Ceramics International最新文献_第2页

Synthesis and structural characterization of sodium and vanadium- stabilized cubic zirconia: Phase transitions and optical properties 钠钒稳定立方氧化锆的合成与结构表征：相变与光学性质

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.11.165

R. Casanova, M. Tapia, A. Solano-Peralta, A. Fernández-Osorio, M. Camacho

This work reports the synthesis of sodium and vanadium co-doped zirconia, resulting in the stabilized cubic zirconia phase (Na/VSZ). The general formula for the solid solution formed is Zr_1-2xV_xNa_xO_δ, where δ denotes the oxygen deficiency. Solid solutions with nominal compositions of x = 0.01, 0.03, and 0.06 were prepared via the sol-gel method, using zirconium(IV) propoxide solution (Zr(OCH₂CH₂CH₃)₄) and sodium metavanadate (NaVO₃) as precursors. The resulting gels were annealed at different temperatures. Annealing at 400 °C for 2 h produced highly crystalline cubic Na/VSZ nanoparticles, which transformed into the tetragonal phase at 610 °C and finally into the monoclinic phase after subsequent annealing at 900 °C. This method enabled the preparation of Na/VSZ nanopowders at a relatively low temperature compared to conventional ceramic methods. Sodium-vanadium stabilized zirconia (Na/VSZ) exhibits high structural stability compared to yttria-stabilized zirconia (YSZ), which is attributed to the high concentration of oxygen vacancies generated by the co-doping of Na⁺ and V⁴⁺. The band gap of Na/VSZ was estimated to be 3.02 eV, a value significantly lower than the 5.18 eV band gap reported for pure ZrO₂. XRD results indicated that the samples annealed at 400 °C consist of Na/VSZ with a cubic fluorite structure, which is maintained up to 570 °C. Rietveld refinements confirmed the incorporation of Na⁺ and V⁴⁺ ions into the 4a Wyckoff sites of the cubic zirconia lattice. EDX analysis verified the chemical composition of Na/VSZ. UV–Vis and EPR spectra revealed the presence of V⁴⁺ ions within the zirconia. Na/VSZ has potential for applications such as sensors, photocatalysts, electrolytes in solid oxide fuel cells (SOFCs), and components in electronic devices.

本文报道了钠钒共掺杂氧化锆的合成，得到了稳定的立方氧化锆相（Na/VSZ）。形成的固溶体的通式为Zr1-2xVxNaxOδ，其中δ表示氧缺乏度。以异丙酸锆（Zr(OCH2CH2CH3)4）和偏氰酸钠（NaVO3）为前驱体，采用溶胶-凝胶法制备了标称组成分别为x = 0.01、0.03和0.06的固溶体。得到的凝胶在不同的温度下退火。在400℃下退火2 h，得到了高度结晶的立方Na/VSZ纳米颗粒，在610℃时转变为四方相，在900℃退火后最终转变为单斜相。与传统的陶瓷方法相比，该方法可以在相对较低的温度下制备Na/VSZ纳米粉末。与钇稳定氧化锆（YSZ）相比，钠钒稳定氧化锆（Na/VSZ）具有更高的结构稳定性，这是由于Na+和V4+共掺杂产生了高浓度的氧空位。Na/VSZ的带隙估计为3.02 eV，明显低于纯ZrO2的5.18 eV带隙。XRD结果表明，400℃退火后的样品由具有立方萤石结构的Na/VSZ组成，并保持到570℃。Rietveld细化证实了Na+和V4+离子进入立方氧化锆晶格的4a Wyckoff位点。EDX分析证实了Na/VSZ的化学成分。紫外可见光谱和EPR光谱显示氧化锆中存在V4+离子。Na/VSZ在传感器、光催化剂、固体氧化物燃料电池（sofc）电解质和电子器件组件等方面具有潜在的应用前景。

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引用次数: 0

Enhancing energy storage performance of BNT-based ceramics under moderate fields through collaborative optimization of phase competition and domain engineering 通过相竞争和领域工程协同优化，提高bnt基陶瓷在中等电场下的储能性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.11.157

