Tribology Letters最新文献_第2页

Role of Phase Transformation, Residual Stress Relaxation, and Tribolayer Formation on Wear Behavior of Additively Manufactured Ti6Al4V Alloy 相变、残余应力松弛和摩擦层形成对增材制造Ti6Al4V合金磨损行为的影响

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-09-28 DOI: 10.1007/s11249-026-02204-2

Bishnu Prasad Mahto, T. Satish Kumar, Vikash Chandra Dinkar, Rajesh K. Rai, Rajiv Kumar, M. K. Mishra

{"title":"Role of Phase Transformation, Residual Stress Relaxation, and Tribolayer Formation on Wear Behavior of Additively Manufactured Ti6Al4V Alloy","authors":"Bishnu Prasad Mahto, T. Satish Kumar, Vikash Chandra Dinkar, Rajesh K. Rai, Rajiv Kumar, M. K. Mishra","doi":"10.1007/s11249-026-02204-2","DOIUrl":"10.1007/s11249-026-02204-2","url":null,"abstract":"<div><p>This study examines the influence of post-processing heat treatment on tribological behavior of additively manufactured Ti6Al4V alloy. The specifically designed treatment promotes partial decomposition of metastable martensitic α′ phase into refined α+β structure and transforms residual stresses from tensile to compressive. Pin-on-disc tests showed that the heat-treated sample (HT950-WQ-650) exhibited lower wear rate than the as-printed sample. XPS analysis identified titanium oxides on worn surfaces of both samples. However, HT950-WQ-650 developed additional Al<sub>2</sub>O<sub>3</sub>-enriched tribolayer attributed to microstructural evolution associated with α′ → α + β transformation. The stabilized tribolayer reduces direct metal-to-metal contact, abrasive grooving, debris generation, and delamination. Subsurface analysis further revealed thicker plastically deformed layer with cracking and fragmented debris in the as-printed sample, whereas HT950-WQ-650 exhibited thinner deformation layer and reduced subsurface damage. The findings indicate that abrasive wear, delamination, and tribolayer instability dominate wear response of the as-printed sample, while stable Al<sub>2</sub>O<sub>3</sub>-enriched tribolayer and reduced subsurface deformation contribute to improved wear resistance of HT950-WQ-650.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Multistage Fractal Analysis of Contact and Porosity Evolution in Mechanical Seal Interfaces Under Varying Pressures 变压力下机械密封界面接触与孔隙演化的多阶段分形分析

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-09-22 DOI: 10.1007/s11249-026-02200-6

Zhengbo Ji, Jianjun Sun, Junqiao Zhang, Xuelong Fu, Linlin Zhao

{"title":"Multistage Fractal Analysis of Contact and Porosity Evolution in Mechanical Seal Interfaces Under Varying Pressures","authors":"Zhengbo Ji, Jianjun Sun, Junqiao Zhang, Xuelong Fu, Linlin Zhao","doi":"10.1007/s11249-026-02200-6","DOIUrl":"10.1007/s11249-026-02200-6","url":null,"abstract":"<div><p>The three-dimensional topography of mechanical seal end faces is characterized using the Weierstrass–Mandelbrot function, and a rough-surface contact fractal model is established with fractal dimension <i>D</i><sub>s</sub>, fractal roughness parameter <i>G</i>, and maximum micro-asperity contour base size <i>l</i> as the modeling parameters. The deformation criteria of micro-asperities are considered for elastic, elastic–plastic, and fully plastic deformation, and the initial porosity of the sealing interface is derived. The effects of contact pressure and fractal parameters on the real contact area, contact proximity, and interface porosity are analyzed. The results show that increasing contact pressure increases the real contact area and contact proximity. When <i>D</i><sub>s</sub> < 2.45, variations in <i>G</i> have a limited effect on these parameters, whereas when <i>D</i><sub>s</sub> > 2.45, increasing <i>G</i> significantly promotes their growth. The initial porosity increases with increasing <i>D</i><sub>s</sub> and is essentially independent of <i>G</i>, whereas loading reduces porosity, with a more pronounced reduction at higher <i>D</i><sub>s</sub> and lower <i>G</i>. The surface morphologies of YG8 rotating rings and M106K stationary rings were measured using an AF-LI profilometer, and their fractal parameters were determined by the structure function method. Leakage experiments under different surface morphologies, medium pressures, and contact pressures were conducted to validate the proposed model. The experimental and theoretical results exhibited consistent variation trends, demonstrating the applicability of the proposed model for predicting leakage characteristics of mechanical seal interfaces.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Halogen-Free Deep Eutectic Solvents for High-Performance Bearing Lubrication via Alkyl Chain Length Regulation 通过烷基链长度调节用于高性能轴承润滑的无卤深共晶溶剂

