Carbon最新文献 - Book学术

Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required 外部封面-期刊名称，封面图片，卷刊细节，ISSN，封面日期，爱思唯尔标志和学会标志（如果需要）

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-05 DOI: 10.1016/S0008-6223(25)01134-0

引用次数: 0

Knowledge-aided automated analysis of dielectric loss mechanism on core-shell VN@N-rGO nanobelts with broadband microwave absorption performance 具有宽带微波吸收性能的核-壳纳米带VN@N-rGO介电损耗机理的知识辅助自动化分析

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-04 DOI: 10.1016/j.carbon.2025.121125

Yanfeng Li, Linyue Hu, Wenmiao Wang, Pan Luo, Yang Yang, Huacheng Zhu, LiPing Yan, Yanping Zhou

Understanding the microwave dissipation mechanisms in materials is essential for the design of high-performance absorbers. Previous studies in this field have largely relied on a single-order Debye model combined with nonlinear least squares (NLLS) fitting, under the assumption of frequency-independent conductivity. However, this approach presents several limitations, including limited applicability to composite materials, inaccuracies in conductivity estimation, high sensitivity to initial guesses, and challenges in determining relaxation times. To address these issues, a multi-order Debye model that integrates Jonscher's power-law dielectric response, thereby establishing a frequency-dependent relationship for conductivity, is developed as the analytical framework. Subsequently, a distribution of relaxation times (DRT) method with Tikhonov regularization is developed to extract polarization relaxation times, with its parameter optimized based on the materials' physicochemical properties. Furthermore, a genetic algorithm (GA)-assisted NLLS fitting procedure is implemented for complex permittivity modeling, which facilitates escape from local minima and improves the likelihood of finding global optima. Dielectric analysis of the synthesized VN@N-rGO core-shell nanobelts indicates a significant synergy between the components, enhancing both conductive and polarization losses. The hybridization increases the equivalent dipole relaxation times of N-rGO, thereby aligning them more closely with the period of 2–18 GHz microwaves and thus improving polarization loss. By optimizing the VN/N–rGO ratio and layer structure, an effective absorption bandwidth of 7.7 GHz is achieved at 2.1 mm.

了解材料中的微波耗散机制是设计高性能吸收材料的必要条件。以往的研究在很大程度上依赖于单阶Debye模型结合非线性最小二乘（NLLS）拟合，假设电导率与频率无关。然而，这种方法存在一些局限性，包括对复合材料的适用性有限，电导率估计不准确，对初始猜测的灵敏度高，以及在确定弛豫时间方面存在挑战。为了解决这些问题，开发了一个多阶Debye模型，该模型集成了Jonscher的幂律介电响应，从而建立了电导率的频率依赖关系，作为分析框架。随后，提出了一种基于Tikhonov正则化的弛豫时间分布（DRT）方法来提取极化弛豫时间，并根据材料的物理化学性质对其参数进行了优化。在此基础上，采用遗传算法辅助NLLS拟合复杂介电常数模型，避免了局部极小值的出现，提高了找到全局最优点的可能性。对合成的VN@N-rGO核壳纳米带的介电分析表明，各组分之间存在显著的协同作用，增加了导电和极化损耗。杂化增加了N-rGO的等效偶极子弛豫时间，从而使其与2-18 GHz微波周期更接近，从而改善了极化损耗。通过优化VN/ N-rGO比和层结构，在2.1 mm处实现了7.7 GHz的有效吸收带宽。

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引用次数: 0

Direct and scalable dual-laser writing of 3D graphene–MoS2 architectures for high-efficiency pH-universal hydrogen electrocatalysis 用于高效ph -通用氢电催化的三维石墨烯- mos2结构的直接和可扩展双激光写入

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-04 DOI: 10.1016/j.carbon.2025.121139

Achraf Berni , Abdelghani Ghanam , Juan José García-Guzmán , José María Palacios-Santander , Aziz Amine , Laura Cubillana-Aguilera , Fouad Ghamouss