Naiji Zhou, Xiusheng Wu, Hongjuan Wen, Jufang Cao, Xinyu Yang, Hanlv Li

The inherent large residual polarization and low breakdown field strength of Bi_0.5Na_0.5TiO₃-based ceramics severely restrict their applications in energy storage capacitors for pulse power systems. At present, high recovery energy storage density (W_rec) is obtained under high electric fields (E > 400 kV/cm) and has strict practical application scenarios. In this work, (1-x)(Bi_0.5Na_0.5)TiO₃-xSr(Mg_1/3Ta_2/3)O₃ (BNT-xSMT) ceramics were prepared via the solid-state reaction method. TEM results demonstrate that the incorporation of SMT successfully induces the coexistence of R3c and P4bm phases, which significantly reduces the domain size inside the ceramics. Consequently, both high W_rec and energy storage efficiency (η) are simultaneously achieved under a moderate electric field. It is worth noting that all samples exhibited excellent dielectric temperature stability, with the dielectric constant varying by less than 15 % over the temperature range from room temperature to 350 °C. Among them, the BNT-0.3SMT ceramic achieved a high W_rec of 6.03 J/cm³ and η of 81.1 % under a moderate electric field of 380 kV/cm, accompanied by an ultrafast charge-discharge rate (t_0.9 = 16.6 ns), an extremely high current density (687.90 A/cm²), and a power density (55.03 MW/cm³). These findings provide a valuable reference for the miniaturized design of pulse power capacitors.

bi0.5 na0.5 tio3基陶瓷固有的大残余极化和低击穿场强严重限制了其在脉冲电力系统储能电容器中的应用。目前，高电场（E > 400 kV/cm）下可获得较高的回收储能密度（Wrec），具有严格的实际应用场景。本文采用固相反应法制备了（1-x）（Bi0.5Na0.5）TiO3-xSr(Mg1/3Ta2/3)O3 （BNT-xSMT）陶瓷。TEM结果表明，SMT的掺入成功诱导了R3c和P4bm相的共存，显著减小了陶瓷内部的畴尺寸。因此，在中等电场条件下，可以同时获得较高的Wrec和储能效率（η）。值得注意的是，所有样品都表现出优异的介电温度稳定性，在室温至350°C的温度范围内，介电常数的变化小于15%。其中，BNT-0.3SMT陶瓷在380 kV/cm的中等电场下，获得了6.03 J/cm3的高Wrec和81.1%的η值，并具有超快的充放电速率（t0.9 = 16.6 ns）、极高的电流密度（687.90 a /cm2）和55.03 MW/cm3的功率密度。这些研究结果为脉冲功率电容器的小型化设计提供了有价值的参考。

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引用次数: 0

Ultrathin SiO2 layer covered FeSiBCr amorphous soft magnetic composites for synchronously enhanced permeability and reduced core loss 超薄SiO2包覆FeSiBCr非晶软磁复合材料，可同步提高磁导率和降低磁芯损耗

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.11.159

Shuwei Ma, Tao Jing, Hanyu Yao, Xianguo Liu

Amorphous soft magnetic composites (ASMCs) require both high magnetic permeability and low loss to meet the demands of high-frequency applications. However, conventional insulation methods often reduce losses at the expense of magnetic permeability. An ultrathin SiO₂ layer is expected to improve the flowability of powders, achieving a higher density and thus enhancing permeability, on the other hand, to reduce loss induced by electrical isolation. In this study, core-shell structured FeSiBCr@SiO₂ powders were synthesized via the sol-gel method in an ethanol/aqueous solvent system. By regulating the hydrolysis and condensation reactions of tetraethyl orthosilicate, an optimized SiO₂ coating thickness of 5–20 nm was achieved. This ultrathin SiO₂ layer reduces the interparticle forces of FeSiBCr powder, promoting higher density. Enhanced permeability is based on a delicate balance: the positive contribution from increased density slightly exceeds the negative effect of magnetic dilution effect. Furthermore, ultrathin SiO₂ layer simultaneously reduces eddy current loss by isolating interparticle contact and lowers hysteresis loss by mitigating demagnetization field. The ultrathin SiO₂ endows FeSiBCr ASMCs good soft magnetic performances. As compared to FeSiBCr ASMCs, FeSiBCr@SiO₂ ASMCs deliver an effective permeability of 28.23 (an increase of 2.13 %),a core loss of 2254.9 mW/cm³ at 50 mT/1000 kHz (a reduction of 24.0 %) and 35.2 mW/cm³ at 5 mT/3 MHz, dropping 67.0 %。 The FeSiBCr@SiO₂ ASMCs have great potential for application in high-power electronic components requiring high efficiency and miniaturization.

