Advanced Powder Technology最新文献_第2页

Microstructure and mechanical properties of WC-CoCrFeNiMoX-based cemented carbide with bimodal WC grain size distribution 具有双峰WC晶粒尺寸分布的WC- cocrfenimox基硬质合金的组织与力学性能

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-17 DOI: 10.1016/j.apt.2026.105205

Jintao Li , Min Chen , Kang Peng , Xizhang Chen , Junjie Xie , Delin Peng , Fengtao Sun , Fuhao Yao

This study systematically investigates the influence of molybdenum (Mo) content on the microstructure and mechanical properties of WC-CoCrFeNiMo_X high-entropy alloy (HEA)-bonded cemented carbides. Samples were prepared by wet-milling WC powders of varying particle sizes with CoCrFeNiMo_X (X = 0.1, 0.5, 1.0) binders, followed by sintering at 1460°C under multi-atmosphere conditions. The effects of Mo content on phase composition, grain morphology, hardness, and fracture behavior were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and mechanical property tests. Results indicate that Mo addition significantly refines WC grains and promotes their spheroidization, achieving a Vickers hardness of 1663.7 HV₃₀, an attribute that reflects superior performance compared to traditional Co-bonded WC materials. However, increasing Mo content exacerbates binder phase embrittlement and carbon deficiency, resulting in a reduction in transverse rupture strength (TRS) as Mo content increases. Fractographic analysis reveals that low-Mo samples exhibit a mixed intergranular-cleavage fracture mode, whereas high-Mo samples predominantly undergo intergranular fracture. Within the studied system, Coarse WC grains enhance toughness by impeding crack propagation. This work highlights the potential of HEA binders for balancing hardness and toughness in cemented carbides, and proposes that optimizing Mo content and suppressing carbon loss are critical strategies for improving comprehensive performance. These findings provide a theoretical foundation for the development of high-performance wear-resistant materials.

本研究系统地研究了钼含量对WC-CoCrFeNiMoX高熵合金（HEA）结合硬质合金组织和力学性能的影响。以CoCrFeNiMoX （X = 0.1, 0.5, 1.0）为粘结剂，湿磨不同粒径的WC粉，在1460℃多气氛下烧结。采用x射线衍射（XRD）、扫描电镜（SEM）和力学性能测试分析Mo含量对相组成、晶粒形貌、硬度和断裂行为的影响。结果表明，Mo的加入显著细化了WC晶粒，促进了WC晶粒的球化，其维氏硬度达到1663.7 HV30，与传统的共键WC材料相比，具有更优异的性能。然而，Mo含量的增加加剧了粘结剂相脆化和碳缺乏症，导致横向断裂强度（TRS）随Mo含量的增加而降低。断口分析表明，低mo试样表现为晶间解理混合断裂模式，而高mo试样主要表现为晶间断裂。在研究的体系中，粗WC晶粒通过阻碍裂纹扩展来提高韧性。这项工作强调了HEA粘结剂在平衡硬质合金硬度和韧性方面的潜力，并提出优化Mo含量和抑制碳损失是提高综合性能的关键策略。这些发现为高性能耐磨材料的开发提供了理论基础。

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引用次数: 0

Full title (Editorial Board Members) 全称（编委成员）

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-03-07 DOI: 10.1016/S0921-8831(26)00056-7

引用次数: 0

Effect of PVA saponification degree on internal structural changes in silica slurry during drying PVA皂化程度对干燥过程中硅浆内部结构变化的影响

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-26 DOI: 10.1016/j.apt.2026.105189

Hiromasa Kuroda , Junichi Tatami , Motoyuki Iijima , Takuma Takahashi

This study examined the effect of adding polyvinyl alcohol (PVA) with varying degrees of saponification to an aqueous silica slurry on internal structural changes during drying using optical coherence tomography. During the initial stage of drying, the slurries began to agglomerate from the surface. Particle concentration in the agglomerated regions increased with higher saponification degrees of the added PVA. Considering the solubility of PVA and the hydrophilicity of the adsorption layer on the particles, the effect of saponification degree on the particle concentration in the agglomerated regions is attributed to variations in the electrophoretic mobility distribution and the thickness of the PVA adsorption layer on the particles. In the middle stage of drying, the magnitude of deformation in the agglomerated regions varied depending on the particle concentration and the thickness of the PVA adsorption layer. The dominant factors controlling the green density of the dried slurry were both the particle concentration in the agglomerated regions during the initial stage and the magnitude of deformation in these regions during the middle stage.

