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Dual surface-modification by oleic acid and epoxy-based silane coupling agent providing cerium oxide nanoparticles as additive in pentaerythritol oleate with improved high-temperature adsorption performance and tribological properties 通过油酸和环氧基硅烷偶联剂进行双重表面改性，提供纳米氧化铈颗粒作为季戊四醇油酸酯添加剂，改善高温吸附性能和摩擦学特性
IF 6.2 1区 工程技术
Tribology International Pub Date : 2024-08-22 DOI: 10.1016/j.triboint.2024.110146
Ting Li, Huanhuan Zhang, Yujuan Zhang, Jiajia Jia, Kun Han, Shengmao Zhang, Shuguang Fan, Chunli Zhang, Guangbin Yang
{"title":"Dual surface-modification by oleic acid and epoxy-based silane coupling agent providing cerium oxide nanoparticles as additive in pentaerythritol oleate with improved high-temperature adsorption performance and tribological properties","authors":"Ting Li, Huanhuan Zhang, Yujuan Zhang, Jiajia Jia, Kun Han, Shengmao Zhang, Shuguang Fan, Chunli Zhang, Guangbin Yang","doi":"10.1016/j.triboint.2024.110146","DOIUrl":"https://doi.org/10.1016/j.triboint.2024.110146","url":null,"abstract":"An epoxy-based silane coupling agent (KH560) was grafted onto the surface of oleic acid-modified cerium oxide (CeO-OA) nanoparticles in order to improve the competitive adsorption ability of the anti-wear additives in ester oils and simultaneously hinder the additive desorption owing to thermal disturbance under high-temperature condition. The as-prepared oleic acid-epoxy silane co-modified cerium oxide (CeO-OA/E) nanoparticles were characterized. The effect of temperature on the adsorption behavior of trityl phosphate (TCP, a commercial high-temperature antifriction agent), CeO-OA and CeO-OA/E in PETO was studied using a dissipative quartz microbalance. Their tribological properties as the additives in pentaerythritol oleate (PETO), a polar ester base oil, were evaluated with a four-ball machine and a ball-on-block friction and wear tester; and their tribomechanism was explored with respect to their adsorption behavior on rubbed steel surfaces at elevated temperatures. It was found that the secondary surface-capping of CeO-OA by the KH560 silane coupling agent resulted in great increases in the surface potential (from 54 mV to 396 mV) and thermal stability as well (the thermal decomposition temperature rose from 185 °C to 254 °C). Among the tesetd lubricant additives, CeO-OA/E exhibited the highest adsorption mass, because of the highest surface potential the chemisorption ascribed to the epoxy group of the silane coupling agent. Particularly, CeO-OA/E added in PETO exhibited better friction reduction and anti-wear properties at 150 °C than CeO-OA and TCP, because CeO-OA/E added in PETO formed tribofilm composed of CeO and SiO with excellent thermal stability as well as friction-reduction and antiwear effects through stable chemical adsorption and tribochemical reaction at elevated temperatures.","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
High-temperature tribological properties of NiCr-Cr3C2 cermet coatings in fluoride molten salts 氟化物熔盐中 NiCr-Cr3C2 金属陶瓷涂层的高温摩擦学特性
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-21 DOI: 10.1016/j.triboint.2024.110150
{"title":"High-temperature tribological properties of NiCr-Cr3C2 cermet coatings in fluoride molten salts","authors":"","doi":"10.1016/j.triboint.2024.110150","DOIUrl":"10.1016/j.triboint.2024.110150","url":null,"abstract":"<div><p>In this work, the NiCr-Cr<sub>3</sub>C<sub>2</sub> coatings with different Cr<sub>3</sub>C<sub>2</sub> contents were prepared via high-speed laser cladding. The relationships between the composition, microstructure, and high-temperature tribological properties in fluoride molten salts were systematically studied. The results suggest that with the increase of Cr<sub>3</sub>C<sub>2</sub> content, the friction coefficient tends to decrease and stabilize, while the wear rate initially decreases and then increases. Especially for the coating with 60 wt% Cr<sub>3</sub>C<sub>2</sub>, it exhibits a favorable tribological performance mainly due to the enhanced hardness imparted by Cr<sub>3</sub>C<sub>2</sub>, with an average friction coefficient of 0.12 and a wear rate of 2.78 × 10<sup>−6</sup> mm<sup>3</sup>/Nm. However, the coating experiences delamination damage at 70 wt% Cr<sub>3</sub>C<sub>2</sub> content, leading to an increase in wear rate.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142050159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