非晶软磁复合材料（ASMCs）需要高磁导率和低损耗才能满足高频应用的要求。然而，传统的绝缘方法往往以降低磁导率为代价来减少损耗。超薄SiO2层有望改善粉末的流动性，实现更高的密度，从而提高渗透率，另一方面，减少电隔离引起的损耗。在本研究中，通过溶胶-凝胶法在乙醇/水溶剂体系中合成了核壳结构的FeSiBCr@SiO2粉末。通过调节正硅酸四乙酯的水解缩合反应，获得了最佳的SiO2涂层厚度为5 ~ 20 nm。这种超薄的SiO2层降低了FeSiBCr粉末的颗粒间作用力，提高了粉末的密度。磁导率的提高是基于一种微妙的平衡：密度增加的积极贡献略高于磁稀释效应的消极影响。此外，超薄SiO2层通过隔离颗粒间接触降低了涡流损耗，同时通过减小退磁场降低了磁滞损耗。超薄SiO2使FeSiBCr asmc具有良好的软磁性能。与FeSiBCr ASMCs相比，FeSiBCr@SiO2 ASMCs的有效磁导率为28.23（增加2.13%），在50 mT/1000 kHz时的堆芯损耗为2254.9 mW/cm3（降低24.0%），在5 mT/3 MHz时的堆芯损耗为35.2 mW/cm3，下降67.0%。FeSiBCr@SiO2 asmc在要求高效率和小型化的大功率电子元件中具有很大的应用潜力。

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引用次数: 0

Addressing processing limitations in SiC-based ceramic composites: A review of hybrid approaches and perspectives 解决sic基陶瓷复合材料的加工限制：混合方法和观点的回顾

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.10.067

Slavica Porobic Katnic , Mohammed Ammar Abdul Latheef , Keri Sharp , Ramona Naghi , Mark Olima , Hema Ramsurn , William LePage , Michael W. Keller

This review presents an up-to-date overview of hybrid processing techniques for silicon carbide (SiC) matrix composites. These materials are widely used in systems where high temperatures, mechanical stress, and oxidation are serious concerns, such as in aerospace and energy applications. Although there are well-established fabrication methods for SiC composites, such as chemical vapor infiltration (CVI), polymer infiltration and pyrolysis (PIP), and reactive melt infiltration (RMI), each has its limitations. For example, while PIP is relatively simple, it often results in residual porosity. Additionally, CVI can yield high-quality microstructures, but it is a slow process and may still leave behind microporosity. Furthermore, RMI can deliver high densities, but may also cause fiber damage or leave behind residual silicon. Given the individual limitations of CVI, PIP, and RMI, hybrid approaches may be deployed to gain the benefits of multiple techniques. Most commonly, CVI and PIP are combined for hybrid processing, but other combinations of CVI, PIP, and RMI are possible. This review discusses how these combined processes are applied to various SiC-matrix composites, including carbon fibers in SiC matrix (C_f/SiC), carbon fibers in a matrix of C and SiC (C_f/C–SiC), and SiC fibers in SiC matrix (SiC_f/SiC). The main contribution of this review is summarizing how hybrid techniques influence porosity, microstructure, fiber–matrix bonding, and the overall thermal–mechanical properties. Many recent studies are also included in the topics of improved fiber architectures, polymer chemistries, and infiltration steps. While hybrid methods often lead to improved properties, there are still open questions, especially regarding internal oxygen from PIP, long processing times for CVI, and phase stability after many cycles at high temperatures. This review concludes with potential future directions for research efforts to make hybrid SiC-matrix processes more effective, scalable, and reliable.