本研究利用光学相干断层成像技术研究了在硅水浆中加入不同皂化程度的聚乙烯醇（PVA）对干燥过程中硅水浆内部结构变化的影响。在干燥的初始阶段，浆料开始从表面聚集。聚乙烯醇的皂化程度越高，团聚区的颗粒浓度越高。考虑到PVA的溶解度和吸附层对颗粒的亲水性，皂化程度对凝聚区颗粒浓度的影响归因于粒子的电泳迁移率分布和PVA吸附层厚度的变化。在干燥中期，颗粒浓度和PVA吸附层的厚度不同，团聚区的变形大小也不同。控制干燥浆体绿密度的主导因素是初始阶段凝聚区的颗粒浓度和中期这些区域的变形幅度。

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引用次数: 0

Effect of orifice positions on velocity fluctuations during granular discharge from a Quasi-2D rectangular silo 准二维矩形筒仓中孔口位置对颗粒排出速度波动的影响

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI: 10.1016/j.apt.2026.105212

Gaurav Kumar Mishra , Ritwik Maiti , Soumen Mandal , Apurba Kumar Roy

This study examines how orifice position affects velocity fluctuations during gravity-driven discharge from a quasi-2D rectangular silo, combining experiments with Discrete Element Method (DEM) simulations. Experiments used a single 10 × 10 mm² orifice and spherical glass beads (d = 0.9 ± 0.1 mm); high-speed imaging and Digital Particle Image Velocimetry (DPIV) measured front-wall velocity fields for three orifice placements (concentric, mid-eccentric, extreme eccentric). Experimental results show that orifice eccentricity strongly modifies mean flow and fluctuation patterns: extreme eccentric openings produce the largest fluctuations and an asymmetric velocity field adjacent to the sidewall. DEM simulations (front-layer extraction to match DPIV) were first used to validate the experiments, DEM captures average velocities (u_avg and v_avg) and spatial trends (DEM overpredicts v_avg by ≈10% at mid-eccentricity and mass flow by ≈2%), and then to explore parametric effects not varied experimentally. Parametric DEM runs indicate that increasing orifice width and particle diameter generally raise both average discharge velocity and fluctuation magnitudes. Statistical characterization of fluctuations reveals near-Gaussian cores with fat tails close to the outlet. The results show that eccentricity, orifice size, and grain size collectively regulate wall slip, shear localization, and velocity variability, with direct implications for silo design.

本研究结合实验和离散元法（DEM）模拟，研究了在准二维矩形筒仓重力驱动卸料过程中，孔口位置对速度波动的影响。实验采用单个10 × 10 mm2孔和球形玻璃微珠（d = 0.9±0.1 mm）；高速成像和数字粒子图像测速（DPIV）测量了三种孔板位置（同心、中偏心、极偏心）的前壁速度场。实验结果表明，孔口偏心对平均流动和波动模式有强烈的影响：极端偏心开孔会产生最大的波动和靠近侧壁的不对称速度场。首先利用DEM模拟（前层提取以匹配DPIV）对实验进行验证，DEM捕获平均速度（uavg和vavg）和空间趋势（在中偏心率处，DEM对vavg的预测过高约10%，对质量流量的预测过高约2%），然后探索实验未变化的参数效应。参数化DEM运行表明，增大孔板宽度和颗粒直径，平均流速和波动幅度均增大。波动的统计特征表明，在出口附近有粗尾的近高斯核心。结果表明，偏心、孔口尺寸和粒度共同调节壁滑移、剪切局部化和速度变化，对筒仓设计具有直接影响。

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引用次数: 0

Experimental study on fine particle transport and deposition processes in the swirling flow of a cyclone separator 旋流分离器旋流中细颗粒输运与沉积过程的实验研究

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI: 10.1016/j.apt.2026.105213