The rational design of bifunctional electrocatalysts capable of operating efficiently under both acidic and alkaline conditions remains a critical challenge for hydrogen evolution reaction (HER) technologies. Herein, we report a novel, rapid, and scalable dual-laser approach for the in-situ synthesis of MoS₂ nanostructures embedded within three-dimensional (3D) laser-induced graphene (LIG) frameworks for efficient HER electrocatalysis. Leveraging the complementary and synergistic capabilities of CO₂ (10.6 μm) and blue near-UV (450 nm) lasers, this method enables maskless, binder-free, and chemical-free fabrication of LIG/MoS₂ hybrid electrocatalysts under ambient conditions. The CO₂ laser induces rapid graphitization of polyimide sheets into a highly 3D porous and conductive graphene-like structure. The UV laser facilitates localized and gentle energy-efficient crystallization of MoS₂ catalyst from Mo/S precursors, yielding a uniform, well-integrated, and cross-linked 3D nanoarray architecture. Structural, morphological, and electrochemical characterizations confirmed the synergistic effect of the dual-laser process. The optimal hybrid catalysts LIG_UV–MoS_2UV and LIG_CO2–MoS_2UV, exhibited outstanding HER electrocatalytic activity, achieving low overpotentials of 242 and 233 mV in 1 M KOH and 0.5 M H₂SO₄, respectively, at 10 mA cm⁻², along with excellent durability and reaction kinetics. This study introduces a novel, sustainable and industry-compatible platform for designing advanced multifunctional HER catalysts, advancing clean energy applications.

合理设计能够在酸性和碱性条件下高效运行的双功能电催化剂是析氢反应（HER）技术面临的关键挑战。在此，我们报告了一种新颖，快速，可扩展的双激光方法，用于原位合成嵌入三维（3D）激光诱导石墨烯（LIG）框架中的MoS2纳米结构，以实现高效的HER电催化。利用CO2 （10.6 μm）和蓝色近紫外（450 nm）激光器的互补和协同能力，该方法可以在环境条件下无掩膜、无粘结剂和无化学物质制备LIG/MoS2杂化电催化剂。CO2激光诱导聚酰亚胺片快速石墨化成高度三维多孔和导电的类石墨烯结构。紫外激光促进Mo/S前驱体的MoS2催化剂的局部和温和的节能结晶，产生均匀，良好集成和交联的3D纳米阵列结构。结构、形态和电化学表征证实了双激光工艺的协同效应。最佳混合催化剂LIGUV-MoS2UV和LIGCO2-MoS2UV表现出优异的HER电催化活性，在10 mA cm−2条件下，在1 M KOH和0.5 M H2SO4条件下分别达到242和233 mV的低过电位，并且具有良好的耐久性和反应动力学。本研究介绍了一种新颖的、可持续的、工业兼容的平台，用于设计先进的多功能HER催化剂，推进清洁能源的应用。

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引用次数: 0

Asymmetric multistage composite foams for high-efficient absorption-dominant electromagnetic interference shielding exploited with aid of machine learning 基于机器学习的非对称多级复合泡沫高效吸收型电磁干扰屏蔽

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-04 DOI: 10.1016/j.carbon.2025.121129