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-09-20 DOI: 10.1007/s11249-026-02203-3

Jiaqi Xiang, Mengmeng Liu, Can Wu, Haitao Zheng, Huipeng Fu, Lidan Yao

{"title":"Halogen-Free Deep Eutectic Solvents for High-Performance Bearing Lubrication via Alkyl Chain Length Regulation","authors":"Jiaqi Xiang, Mengmeng Liu, Can Wu, Haitao Zheng, Huipeng Fu, Lidan Yao","doi":"10.1007/s11249-026-02203-3","DOIUrl":"10.1007/s11249-026-02203-3","url":null,"abstract":"<div><p>Modern industrial systems demand lubricants that combine high tribological performance with low environmental impact. However, conventional petroleum-based lubricants exhibit poor environmental compatibility, and current green alternatives often lack tunable structure–property relationships and well-understood lubrication mechanisms. Herein, a series of halogen-free deep eutectic solvents (HFDES) were rationally designed using diols with varied alkyl chain lengths as hydrogen bond donors and saturated fatty acids as acceptors, enabling precise modulation of intermolecular interactions. Their molecular structures and thermal transition behaviors were characterized by FT-IR, <sup>1</sup>H NMR spectroscopy, and DSC. Systematic tribological evaluation demonstrates that lubrication performance strongly depends on the alkyl chain lengths of both components, achieving a minimum friction coefficient of 0.025. Mechanistic analysis reveals that the HBD chain length governs adsorption capacity via molecular polarity, whereas the HBA chain length primarily controls load support and bulk viscosity. These synergistically determine adsorption film stability, hydrogen bond network integrity, and tribochemical film formation. Bearing tests under realistic conditions further validate this mechanism, showing a 36.8% reduction in high-frequency vibration RMS compared to PAO10, with consistent torque trends. This work provides fundamental insights and experimental guidance for the rational design of halogen-free, high-performance lubricants.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Residual Gas Composition Governs Tribochemical Evolution of Plasma-Nitrided Ti6Al4V During Vacuum Sliding 残余气体组成控制等离子体氮化Ti6Al4V在真空滑动过程中的摩擦化学演变

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-09-16 DOI: 10.1007/s11249-026-02201-5