Bo Hu , Jian-Yi Chen , Li-Xin Yang , Xiao-Jian Wu , Yao-Dong Wei

Cyclone separators are important for industrial dust removal, but fine particle deposition on their inner walls reduces separation efficiency and even causes blockage. To clarify the mechanisms of fine particle transport and deposition in cyclone separators, experiments were conducted using a 100 mm-diameter transparent cyclone separator and spherical silica particles (0.98–4.54 µm), under inlet gas velocities of 5–30 m/s and particle concentrations of 1–100 g/m³. Four typical deposition patterns were confirmed: unstable adhesion pattern (UAP), thick adhesion pattern (TAP), spiral adhesion pattern (SAP), and non-adhesion pattern (NAP), which transition sequentially with increasing inlet gas velocity. Due to the dominant effect of centrifugal force, the dimensionless deposition velocity of particles in swirling flow was found to be 2–3 orders of magnitude higher than that in straight flow, and a quantitative correlation with the dimensionless relaxation time was established. A critical inlet gas velocity U_cr required to remove adhered particles was identified. Furthermore, a particle motion regime map was proposed to demarcate the boundaries of escape, deposition, and collection regions. The results provide valuable insights into the particle deposition mechanisms in swirling flow and offer theoretical support for mitigating particle deposition in cyclone separators.

旋风分离器对工业除尘具有重要意义，但其内壁上的细颗粒沉积降低了分离效率，甚至造成堵塞。为了明确细颗粒在旋风分离器中的运移和沉积机理，在5-30 m/s的进口气流速度和1-100 g/m3的颗粒浓度条件下，采用直径为100 mm的透明旋风分离器和球形二氧化硅颗粒（0.98-4.54µm）进行了实验。结果表明，随着进气速度的增加，沉积模式依次转变为不稳定粘附模式（UAP）、厚粘附模式（TAP）、螺旋粘附模式（SAP）和非粘附模式（NAP）。由于离心力的主导作用，旋流中颗粒的无因次沉积速度比直流中颗粒的无因次沉积速度高2-3个数量级，并与无因次松弛时间建立了定量的相关性。确定了去除粘附颗粒所需的临界入口气速Ucr。此外，提出了一种粒子运动状态图来划定逃逸、沉积和收集区域的边界。研究结果为研究旋流颗粒沉积机理提供了有价值的见解，并为减轻旋流分离器颗粒沉积提供了理论支持。

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引用次数: 0

Modeling liquid bridge by the Young–Laplace equation: the role of energy 用Young-Laplace方程模拟液体桥：能量的作用

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-12 DOI: 10.1016/j.apt.2026.105203

Leina Hua , Shuai Zhang , Wei Ge

The Young–Laplace equation has been used widely to model the geometry and capillary force of a static bridge, which is solved frequently by toroidal approximation analytically, or integral and shooting methods numerically. In this work, the three methods were compared in terms of bridge shape profile, capillary force and rupture distance during the compression and elongation of a liquid bridge connecting two identical plates in various conditions of contact angle hysteresis. Results show different characteristics especially near bridge rupture: toroidal approximation has one solution branch, integral method predicts a saddle-node bifurcation with two solution branches, and shooting method tends to obtain more branches. The methods of bridge rupture distance calculation based on saddle-node bifurcation analysis, liquid–vapor area analysis, and energy analysis were also discussed. Minimization of system total interfacial energy considering a constant liquid volume as a constraint can stand as the unique criterion to determine the stable bridge configuration before bridge breakup and the bridge rupture distance. The validity of energy minimization was assessed by comparing the capillary force-separation distance curve between model predictions and measurements in the literature.

Young-Laplace方程被广泛用于模拟静力桥的几何和毛细力，通常采用环面近似解析法或积分法和射击法求解。在此工作中，比较了三种方法在不同接触角迟滞条件下连接两个相同板的液体桥在压缩和伸长过程中的桥形轮廓、毛细力和破裂距离。结果显示出不同的特征，特别是在桥梁破裂附近：环面近似有一个解分支，积分法预测一个有两个解分支的鞍节点分岔，而射击法倾向于获得更多的分支。讨论了基于鞍节点分岔分析、液汽面积分析和能量分析的桥梁断裂距离计算方法。以液体体积为约束的系统总界面能最小值可以作为确定桥梁破碎前稳定形态和桥梁破裂距离的唯一准则。通过比较模型预测和文献测量的毛细管力分离距离曲线，评估能量最小化的有效性。

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引用次数: 0

Evaluation of tortuosity: A radical tessellation-based method in porous spherical particle packing systems 弯曲度的评估：多孔球形颗粒填充系统中基于径向镶嵌的方法

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-21 DOI: 10.1016/j.apt.2026.105191