Lingjun Zeng , Yu Zhang , Lan Xie , Bai Xue , Qiang Zheng

High-efficient absorption-dominant electromagnetic interference (EMI) shielding materials with both ultra-high total EMI shielding effectiveness (SE_T > 100 dB) and absorption coefficient (A>0.95) as ideal “green” shielding materials are imminently demanded yet scarcely reported for minimizing secondary EMI radiation pollution. Herein, pyrolytic carbon nanotube (CNT)@FeCo/CNT/silver-coated tetra-needle-like zinc oxide whisker/poly (l-lactic acid) (CNT@FeCo-700/CNT/T-ZnO@Ag/PLA) composite foams were successfully fabricated based on a conductivity-gradient modular design. The rational layout of the gradient conductive network structures of CNT@FeCo-700/PLA, CNT/PLA, and T-ZnO@Ag/PLA layers enables the “strong absorption-weak absorption-reflection-reabsorption” shielding mechanism. The optimized foam features an ultra-high average EMI SE_T of 104.02 dB, including an absorption SE (SE_A) of 103.95 dB and a reflection SE (SE_R) of only 0.07 dB. Notably, its average absorption coefficient (A) reaches 0.984 (the maximum value of 0.998), surpassing most of the EMI shielding composites reported to date. By learning the experimental datasets of EMI SE_T and A at different frequency, Fully Connected Neural Networks (FCNN) exhibits excellent prediction accuracy on unseen samples, with average Root Mean Square Error (RMSE) values of only 1.251 and 0.014 for EMI SE_T and A, and average errors of less than 2.82 % and 1.52 % for EMI SE_T and A, respectively, suggesting that it is highly applicable for this work and can effectively reduce the experimental costs. This work offers an innovative strategy for fabricating high-efficient absorption-dominant EMI shielding materials and reduce experimental consumption.

作为理想的“绿色”屏蔽材料，具有超高的电磁干扰总屏蔽效率（SET > 100 dB）和吸收系数（A>0.95）的高效吸收型电磁干扰屏蔽材料是迫切需要的，但很少报道，以减少二次EMI辐射污染。本文基于电导率梯度模块化设计，成功制备了热解碳纳米管（CNT）@FeCo/CNT/镀银四针状氧化锌晶须/聚乳酸（CNT@FeCo-700/CNT/T-ZnO@Ag/PLA）复合泡沫。通过对CNT@FeCo-700/PLA、CNT/PLA和T-ZnO@Ag/PLA层梯度导电网络结构的合理布局，实现了“强吸-弱吸-反射-重吸”的屏蔽机制。优化后的泡沫具有104.02 dB的超高平均EMI SET，其中吸收SE （SEA）为103.95 dB，反射SE （SER）仅为0.07 dB。值得注意的是，其平均吸收系数(A)达到0.984（最大值0.998），超过了目前报道的大多数电磁干扰屏蔽复合材料。通过学习不同频率的EMI SET和A实验数据集，全连接神经网络（Fully Connected Neural Networks， FCNN）在未见样本上表现出优异的预测精度，EMI SET和A的平均均方根误差（RMSE）分别为1.251和0.014，EMI SET和A的平均误差分别小于2.82%和1.52%，表明该方法非常适用于本工作，可以有效降低实验成本。这项工作为制造高效吸收型电磁干扰屏蔽材料和降低实验消耗提供了一种创新策略。

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引用次数: 0

Robust and superhydrophobic fabric with polymeric MXene/FeSiAl-wrapped Ag yarns for broadband electromagnetic absorption 坚固和超疏水织物与聚合物MXene/ fesal包裹Ag纱线宽带电磁吸收

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-04 DOI: 10.1016/j.carbon.2025.121130

Ruobing Cao, Xiaoning Zhao, Yiman Lu, Ya Lin, Zhongqiang Wang, Ye Tao, Haiyang Xu, Yichun Liu

The design of electromagnetic absorbing fabric is generating growing interest in wearable electronics. This work develops a robust and superhydrophobic fabric with polymeric MXene/FeSiAl (MFSA)-wrapped Ag yarns through grafting and electrospinning. Such a distinctive geometric structure of the yarns facilitates multiple electromagnetic wave attenuation, endowing the fabric with good microwave absorption (MA) performance. The fabric exhibits the minimum reflection loss of −52.52 dB at 2 mm thickness and effective absorption bandwidth of 6.13 GHz at 2.65 mm thickness with low MFSA loading (5 wt%). In addition, the fabric also exhibits good mechanical stability and self-cleaning ability under repeated stretching or washing. This work provides a MA fabric material for potential wearable electronics and stealth applications.