Jiahui Si, Nan Li, Ketan Wang, Lin Chen, Zhe Zhao, Lixin Xu, Dongshan Li

{"title":"Residual Gas Composition Governs Tribochemical Evolution of Plasma-Nitrided Ti6Al4V During Vacuum Sliding","authors":"Jiahui Si, Nan Li, Ketan Wang, Lin Chen, Zhe Zhao, Lixin Xu, Dongshan Li","doi":"10.1007/s11249-026-02201-5","DOIUrl":"10.1007/s11249-026-02201-5","url":null,"abstract":"<div><p>Vacuum tribology has traditionally been interpreted in terms of total pressure, whereas the role of residual gas composition in governing tribochemical evolution remains insufficiently understood. In this work, hollow cathode discharge-assisted plasma nitriding (HCDPN) was employed to produce a TiN-rich modified layer (~ 3.2 μm) on Ti6Al4V alloy, and its tribological behavior was systematically investigated in air, under different vacuum levels, and under controlled O<sub>2</sub> and N<sub>2</sub> partial pressures. The nitrided alloy exhibited substantially lower friction and wear in vacuum than in air, with the best tribological performance obtained under high vacuum (0.03 Pa). Increasing O<sub>2</sub> partial pressure progressively increased the friction coefficient and wear rate, whereas N<sub>2</sub> produced a considerably weaker effect. Surface analyses revealed that oxygen accelerated the tribochemical transformation of TiN into TiON and TiO<sub>2</sub>, accompanied by enhanced oxidation of Fe transferred from the counterpart ball, resulting in severe interfacial degradation. In contrast, the low-oxygen environment in high vacuum largely preserved the TiN-rich surface and suppressed oxidative tribochemical reactions. These results demonstrate that O<sub>2</sub> has a substantially stronger influence than N<sub>2</sub> on the tribological behavior of plasma-nitrided Ti6Al4V, primarily through oxygen-driven transformation of the TiN-rich surface and oxidation of transferred Fe. This work provides direct experimental evidence linking oxygen partial pressure to tribochemical surface evolution and frictional degradation during vacuum sliding.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Friction and Wear Performance of Soybean-Based Oils + Protic Ionic Liquid and Graphene Biolubricants 大豆油+质子离子液体和石墨烯生物润滑剂的摩擦磨损性能

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-09-15 DOI: 10.1007/s11249-026-02188-z

María-Dolores Avilés, María-Dolores Bermúdez, Tomás Caparrós, Paloma Mostaza, Francisco J. Carrión-Vilches

{"title":"Friction and Wear Performance of Soybean-Based Oils + Protic Ionic Liquid and Graphene Biolubricants","authors":"María-Dolores Avilés, María-Dolores Bermúdez, Tomás Caparrós, Paloma Mostaza, Francisco J. Carrión-Vilches","doi":"10.1007/s11249-026-02188-z","DOIUrl":"10.1007/s11249-026-02188-z","url":null,"abstract":"<div><p>A novel class of high-performance soybean-based biolubricants has been developed through the incorporation of a protic ionic liquid, graphene nanoplatelets, or both, resulting in improved lubrication and wear reduction performance. These biolubricants were studied in a severe metal-ceramic tribopair under pin-on-disk configuration using low-volume lubrication. The best tribological performance was obtained for epoxidized soybean oil containing 1 wt% ionic liquid, which reduced the friction coefficient by up to 72%. Wear rate decreased by as much as 91% with the addition of 0.1 wt% graphene to the ionic liquid modified oil. All the biolubricants presented Newtonian behavior; the addition of graphene and protic ionic liquid to neat epoxidized oil markedly increased its viscosity, indicating strong interactions and improving load-carrying capacity. Furthermore, the thermo-oxidative resistance of these vegetable biolubricants increased significantly when the epoxidized oils were evaluated, showing that chemical modification strongly influenced degradation pathways under the applied testing conditions. The presence of ionic liquid and epoxidized-oil tribofilms within the wear tracks was confirmed by X-ray photoelectron spectroscopy. This study demonstrates the potential of a synergistic protic ionic liquid–graphene system as an antiwear additive for biolubricant formulations.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11249-026-02188-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Friction Suppression and Autoparametric Resonance 摩擦抑制与自参数共振

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-09-14 DOI: 10.1007/s11249-026-02202-4