Zongli Chen, Chenzhe Li, Ying Zhao

Estimating the tortuosity of porous electrodes is important for understanding the performance of lithium-ion batteries and optimizing the design of electrode microstructures. In this work, an improved method for estimating the tortuosity of porous electrodes is proposed based on radical tessellation, and the results agree well with those calculated by empirical formulas and finite element simulations. Compared with empirical formulas, the proposed method can estimate tortuosity for more complicated microstructures, regardless of particle distribution and size dispersity; compared with finite element simulations, the proposed method offers a significant advantage in computational efficiency. Based on the method, the influence of different microstructure characters on the tortuosity is discussed. It is found that in addition to the porosity, the particle size and particle aggregation morphology are all critical in influencing the tortuosity of the porous electrode. Finally, the tortuosity obtained by this method is integrated into the Pseudo-2-dimension (P2D) model for the calculation of effective properties, and the results show that this method offers an efficient way in improving the prediction accuracy of P2D models.

估算多孔电极的弯曲度对于理解锂离子电池的性能和优化电极微结构设计具有重要意义。本文提出了一种基于径向镶嵌的多孔电极弯曲度估计方法，其计算结果与经验公式和有限元模拟结果吻合较好。与经验公式相比，该方法可以在不考虑颗粒分布和尺寸分散性的情况下估计更复杂的微观结构的扭曲度；与有限元模拟相比，该方法在计算效率上具有显著优势。在此基础上，讨论了不同微观结构特征对弯曲度的影响。研究发现，除孔隙率外，颗粒尺寸和颗粒聚集形态都是影响多孔电极弯曲度的关键因素。最后，将该方法得到的弯曲度整合到伪二维（P2D）模型中进行有效特性的计算，结果表明该方法为提高P2D模型的预测精度提供了一种有效的方法。

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引用次数: 0

Design and investigation on structural, dielectric and electrical features of novel ferrite based particulate composites 新型铁氧体基颗粒复合材料结构、介电特性及电学特性的设计与研究

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.apt.2026.105192

Khushboo Birra , Shraddha C. Shirbhate , Pranay R. Kautkar , Samir M. Khule , Sanjay B. Nagdeote , K. Pushpanjali Patra , Vishwajit M. Gaikwad

Zinc ferrite based (1-x)ZnFe₂O₄(ZFO)-xNiO(NO) (x = 0–40%) composites are synthesized via solid state sintering method. Structural studies reveal the lattice parameters of composites are significantly influenced by the interfacial strain induced at the interfaces of composites. Internal atomic surroundings of both ZFO and NO unit cells are getting modified by composite formation. FTIR spectra indicate structural stability without any structural modulation after the inclusion of NO phase into ZFO matrix. The homogeneous distribution of ZFO and NO grains with significant grain connectivity is noticed for all composite samples. Room temperature dielectric studies indicate the enhancement of dielectric constant and improvement in dielectric loss with the incorporation of NO phase into ZFO matrix. The low frequency dielectric constant values of composites follow effective medium approximation (EMA) model. The interfaces between ZFO and NO phases create conductive interfaces that are accountable for overall enhancement in electrical properties of composites.

采用固相烧结法合成了铁酸锌基（1-x）ZnFe2O4(ZFO)-xNiO(NO) （x = 0-40%）复合材料。结构研究表明，界面应变对复合材料的晶格参数有显著影响。ZFO和NO单元胞的内部原子环境都被复合材料的形成所改变。FTIR光谱表明，加入NO相后，ZFO基体结构稳定，无任何结构调制。ZFO和NO晶粒均匀分布，具有明显的晶粒连通性。室温介电特性研究表明，NO相掺入ZFO基体可以提高介电常数，改善介电损耗。复合材料的低频介电常数值遵循有效介质近似（EMA）模型。ZFO和NO相之间的界面产生导电界面，这是复合材料电性能整体增强的原因。

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引用次数: 0

Effect of counterpart material on glass particle morphology in binary component attrition milling evaluated by experiment and DEM simulation 通过实验和DEM模拟评价了双组份磨粒铣削过程中对应材料对玻璃颗粒形貌的影响

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-02-01 Epub Date: 2025-12-31 DOI: 10.1016/j.apt.2025.105150

Chiharu Tokoro , Yuki Murata , Yutaro Takaya , Hidehiro Kamiya , Kohei Komori , O Shourin

This study investigated the fragmentation of glass particles in binary mixtures with alumina, steel, and lead during attrition milling. The fragmentation kinetics, particle size distributions, and fragment morphologies were evaluated experimentally, and kinetic parameters were extracted using a population balance model. Discrete element method simulations clarified the dynamic interactions governing the material-dependent fragmentation. The results indicated that the mechanical properties of the counterpart materials strongly affected the collision intensity and fragment morphology. Alumina induces frequent high-energy collisions and efficient size reduction, producing irregular angular fragments. When lead was used, glass exhibited minimal fragmentation because the collision energy dissipated through plastic deformation during prolonged contact. Steel exhibited moderate fragmentation and generates fragments with low aspect ratios and high circularities suitable for recycling applications. The integration of experiments and simulations elucidated selective comminution mechanisms in heterogeneous systems and demonstrated that fragmentation efficiency and particle morphology can be tuned by the choice of counterpart material.