电磁吸收织物的设计引起了人们对可穿戴电子产品越来越大的兴趣。本研究通过接枝和静电纺丝的方法，开发了一种由MXene/ fesal （MFSA）包裹的Ag纱线制成的坚固的超疏水织物。这种独特的纱线几何结构有利于多重电磁波的衰减，使织物具有良好的微波吸收性能。在低MFSA载荷（5 wt%）下，该织物在2 mm厚度时的反射损耗最小为- 52.52 dB，在2.65 mm厚度时的有效吸收带宽为6.13 GHz。此外，织物在反复拉伸或洗涤下也表现出良好的机械稳定性和自清洁能力。这项工作为潜在的可穿戴电子产品和隐形应用提供了一种MA织物材料。

引用次数: 0

Environmentally-friendly CoxNiy/carbon hybrid aerogels with dielectric and magnetic coupling network for highly efficient radar/infrared compatibility 环保的CoxNiy/碳混合气凝胶，具有电介质和磁耦合网络，具有高效的雷达/红外兼容性

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-03 DOI: 10.1016/j.carbon.2025.121126

Weihua Gu , Xin Tan , Zhentao Luo , Ziming Chen , Chuancheng Sun , Ailin Xia

With the rapid development of multi-frequency electromagnetic detection technology, developing microwave absorbing materials compatible with infrared stealth has become a key research focus. This paper details the fabrication of cobalt-nickel salts/chitosan derived 3D porous Co_xNi_y/carbon aerogels (CA-Co_xNi_y), achieved via freeze-drying and high-temperature calcination. The superb radar stealth performance exhibits the minimum reflection loss (RL_min) of −62.09 dB within the C-band and the maximum effective absorption bandwidth of 4.05 GHz at only 1.65 mm. This excellent property can be ascribed to the 0D magnetic particles loaded on 3D porous continuous skeletons with abundant interfaces, which can promote multiple internal reflections, conduction loss, interfacial polarization, and impedance matching. Through computer simulation technology, the radar cross section under different electromagnetic wave incidence directions is studied, and the interaction law between electric field distribution, power loss density and electromagnetic wave energy loss is also analyzed. Furthermore, CA-Co₅Ni₅ showcases low infrared emissivity, measuring merely 0.785 in the 3–5 μm band and 0.729 in the 8–14 μm band, significantly reducing thermal radiation and enhancing thermal insulation capability. This investigation offers a valuable new perspective for the development of high-performance materials that are compatible with microwave absorption and infrared stealth, which are vital for aerospace and military protection applications.

随着多频电磁探测技术的迅速发展，开发兼容红外隐身的吸波材料已成为研究热点。本文详细介绍了通过冷冻干燥和高温煅烧制备钴镍盐/壳聚糖衍生的三维多孔CoxNiy/碳气凝胶（CA-CoxNiy）。c波段的最小反射损耗（RLmin）为- 62.09 dB，在1.65 mm处的最大有效吸收带宽为4.05 GHz，具有优异的雷达隐身性能。这种优异的性能可以归因于0D磁颗粒加载在具有丰富界面的三维多孔连续骨架上，可以促进多次内反射、传导损耗、界面极化和阻抗匹配。通过计算机仿真技术，研究了不同电磁波入射方向下的雷达截面，分析了电场分布、功率损耗密度与电磁波能量损耗之间的相互作用规律。此外，CA-Co5Ni5具有较低的红外发射率，在3-5 μm波段仅为0.785，在8-14 μm波段仅为0.729，显著降低了热辐射，增强了隔热能力。这项研究为开发兼容微波吸收和红外隐身的高性能材料提供了一个有价值的新视角，这对航空航天和军事防护应用至关重要。