本文综述了碳化硅（SiC）基复合材料杂化加工技术的最新进展。这些材料广泛应用于高温、机械应力和氧化等严重问题的系统中，例如航空航天和能源应用。SiC复合材料的制备方法有化学蒸汽渗透（CVI）、聚合物渗透热解（PIP）和反应熔体渗透（RMI）等，但各有其局限性。例如，虽然PIP相对简单，但通常会导致残余孔隙度。此外，CVI可以产生高质量的微观结构，但这是一个缓慢的过程，仍然可能留下微孔隙。此外，RMI可以提供高密度，但也可能导致光纤损坏或留下残余硅。考虑到CVI、PIP和RMI各自的局限性，可以部署混合方法以获得多种技术的好处。最常见的是，将CVI和PIP结合起来进行混合处理，但CVI、PIP和RMI的其他组合也是可能的。本文讨论了这些组合工艺如何应用于各种SiC基复合材料，包括SiC基碳纤维（Cf/SiC）、C- SiC基碳纤维（Cf/C - SiC）和SiC基SiC纤维（SiCf/SiC）。这篇综述的主要贡献是总结了混合技术如何影响孔隙率、微观结构、纤维-基体结合和整体热力学性能。许多最近的研究也包括在改进纤维结构、聚合物化学和渗透步骤的主题中。虽然混合方法通常可以改善性能，但仍然存在一些悬而未决的问题，特别是PIP的内部氧气，CVI的处理时间长，以及在高温下多次循环后的相稳定性。本文总结了未来研究工作的潜在方向，使混合sic基质工艺更有效、可扩展和可靠。

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引用次数: 0

Microstructural tuning of the core–rim structure and wear resistance of Ti(C,N)-based cermets by Si3N4 additions 添加Si3N4对Ti（C，N）基陶瓷芯缘结构和耐磨性的微结构调整

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.10.454

Ali Elgazzar , Sheng-Jian Zhou , Jia-Hu Ouyang , Zhan-Guo Liu , Yu-Jin Wang , Lei Chen

This study investigates the influence of Si₃N₄ additions (0–6 wt%) on the microstructure and tribological performance of Ti(C,N)-based cermets fabricated by powder metallurgy and vacuum sintering. Microstructural characterization using SEM, TEM, EDS, and XRD revealed that 2 wt% Si₃N₄ (SN2 sample) promoted a refined, uniform core–rim structure with smoother elemental transitions and reduced d-spacing. The SN2 sample exhibited optimal fracture toughness (10.82 MPa m^1/2), adequate hardness (1494 kgf/mm²), and high transverse rupture strength (1425 MPa). Ball-on-disk tests using Al

_{2}

O

_{3}

counter balls showed the lowest coefficient of friction (0.45) and wear rate (2.3 ×10⁻⁶ mm³/(N m)) for SN2 sample, attributed to improved grain boundary integrity and stable tribolayer formation. In contrast, 6 wt% Si₃N₄ led to surface damage and decreased wear resistance. These results emphasize the critical role of additive optimization in enhancing the mechanical and tribological properties of Ti(C,N)-based cermets for advanced cutting tool applications.

研究了氮化硅添加量（0 ~ 6 wt%）对粉末冶金真空烧结制备Ti（C，N）基陶瓷显微组织和摩擦学性能的影响。利用SEM、TEM、EDS和XRD对样品进行微观结构表征，结果表明，2 wt%的Si3N4 （SN2样品）促进了精细、均匀的核心-边缘结构，元素转变更平滑，d-间距更小。SN2样品具有最佳的断裂韧性（10.82 MPa m1/2），适当的硬度（1494 kgf/mm2）和较高的横向断裂强度（1425 MPa）。使用Al2O3计数球进行的球盘测试显示，SN2样品的摩擦系数最低（0.45），磨损率最低（2.3 ×10−6 mm3/(N m)），这归因于晶界完整性的改善和稳定的摩擦层形成。相比之下，6 wt%的Si3N4导致表面损伤和耐磨性下降。这些结果强调了添加剂优化在提高Ti（C，N）基金属陶瓷的机械和摩擦学性能方面的关键作用。

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引用次数: 0

Microstructural regulation and oil–water separation performance of mullite whisker porous ceramics derived from secondary aluminum dross 铝渣莫来石晶须多孔陶瓷的微观结构调控及油水分离性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.10.459