S. Yu. Krylov

{"title":"Friction Suppression and Autoparametric Resonance","authors":"S. Yu. Krylov","doi":"10.1007/s11249-026-02202-4","DOIUrl":"10.1007/s11249-026-02202-4","url":null,"abstract":"<div><p>Autoparametric resonance in a combined contact (tip apex)–driving-spring (cantilever) system was proposed earlier to explain experimentally observed multiple peaks in friction force as a function of velocity. As shown in this paper, the nontrivial interplay between periodic slips of the tip and initiated vibrations of the cantilever can lead not only to the enhancement of friction but also—what might be even more important in practice—to its substantial suppression. In systems with comparable stiffness of the contact and the driving spring, the autoparametric reduction of friction takes place in a surprisingly wide range of velocities, and it can reach several tens percent, depending on the system parameters and temperature. In this velocity range, frictional energy dissipation exhibits pronounced variations which reflect changes in the character of the contact slips. The key feature of all the changes is that early slips always—in one way or another—prevail over late ones, thus making the registered friction force small with respect to its expected “non-resonant” value.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Optimizing the Tribological Behavior of Nanocrystalline Inconel 718 by Solid Lubricant Reinforcements 固体润滑剂增强剂优化纳米晶Inconel 718的摩擦学性能。

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-09-04 DOI: 10.1007/s11249-026-02198-x

Manoel Kasalo, U. Pranav Nayak, Timothy MacLucas, Sebastian Suarez, Andrea Bachmaier

{"title":"Optimizing the Tribological Behavior of Nanocrystalline Inconel 718 by Solid Lubricant Reinforcements","authors":"Manoel Kasalo, U. Pranav Nayak, Timothy MacLucas, Sebastian Suarez, Andrea Bachmaier","doi":"10.1007/s11249-026-02198-x","DOIUrl":"10.1007/s11249-026-02198-x","url":null,"abstract":"<div><p>Bulk metal matrix composites of nanocrystalline Inconel 718 (IN718) reinforced with various solid lubricant (SL) particles were fabricated from powder blends using a combination of colloidal mixing and high-pressure torsion (HPT). Conventional (MoS<sub>2</sub>, WS<sub>2</sub>, graphite) and modern SL (graphene nanoplatelets and functionalized carbon nanotubes) were incorporated at varying concentrations. Tribological performance was investigated under ambient conditions with a focus on running-in behavior. Linear reciprocating ball-on-disc tests were conducted against spherical Si<sub>3</sub>N<sub>4</sub> and 100Cr6 counterbodies, with wear characterized by confocal laser microscopy and scanning electron microscopy, including qualitative chemical analysis. The friction evolution of HPT-deformed IN718 exhibited strain-dependent behavior, as evidenced by microhardness measurements. Conventional SL and graphene provided predominantly limited improvements in friction and wear. Only carbon nanotube reinforcements consistently improved tribological performance across all concentrations and counterbody materials. Best results were achieved at a content of 5 wt%, exhibiting stable self-lubricating behavior, thereby reducing the friction coefficient from 0.78 to 0.14 and the specific wear rate by an order of magnitude to ~ 10<sup>–9</sup> mm<sup>3</sup> N<sup>−1</sup> mm<sup>−1</sup>. These findings highlight the potential of carbon nanotube-reinforced IN718 composites for more sustainable tribological applications under ambient conditions.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13545129/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148896331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wear Performance of Dental Composites with Different Polymerization Modes Under Different Simulated Oral Conditions 不同聚合模式牙科复合材料在不同模拟口腔条件下的磨损性能

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-08-31 DOI: 10.1007/s11249-026-02193-2