{"title":"Environmentally-friendly CoxNiy/carbon hybrid aerogels with dielectric and magnetic coupling network for highly efficient radar/infrared compatibility","authors":"Weihua Gu , Xin Tan , Zhentao Luo , Ziming Chen , Chuancheng Sun , Ailin Xia","doi":"10.1016/j.carbon.2025.121126","DOIUrl":"10.1016/j.carbon.2025.121126","url":null,"abstract":"<div><div>With the rapid development of multi-frequency electromagnetic detection technology, developing microwave absorbing materials compatible with infrared stealth has become a key research focus. This paper details the fabrication of cobalt-nickel salts/chitosan derived 3D porous Co<sub>x</sub>Ni<sub>y</sub>/carbon aerogels (CA-Co<sub>x</sub>Ni<sub>y</sub>), achieved via freeze-drying and high-temperature calcination. The superb radar stealth performance exhibits the minimum reflection loss (RL<sub>min</sub>) of −62.09 dB within the C-band and the maximum effective absorption bandwidth of 4.05 GHz at only 1.65 mm. This excellent property can be ascribed to the 0D magnetic particles loaded on 3D porous continuous skeletons with abundant interfaces, which can promote multiple internal reflections, conduction loss, interfacial polarization, and impedance matching. Through computer simulation technology, the radar cross section under different electromagnetic wave incidence directions is studied, and the interaction law between electric field distribution, power loss density and electromagnetic wave energy loss is also analyzed. Furthermore, CA-Co<sub>5</sub>Ni<sub>5</sub> showcases low infrared emissivity, measuring merely 0.785 in the 3–5 μm band and 0.729 in the 8–14 μm band, significantly reducing thermal radiation and enhancing thermal insulation capability. This investigation offers a valuable new perspective for the development of high-performance materials that are compatible with microwave absorption and infrared stealth, which are vital for aerospace and military protection applications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"248 ","pages":"Article 121126"},"PeriodicalIF":11.6,"publicationDate":"2025-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemically synthesized MXenes as sustainable solid lubricants: Mechanistic insights into tribofilm formation and interfacial dynamics 电化学合成MXenes作为可持续固体润滑剂：摩擦膜形成和界面动力学的机理见解

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-03 DOI: 10.1016/j.carbon.2025.121136

Marko Piljević , Markus Ostermann , Edoardo Marquis , Sabine Schwarz , Michael Stöger-Pollach , Oleksiy Gogotsi , Markus Valtiner , Manel Rodríguez Ripoll , Carsten Gachot , Pierluigi Bilotto

The development of sustainable solid lubricants is critical for reducing energy losses and material wear in advanced mechanical systems. Two-dimensional materials such as MXenes are attractive for solid lubrication due to their weak interlayer bonding, enabling low-friction sliding. However, conventional MXene synthesis relies on hazardous chemicals like hydrofluoric acid, raising environmental and safety concerns that limit scalability.

Here, we report the first use of bubble-assisted electrochemically synthesized MXenes (EC-MXene) as environmentally friendly solid lubricants. EC-MXene exhibit oxygen-rich surface terminations and significantly reduced fluorine content compared to traditional MXenes. When coated on AISI 52100 steel and tested against Si₃N₄, Al₂O₃, and steel counterbodies, EC-MXene deliver excellent tribological performance, particularly against Si₃N₄, achieving a low and stable coefficient of friction (COF

<

0.25).

Surface analyses using SEM-EDS, Raman spectroscopy, TEM (SAED and EELS), and low-energy ion scattering (LEIS) reveal a robust tribofilm and dynamic replenishment mechanism that sustains lubrication by redistributing MXene flakes from pile-up zones to the sliding interface. Density Functional Theory (DFT) calculations confirm strong interfacial adhesion of EC-MXene to ceramic surfaces, supporting the observed tribological behavior. Load-dependent studies further highlight the role of adhesion and tribofilm ordering in maintaining performance.

These findings position EC-MXene as a sustainable alternative to classical MXenes, combining comparable tribological properties with safer synthesis routes. Their characteristics establish EC-MXene as a benchmark for sustainable two-dimensional solid lubricants with broad potential in advanced mechanical and biotribological applications.