Zhaoyang Liu , Ao Liu , Yuqing Gao , Junyang Wang , Zhengguo Yan , Tianpeng Wen , Lei Yuan

The exponential accumulation of secondary aluminum dross (SAD) results in severe resource waste and significant environmental hazards. Moreover, oil-in-water (O/W) emulsions from the petroleum, metallurgical, and food industries require efficient separation method, which are often limited by low efficiency and secondary pollution. To address these challenges, this study focused on converting SAD to high-value materials and developing low-cost, high-performance oil–water separation ceramic. Specifically, mullite whisker-reinforced porous ceramics were fabricated from SAD, via solid-state sintering and then modified with 3-aminopropyltriethoxysilane (KH550) and dopamine. The effects of sintering regimes and catalysts on the microstructure and properties of the ceramics were systematically investigated. The results revealed that the two-step sintering of MoO₃-containing samples at 1400 °C produced porous ceramics with a three-dimensional mullite whisker network, a porosity of 47.5 % and an underwater oil contact angle of 142°. After surface modification, the contact angle increased to 167°. The modified ceramics maintained a separation efficiency of over 93.5 % for soybean O/W emulsion within 20 min and a permeation flux of 370.5 L m⁻² h⁻¹ at 0.2 MPa. This study provides a cost-effective strategy for recycling SAD and developing advanced O/W separation material, contributing to resource management, environmental sustainability, and a circular economy.

二次铝渣的指数积累造成了严重的资源浪费和环境危害。此外，石油、冶金和食品工业的水包油乳剂需要高效的分离方法，但往往受到效率低和二次污染的限制。为了应对这些挑战，本研究的重点是将SAD转化为高价值材料，并开发低成本、高性能的油水分离陶瓷。采用固态烧结法制备莫来石晶须增强多孔陶瓷，并用3-氨基丙基三乙氧基硅烷（KH550）和多巴胺对其进行改性。系统地研究了烧结制度和催化剂对陶瓷微观结构和性能的影响。结果表明：含moo3样品在1400℃下两步烧结制备的多孔陶瓷具有三维莫来石晶须网络，孔隙率为47.5%，水下油接触角为142°；表面改性后，接触角增大到167°。改性陶瓷对大豆O/W乳液的分离效率在20 min内保持在93.5%以上，在0.2 MPa下的渗透通量为370.5 L m−2 h−1。本研究提供了一种具有成本效益的策略来回收SAD和开发先进的O/W分离材料，有助于资源管理，环境可持续性和循环经济。

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引用次数: 0

Laser direct energy deposited Ni60WC-xG@Cu coatings: Synergistic behaviors of tribocorrosion and electrochemical corrosion 激光直接能量沉积Ni60WC-xG@Cu涂层：摩擦腐蚀和电化学腐蚀的协同行为

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.11.217

Kaiwei Zhang, Dejun Kong

G@Cu was added into Ni60WC coating using a laser direct energy deposition, and the tribocorrosion and electrochemical properties were analyzed, which revealed the synergistic mechanism of wear resistance and corrosion resistance. The results indicate that the average coefficients of friction and wear rates of Ni60WC-xG@Cu coatings decrease as the G@Cu content increases, and the wear mechanism is changed from adhesive wear-abrasive wear to abrasive wear-pitting corrosion. The introduction of G@Cu particles optimized the microstructure of Ni60WC-xG@Cu coating, and the distribution of WC in the coatings is improved, enhancing the hardness and toughness of coatings. Moreover, the corrosion current densities of Ni60WC-xG@Cu coatings are reduced by the addition of G@Cu; while the charge transfer resistance is opposite, which is caused by the G film and “maze” effect. The appropriate amount of G@Cu promotes the formation of lubricating film and reduces wear rate and corrosion degree, improving the tribocorrosion resistance and electrochemical resistance ability of coatings.