本研究考察了氧化铝、钢和铅二元混合物中玻璃颗粒在磨粒过程中的破碎情况。实验评估了破碎动力学、粒径分布和碎片形态，并利用种群平衡模型提取了动力学参数。离散元法模拟阐明了控制材料相关破碎的动态相互作用。结果表明，对应材料的力学性能对碰撞强度和碎片形貌有很大影响。氧化铝引起频繁的高能碰撞和有效的尺寸减小，产生不规则的角碎片。当使用铅时，玻璃表现出最小的碎片，因为碰撞能量在长时间接触期间通过塑性变形消散。钢表现出适度的破碎，产生的碎片具有低宽高比和高圆度，适合回收利用。实验和模拟的结合阐明了非均相系统中的选择性粉碎机制，并表明可以通过选择对应材料来调节破碎效率和颗粒形态。

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引用次数: 0

Neutron irradiation-enhanced orange-red emission in double perovskite phosphors for harsh radiation environments 中子辐照增强双钙钛矿荧光粉在恶劣辐射环境中的橙红色发射

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-02-01 Epub Date: 2026-01-12 DOI: 10.1016/j.apt.2026.105173

Noor Zamin Khan , Zhe Qin , Sayed Ali Khan , Anqi Lin , Zhuan Zhao , Muhammad Amin Padhiar , Zakir Ullah , Sonehra Anjum , Shimao Wang , Gang Meng

In this study, double perovskite

{C a}_{2} L u T a O_{6} : {S m}^{3 +}

oxide phosphors were subjected to 14 MeV neutron irradiation with a total fluence of 1 × 10¹³n/cm² to evaluate their performance for space applications. A detailed investigation of photoluminescence (PL), crystal structure, X-ray photoelectron spectroscopy (XPS), and surface morphology for pre- and post-exposure to neutron irradiation. The PL results demonstrated that neutron-irradiated samples exhibit a significantly higher luminescence intensity compared to their non-irradiated counterparts. Notably, the sample with an

0.05 {S m}^{3 +}

doping concentration showed over 15% increase in luminescence intensity for the orange-red emission, peaking at 603 nm under 407 nm excitation, following irradiation. This observation challenges the conventional belief that high-energy radiation invariably degrades optical properties. Our results reveal that neutron irradiation induces beneficial defects, such as oxygen vacancies and lattice distortions, which effectively suppress non-radiative recombination and enhance

{S m}^{3 +}

emission. Furthermore, the

{C a}_{2} L u T a O_{6} : {S m}^{3 +}

samples exhibit remarkable durability under neutron irradiation. The optical and structural characteristics indicate that

{S m}^{3 +}

-doped

{C a}_{2} L u T a O_{6}

is a promising orange-red phosphorescent material for applications in harsh radiative environments.

本研究对双钙钛矿Ca2LuTaO6:Sm3+氧化物荧光粉进行了14 MeV中子辐照，总辐照量为1 × 1013n/cm2，以评估其空间应用性能。详细研究了中子辐照前后的光致发光（PL）、晶体结构、x射线光电子能谱（XPS）和表面形貌。PL结果表明，中子辐照样品的发光强度明显高于未辐照样品。值得注意的是，当掺杂浓度为0.05Sm3+时，样品在407 nm激发下的橘红色发光强度增加了15%以上，在603 nm处达到峰值。这一观察结果挑战了高能辐射必然会降低光学性能的传统观念。结果表明，中子辐照可诱导氧空位和晶格畸变等有利缺陷，有效抑制非辐射复合，增强Sm3+发射。此外，Ca2LuTaO6:Sm3+样品在中子辐照下表现出显著的耐久性。光学和结构特性表明，Sm3+掺杂的Ca2LuTaO6是一种很有前途的在恶劣辐射环境下应用的橘红色磷光材料。

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引用次数: 0