可持续固体润滑剂的开发对于减少先进机械系统的能量损失和材料磨损至关重要。二维材料，如MXenes，由于其层间键合较弱，可以实现低摩擦滑动，因此对固体润滑很有吸引力。然而，传统的MXene合成依赖于氢氟酸等危险化学品，这引起了环境和安全问题，限制了可扩展性。在这里，我们报道了首次使用气泡辅助电化学合成的MXenes （EC-MXene）作为环保固体润滑剂。与传统的mxene相比，EC-MXene表现出富氧的表面末端和显著降低的氟含量。当将EC-MXene涂覆在AISI 52100钢上，并对Si3N4、Al2O3和钢基体进行测试时，EC-MXene具有优异的摩擦学性能，特别是对Si3N4，实现了低而稳定的摩擦系数（COF < 0.25）。利用SEM-EDS、拉曼光谱、TEM （SAED和EELS）和低能离子散射（LEIS）进行的表面分析揭示了一个强大的摩擦膜和动态补充机制，通过将MXene薄片从堆积区重新分配到滑动界面来维持润滑。密度泛函理论（DFT）计算证实了EC-MXene与陶瓷表面的强界面附着力，支持观察到的摩擦学行为。负载相关的研究进一步强调了粘附和摩擦膜有序在维持性能中的作用。这些发现将EC-MXene定位为经典mxene的可持续替代品，结合了类似的摩擦学性能和更安全的合成路线。它们的特性使EC-MXene成为可持续发展的二维固体润滑剂的基准，在先进的机械和生物摩擦学应用中具有广阔的潜力。

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引用次数: 0

Atomic-scale insights into orientational ordering and electronic coupling in C60/MoS2 heterostructures C60/MoS2异质结构中取向有序和电子耦合的原子尺度研究

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-02 DOI: 10.1016/j.carbon.2025.121116

Yifan Qin , Jilian Xu , Zhilong Cao , Yang Bao , Zhewen Liang , Jiaxu Yan , Pengtao Jing , Da Zhan , Lei Liu , Dezhen Shen , Hai Xu

C₆₀-based hybrid heterostructures with 2D materials such as MoS₂ offer promising optoelectronic properties, but their performance is strongly influenced by molecular orientation at the interface. While theoretical studies suggest a preferred hexagonal alignment of C₆₀ on MoS₂ and favorable charge transfer, experimental evidence remains limited. Here, we use atomic resolved Scanning Tunneling Microscopy/Spectroscopy (STM/STS) technique to investigate C₆₀ on monolayer MoS₂. Our results reveal a periodic superstructure with heptamer formations and distinct orbital delocalization within central molecules. These findings highlight the critical role of interfacial ordering in tuning electronic coupling, providing insight for the design of high-performance organic–inorganic devices.

基于c60的杂化异质结构与二维材料（如MoS2）具有良好的光电性能，但其性能受到界面上分子取向的强烈影响。虽然理论研究表明C60在二硫化钼上的首选六边形排列和有利的电荷转移，但实验证据仍然有限。在这里，我们使用原子分辨扫描隧道显微镜/光谱（STM/STS）技术研究了单层二硫化钼上的C60。我们的结果揭示了具有七聚体形成和中心分子内明显的轨道离域的周期性上层结构。这些发现强调了界面有序在调谐电子耦合中的关键作用，为高性能有机-无机器件的设计提供了见解。

引用次数: 0

Enhanced tribological performance of environmentally friendly lubricants with CS/ZnO composite nanoparticles additives CS/ZnO复合纳米颗粒添加剂增强环保型润滑油的摩擦学性能

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-02 DOI: 10.1016/j.carbon.2025.121124

Ying Xia , Peng Cheng , Jie Fei , Wenshan Wang , Jifeng Yan , Zimu Hu , Lehua Qi

In mechanical systems, friction and wear are ubiquitous phenomena that not only cause energy loss but also serve as key factors in mechanical failures. However, commonly used lubricant additives generally suffer from issues such as insufficient stability and susceptibility to oxidation. This study developed a co-precipitation method to grow zinc oxide nanoparticles on the surface of carbon spheres in situ, thereby preparing carbon sphere/zinc oxide (CS/ZnO) composite materials. The prepared CS/ZnO composite nanoparticles were used as a novel lubricant additive, significantly improving the anti-friction and anti-wear properties of the reference oil. When 0.5 wt% CS/ZnO was added, the lubricant demonstrated a significant reduction in the friction coefficient and wear rate by 38.4 % and 45.5 %, respectively, compared to the Ref-oil under a load of 100 N. The excellent friction performance is attributed to the friction film formed on the friction surface through mechanical deposition and friction chemical reactions during the friction process, as well as the filling, repair, rolling bearing, and polishing effects of CS/ZnO.