采用激光直接能量沉积法将G@Cu加入到Ni60WC涂层中，并对其摩擦腐蚀性能和电化学性能进行了分析，揭示了耐磨损和耐腐蚀的协同机理。结果表明：Ni60WC-xG@Cu涂层的平均摩擦系数和磨损率随G@Cu含量的增加而降低，磨损机制由黏着磨损-磨粒磨损转变为磨粒磨损-点蚀磨损；G@Cu颗粒的引入优化了Ni60WC-xG@Cu涂层的微观结构，改善了WC在涂层中的分布，提高了涂层的硬度和韧性。此外，G@Cu的加入降低了Ni60WC-xG@Cu涂层的腐蚀电流密度；而电荷传递阻力相反，这是由G膜和“迷宫”效应造成的。适量的G@Cu促进了润滑膜的形成，降低了磨损速率和腐蚀程度，提高了涂层的耐摩擦腐蚀和耐电化学能力。

引用次数: 0

Crystal-surface-regulated SnO2 sensors for specific detection of n-butanol and simple differentiation for isomers and homologs 晶体表面调节的SnO2传感器，用于正丁醇的特定检测和对异构体和同源物的简单区分

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.11.144

Panxiang Ma, Jing Cao, Yangfan Ou, Yong Pei

In this work, SnO₂ was prepared by hydrothermal method and annealed at 550 °C. Through XRD characterization and BET measurement, it can be found that the addition of NH₄F can guide the growth of the (110) crystal plane and the increase of the specific surface of SnO₂. The results showed that the response of SnO₂ to n-butanol was increased from 190.46 to 354.11 after NH₄F modification, and the detection limit was 2.82 ppb. The calculation of DFT adsorption energy provides direct and valid evidence for this. To further test whether the sensor can effectively distinguish for the homologs and isomers of n-butanol, the reciprocal of the lowest resistance is substituted for the magnitude of the response value in the response recovery curve. Moreover, the electron effect and steric hindrance effect can be reasonably explained for the response value of the target molecule.

本文采用水热法制备了SnO2，并在550℃下进行了退火。通过XRD表征和BET测量可以发现，NH4F的加入可以引导（110）晶面的生长和SnO2比表面积的增加。结果表明，NH4F改性后，SnO2对正丁醇的响应由190.46提高到354.11，检出限为2.82 ppb。DFT吸附能的计算为这一点提供了直接有效的证据。为了进一步测试传感器是否能有效区分正丁醇的同系物和异构体，在响应恢复曲线中用最小电阻的倒数代替响应值的大小。此外，电子效应和位阻效应可以合理地解释靶分子的响应值。

引用次数: 0

Microstructural and biological wear behaviour of hybrid reinforced AZ91D alloy surface composite fabricated by friction stir processing technique 搅拌摩擦工艺制备混杂增强AZ91D合金表面复合材料的组织与生物磨损性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.11.171

Surendra Kumar Patel , Sudesh Singh , Lei Shi , Lu Liu , Xiang Zhang , Lei Guan , Velaphi Msomi

This study fabricated hybrid-reinforced AZ91D Mg-alloy surface composites via friction stir processing. Microstructural analysis revealed significant grain refinement, a high dislocation density, dynamic recrystallization, and crystallographic texture, evidenced by aligned Mg (11–20) and (0002) planes.Wear behavior was evaluated using ball-on-disc tests (5N load, 5Hz, 900s) against ZrO₂, Si₃N₄, and SS440 balls. Both materials exhibited comparatively higher wear rates and coefficients of friction when tested against the SS440 ball, relative to the ceramic counterparts. XRD analysis revealed the emergence of a distinct (33–60) Mg plane in the composites, attributed to ZnO grain alignment, whereas the other Mg diffraction peaks remained unchanged. Notably, the FSP composite demonstrated superior wear resistance against the SS440 ball. This was evidenced by reduced grooving, cracking, delamination, and limited oxide formation. SEM/EDS analyses correlated this improvement to mitigated abrasive wear and enhanced interfacial stability, confirming FSP's role in tailoring tribological performance for varying contact conditions.

