders by physical metallurgy methods.

本工作采用机械合金化法制备单相W-10Ti合金粉末。研究了球磨时间对W-10Ti合金粉末的相组成、形貌、粒度、成分、氧含量及氧赋存状态的影响。结果表明：随着磨矿时间的延长，颗粒形貌逐渐由不规则多面体向球体转变；粉末的D50从初始粉末的~ 13.9µm增加到2 h球磨后的~ 24.1µm，然后在球磨16 h后下降到~ 6.7µm。当铣削8 h时，W和Ti达到完全固溶体。球磨时间过长很容易导致氧含量急剧增加。球磨8 h后，粉末的氧含量从初始粉末的1082.1 ppm增加到4130.9 ppm，球磨16 h后增加到6343.3 ppm。这项工作为物理冶金方法可控合成和表征预合金粉末提供了重要的理论见解和技术指导。

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引用次数: 0

Remarkable flexo-photocatalytic organic pollutant degradation by oxygen vacancy engineered nonpolar NaBi(MoO4)2 nanospheres 氧空位工程非极性NaBi(MoO4)2纳米球对柔性光催化有机污染物的显著降解

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-01 DOI: 10.1016/j.apt.2025.105129

Tianxiang Ren , Pengyue Xing , Liying Wang , Zhenzhu Cao , Zhengxiang Cheng , Yutong Xiao , Feifei Wang , Erjun Zhao , Shujun Zhang

The wide band gap and rapid recombination of electron-hole pair significantly limit the activity of photocatalyst. Although the polarization in ferroelectric under stress can enhance charge separation, this effect is restricted to polar materials. Overcoming this limitation is a key challenge in designing advanced catalyst capable of converting both light and mechanical energy into chemical energy. In this work, oxygen vacancy has been introduced into centrosymatric NaBi(MoO₄)₂ (NBMO) nanospheres via a facile annealing treatment, which greatly improved the photocatalytic, flexocatalytic and photo-flexocatalytic performance. The composition with optimal oxygen vacancy concentration (NBMO-5) showed remarkable flexo-photocatalytic activity, which achieved 98.7 % RhB degradation within 8 min, outperforming individual flexocatalysis and photocatalysis by 10-fold and 4-fold, respectively. The outstanding performance is attributed to the synergistic effects of oxygen vacancies and flexoelectric potential, which effectively suppress charge recombination and enhance photocatalytic activity. Active species trapping experiment reveals that •OH and h⁺ play nearly equally important roles in the flexo-photocatalysis, different from individual photocatalysis and flexocatalysis. Mass spectra analysis indicates that conjugate ring destruction is the dominant pathway during flexo-photocatalytic degradation of RhB by the NBMO-5 catalyst. This work demonstrates that oxygen vacancy is an innovative strategy for engineering centrosymmetric materials to address environmental remediation challenge.

较宽的带隙和电子-空穴对的快速复合严重限制了光催化剂的活性。在应力作用下，铁电体的极化可以促进电荷分离，但这种作用仅限于极性材料。克服这一限制是设计能够将光能和机械能转化为化学能的先进催化剂的关键挑战。本研究通过简单的退火处理，将氧空位引入到中心对称NaBi(MoO4)2 （NBMO）纳米球中，大大提高了其光催化、柔催化和光柔催化性能。最佳氧空缺浓度的组合物（NBMO-5）表现出优异的柔光催化活性，在8 min内对RhB的降解率达到98.7%，分别比单独的柔光催化和光催化性能高10倍和4倍。这种优异的性能是由于氧空位和柔性电位的协同作用，有效地抑制了电荷重组，提高了光催化活性。活性物质捕获实验表明，•OH和h+在柔化光催化中起着几乎同等重要的作用，不同于单独的光催化和柔化催化。质谱分析表明，NBMO-5催化剂柔化光催化降解RhB时，共轭环破坏是主要途径。这项工作表明，氧空位是工程中心对称材料解决环境修复挑战的创新策略。

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引用次数: 0

Increasing the yields of natural flake graphite spheronization with the NARA Hybridization System 用NARA杂交系统提高天然鳞片石墨球化收率

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-01 DOI: 10.1016/j.apt.2025.105115

Dean Glass , Thushan Pathirana , Shiqin Yan , Adam S. Best , Mehrdad Parsa , Karl Bunney , Amanda V. Ellis

Commercial natural flake graphite spheronization using mill trains, particularly for lithium-ion battery (LIB) materials, is known to produce low yields (30–50 %) post-processing. The NARA Hybridization System (NHS-0) is a rotary mill with the capability to spheronize natural flake graphite within the specifications required for LIB graphite materials. In this work, commercial natural flake graphite, with a D₅₀ particle size of ∼ 83 µm, was spheronized in a NHS-0 at various speeds and durations. Conditions were optimized to produce spheronized particles in the size range of 4 µm to 30 µm, ideal for LIB anodes for electric vehicle applications. The optimal conditions for 10 g batches were found to be 9000 RPM for 180 s, which produced the highest yield (52 %), in specification, with the least amount of fines (<4 µm). This product was sieved with coarser material (>25 µm) and re-fed into the NHS-0 in order to maximise the yields. The cumulative total yields from the re-spheronization were 65 %, 68 % and 71 % for the 1st, 2nd and 3rd re-spheronizations, respectively. Notably, the re-spheronization did not degrade the product as observed via X-ray diffraction, scanning electron microscopy and Raman spectroscopy. Coin cell testing showed a minor decrease in initial coulombic efficiency of 93.1 % to 90.1 % and capacity from the initial spheronization to the 3rd re-spheronized materials, respectively.

使用磨机系统进行天然鳞片石墨球化，特别是锂离子电池（LIB）材料，后处理收率很低（30 - 50%）。NARA杂交系统（NHS-0）是一种旋转磨机，能够在LIB石墨材料要求的规格范围内将天然片状石墨球化。在这项工作中，D50粒径为~ 83µm的商业天然鳞片石墨在NHS-0中以不同的速度和持续时间被球化。优化了条件，生产出尺寸在4µm到30µm之间的球形颗粒，这是电动汽车用锂离子电池阳极的理想材料。10 g批次的最佳条件为9000 RPM， 180 s，收率最高（52%），规格最小（4µm）。该产品用粗料（>25µm）筛过，再送入NHS-0，以最大限度地提高收率。第1次、第2次和第3次再球化的累计总得率分别为65%、68%和71%。值得注意的是，通过x射线衍射、扫描电子显微镜和拉曼光谱观察到，再圆化并没有使产品降解。硬币电池测试表明，从初始球化到第三次再球化材料，初始库仑效率和容量分别略有下降，分别为93.1%至90.1%。

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IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-01 DOI: 10.1016/S0921-8831(25)00358-9

引用次数: 0

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