Kivanc Dulger, Gencaga Purcek

{"title":"Wear Performance of Dental Composites with Different Polymerization Modes Under Different Simulated Oral Conditions","authors":"Kivanc Dulger, Gencaga Purcek","doi":"10.1007/s11249-026-02193-2","DOIUrl":"10.1007/s11249-026-02193-2","url":null,"abstract":"<div><p>This study comparatively investigates the friction and wear behavior of three commercially available resin-based composites with different curing modes—light-cured (3M Filtek One Bulk Fill), self-cured (STELA), and dual-cured (ACTIVA Bioactive)—under simulated oral conditions of artificial saliva, artificial saliva containing PMMA slurry, and citric acid solution. Reciprocating ball-on-flat wear tests were conducted in accordance with ASTM G133 at 37 °C. Quantitative wear assessment was performed via 2D/3D volumetric material loss measurements, complemented by microhardness and detailed worn-surface analyses using optical profilometry and scanning electron microscopy (SEM). The results revealed pronounced environment- and material-dependent tribological responses. ACTIVA dual-cured composite exhibited the lowest and most stable friction coefficients and superior wear resistance in saliva and saliva containing PMMA slurry conditions, whereas STELA self-cured composite showed intermediate performance and the highest wear resistance under acidic exposure. Despite its higher hardness, 3M Filtek demonstrated the greatest volumetric wear across in all environments. SEM observations confirmed distinct wear mechanisms ranging from mild adhesive wear to severe micro-ploughing and filler pull-out, in strong agreement with quantitative wear data. Overall, the findings highlight the decisive role of polymerization pathways and environmental chemistry on wear evolution and provide clinically relevant insights for the selection of restorative composites under mechanically and chemically challenging oral conditions.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148928120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Experimental Optimization of Bionic Hexagonal Prism Plate Inspired by Typical Reptile Epidermal Structures: Effects of Surface Parameters on Friction Reduction 基于典型爬行动物表皮结构的仿生六边形棱镜板的实验优化：表面参数对摩擦减少的影响

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-08-29 DOI: 10.1007/s11249-026-02194-1

Jiwei Wen, Minchuan Gan, Xixian Lv, Siyuan Cheng

引用次数: 0

Synthesis and Tribological Properties of MXene/CoAl-LDH Heterostructure Nano-additives MXene/CoAl-LDH异质结构纳米添加剂的合成及其摩擦学性能

IF 3.5 3区工程技术

Tribology Letters Pub Date : 2026-08-26 DOI: 10.1007/s11249-026-02196-z

Ting Li, Yangjie Kong, Chengjin Zhang, Fuhua Jing, Zhenyu Yin, Lixiu Zhang, Xinran Li

{"title":"Synthesis and Tribological Properties of MXene/CoAl-LDH Heterostructure Nano-additives","authors":"Ting Li, Yangjie Kong, Chengjin Zhang, Fuhua Jing, Zhenyu Yin, Lixiu Zhang, Xinran Li","doi":"10.1007/s11249-026-02196-z","DOIUrl":"10.1007/s11249-026-02196-z","url":null,"abstract":"<div><p>Two-dimensional MXene (Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>) demonstrates significant potential for applications in tribology due to its exceptional interlayer shear behavior and high load-bearing capacity. However, its practical use is considerably limited by issues such as poor dispersibility, susceptibility to agglomeration in non-polar lubricating oils, and inadequate high-temperature oxidation resistance. To overcome these challenges, this study utilized a hydrothermal method to in-situ grow CoAl-LDH on the surface of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>, successfully creating a Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>/CoAl-LDH composite. The steric hindrance effect of the heterostructure effectively addressed the dispersion stability problem of the additive in PAO6 base oil, while simultaneously enhancing the material’s oxidation resistance. Tribological tests indicate that, under conditions of 25 °C and 40 N, the incorporation of 0.2 wt% of this composite results in significant reductions in the average friction coefficient and wear volume of PAO6 base oil by 52.9 and 51.3%, respectively. At 200 °C and 40 N, the corresponding reductions are 39.1 and 39.4%. The remarkable friction-reducing and anti-wear performance can be attributed to the in-situ formation of a dense composite tribo-chemical film at the sliding interface during friction. This protective film, composed of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>, CoAl-LDH, metal oxides, and complex carbides, substantially enhances the load-bearing and lubricating properties of the contact interface.</p></div>","PeriodicalId":806,"journal":{"name":"Tribology Letters","volume":"74 4","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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