采用搅拌摩擦法制备混合增强AZ91D镁合金表面复合材料。显微组织分析显示，晶粒细化、位错密度高、动态再结晶和晶体织构明显，表现为排列的Mg（11-20）和（0002）平面。对ZrO2、Si3N4和SS440球进行球盘试验（5N载荷，5Hz， 900秒），评估磨损行为。与陶瓷材料相比，两种材料在SS440球上的磨损率和摩擦系数都相对较高。XRD分析表明，复合材料中出现了一个明显的（33-60）Mg平面，这是ZnO晶粒取向造成的，而其他Mg衍射峰保持不变。值得注意的是，FSP复合材料对SS440球具有优异的耐磨性。这可以通过减少沟槽、开裂、分层和有限的氧化物形成来证明。SEM/EDS分析表明，这种改进可以减轻磨料磨损，增强界面稳定性，证实了FSP在不同接触条件下定制摩擦学性能方面的作用。

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引用次数: 0

Enhancing the energy storage performance of Pb0.9La0.1Zr0.7Ti0.3O3 with linear dielectric behavior 提高具有线性介电行为的Pb0.9La0.1Zr0.7Ti0.3O3的储能性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-12-01 DOI: 10.1016/j.ceramint.2025.11.223

Peng Chen , Xiaokuo Er , Xiaobo Yu , Shucheng Hou , Hong Zhao , Yang Bai , Qian Zhan

The microstructure of dielectric films prepared by the sol-gel method can be efficiently customized by employing appropriate heat treatment processes and selecting suitable electrode materials, which represents a key technique for controlling the macroscopic performance of functional materials. In contrast to the layer-by-layer annealing approach, the one-step annealing method results in a lower degree of crystallinity. Pt and LaNiO₃ (LNO) are commonly used electrodes in perovskite oxide films, with the Pt electrode favoring stabilization of the intermediate pyrochlore phase over the LNO electrode due to the distinct crystal structure mismatch between Pt and the perovskite structure. In this study, the Pb_0.9La_0.1Zr_0.7Ti_0.3O₃ (PLZT) nanocomposite film composed of the ultra-fine pyrochlore nanocrystals (<10 nm) and amorphous matrix was successfully fabricated on Pt(111)/Ti/SiO₂/Si (PLZT-Pt) substrate by employing a simple one-step annealing process. This unique architecture disrupts long-range order, suppresses domain-wall coupling loss, and elevates breakdown strength (4.85 MV/cm). As a result, the PLZT-Pt film exhibits desirable linear dielectric behavior with minimal remanent polarization (2.3 μC/cm²) and low leakage current (∼10⁻⁸A/cm²). Compared to the one-step annealed PLZT-LNO, the recoverable energy storage density (W_rec ∼ 48.1 J/cm³) and energy storage efficiency (η ∼ 79.5 %) have been enhanced by 46 % and 32 % respectively. Meanwhile, it demonstrates excellent energy storage stability across a temperature range of 30 °C–130 °C and remarkable cycling reliability (up to 10⁶ cycles). This study demonstrates that optimizing energy storage performance through microstructure modulation offers a straightforward yet highly effective strategy.

通过采用合适的热处理工艺和选择合适的电极材料，可以有效地定制溶胶-凝胶法制备的介电膜的微观结构，这是控制功能材料宏观性能的关键技术。与逐层退火方法相反，一步退火方法导致结晶度较低。Pt和LaNiO3 （LNO）是钙钛矿氧化物膜中常用的电极，由于Pt和钙钛矿结构之间明显的晶体结构不匹配，Pt电极比LNO电极更有利于中间焦绿石相的稳定。本研究采用简单的一步退火工艺，在Pt(111)/Ti/SiO2/Si （PLZT-Pt）衬底上成功制备了由超细焦绿石纳米晶体（<10 nm）和非晶基体组成的Pb0.9La0.1Zr0.7Ti0.3O3 （PLZT）纳米复合薄膜。这种独特的结构破坏了远程秩序，抑制了畴壁耦合损耗，并提高了击穿强度（4.85 MV/cm）。结果表明，PLZT-Pt薄膜具有良好的线性介电性能，剩余极化最小（2.3 μC/cm2），漏电流低（~ 10−8A/cm2）。与一步退火的PLZT-LNO相比，可回收储能密度（Wrec ~ 48.1 J/cm3）和储能效率（η ~ 79.5%）分别提高了46%和32%。同时，它在30°C - 130°C的温度范围内表现出出色的储能稳定性和卓越的循环可靠性（高达106次循环）。该研究表明，通过微结构调制优化储能性能提供了一种简单而高效的策略。

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引用次数: 0