在机械系统中，摩擦和磨损是普遍存在的现象，不仅造成能量损失，而且是机械故障的关键因素。然而，常用的润滑油添加剂普遍存在稳定性不足和易氧化等问题。本研究采用共沉淀法在碳球表面原位生长氧化锌纳米颗粒，从而制备碳球/氧化锌（CS/ZnO）复合材料。将制备的CS/ZnO复合纳米颗粒用作新型润滑油添加剂，显著提高了基准油的抗摩擦和抗磨性能。当CS/ZnO的添加量为0.5 wt%时，在100 n的载荷下，摩擦系数和磨损率分别比Ref-oil降低38.4%和45.5%。优异的摩擦性能归功于摩擦过程中通过机械沉积和摩擦化学反应在摩擦表面形成的摩擦膜，以及CS/ZnO的填充、修复、滚动轴承和抛光作用。

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引用次数: 0

Experimental study on the friction removal mechanism between single crystal diamond and quartz glass 单晶金刚石与石英玻璃摩擦去除机理的实验研究

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-12-01 DOI: 10.1016/j.carbon.2025.121112

Mingpu Xue , Hui Huang , Min Wu , Nian Duan , Xipeng Xu

Single-crystal diamond (SCD), owing to its outstanding physical and electrical properties, holds great promise for applications in thermal management and semiconductor technologies. Research indicates that significant wear occurs when SCD friction against quartz glass, severely impacting its performance as a device material. However, the underlying wear mechanism remains unclear. In this study, frictional sliding experiments between SCD and quartz glass were conducted to elucidate this phenomenon. The material removal rate (MRR) of SCD was quantitatively evaluated, accompanied by detailed surface and subsurface characterizations. The generated wear debris was analyzed, and triboluminescence at the sliding interface was detected using direct-reading spectroscopy. The results reveal that, under the experimental conditions, SCD undergoes significant wear, with the MRR reaching 214.9 nm/min. After friction, a distinct subsurface amorphous carbon layer with a thickness of approximately 20–30 nm was observed beneath the diamond surface. Graphitization of diamond was detected in the wear debris. These findings demonstrate that diamond wear is predominantly governed by the transformation of sp³ carbon to sp² carbon, followed by removal in the form of graphite. Moreover, discharge phenomena were detected at the frictional interface, which may facilitate the amorphization process. Based on these findings, a new material removal model for SCD is proposed. This study not only provides new insights into the wear mechanisms of diamond and quartz glass but also may develop a simple and effective new method for diamond processing.

单晶金刚石（SCD）由于其优异的物理和电学性能，在热管理和半导体技术方面具有很大的应用前景。研究表明，当SCD与石英玻璃摩擦时，会产生明显的磨损，严重影响其作为器件材料的性能。然而，潜在的磨损机制仍不清楚。本研究通过SCD与石英玻璃之间的摩擦滑动实验来阐明这一现象。定量评价了SCD的材料去除率（MRR），并进行了详细的表面和亚表面表征。对产生的磨损碎片进行了分析，并利用直读光谱检测了滑动界面处的摩擦发光。结果表明，在实验条件下，SCD磨损明显，MRR达到214.9 nm/min。摩擦后，在金刚石表面下观察到一层明显的亚表面非晶碳层，厚度约为20-30 nm。在磨损碎屑中检测到金刚石的石墨化。这些发现表明，金刚石磨损主要是由sp3碳转变为sp2碳，然后以石墨的形式去除。此外，在摩擦界面处检测到放电现象，这可能促进了非晶化过程。在此基础上，提出了一种新的SCD材料去除模型。该研究不仅为金刚石和石英玻璃的磨损机理提供了新的认识，而且可能为金刚石加工提供一种简单有效的新方法。

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引用次数: 0