A model of contact deep groove seals based on partition model and JFO boundary condition 基于分区模型和 JFO 边界条件的接触式深槽密封件模型
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-21 DOI: 10.1016/j.triboint.2024.110132
{"title":"A model of contact deep groove seals based on partition model and JFO boundary condition","authors":"","doi":"10.1016/j.triboint.2024.110132","DOIUrl":"10.1016/j.triboint.2024.110132","url":null,"abstract":"<div><p>Unlike nuclear main pump seals, deep groove seals in aero-engines operate on a contact basis. However, the precise working mechanism and accurate quantitative methods for assessing their sealing performance remain elusive. This paper introduces a fluid-solid-thermal coupling model for contact deep groove seals, utilizing a partition model and considering JFO boundary condition, mixed lubrication, and detailed heat calculations. The model significantly enhances accuracy compared to original approaches. It comprehensively accounts for contact effects, thermal deformations, convergence wedges, radial waviness, hydrodynamic pressures, groove drainage, and convection, revealing characteristics of contact deep groove seals such as high stiffness, effective heat dissipation, wear resistance, and prolonged service life. The proposed model and working mechanism provide theoretical guidance for designing diverse deep groove seal structures.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Tribological properties of ductile cast iron with in-situ textures created through abrasive grinding and laser surface ablation 通过研磨和激光表面烧蚀在原位形成纹理的球墨铸铁的摩擦学特性
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-21 DOI: 10.1016/j.triboint.2024.110134
{"title":"Tribological properties of ductile cast iron with in-situ textures created through abrasive grinding and laser surface ablation","authors":"","doi":"10.1016/j.triboint.2024.110134","DOIUrl":"10.1016/j.triboint.2024.110134","url":null,"abstract":"<div><p>This paper discusses the proposed abrasive grinding (AG) and laser surface ablation (LSA) method for creating in-situ textures on ductile cast iron (DCI) surfaces. LSA method removes spherical graphite of DCI’s surface, forming martensite and high residual stress on the matrix, thus increasing hardness. AG method uses Al<sub>2</sub>O<sub>3</sub> abrasives to disrupt spherical graphite and form grinding-layer. Compared to LSA, AG method avoids residual stress and burrs, simplifies the processing technology. Tribological tests show that LSA-treated samples have a lower coefficient of friction (COF) and specific wear rate, especially under dry friction conditions, due to increased surface hardness. AG-treated samples have a more stable COF because the oxide layer reduces adhesive wear, grinding-layer provides solid lubrication and reduces localized contact stress.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Evaluation of grinding performance and removal mechanism of epoxy resin coated single crystal SiC 评估环氧树脂涂层单晶 SiC 的研磨性能和去除机理
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-21 DOI: 10.1016/j.triboint.2024.110147
{"title":"Evaluation of grinding performance and removal mechanism of epoxy resin coated single crystal SiC","authors":"","doi":"10.1016/j.triboint.2024.110147","DOIUrl":"10.1016/j.triboint.2024.110147","url":null,"abstract":"<div><p>The inherent hardness and brittleness of single crystal silicon carbide (SiC) materials pose challenges in processing high-quality surface products from SiC. To overcome these challenges, an epoxy resin coated grinding method for SiC was developed and employed in this study. The objective was to investigate how the width (d) and thickness (h) of the epoxy resin coating affect the quality of the ground surface. The research indicated that as <em>d</em> increased from 0 to 2.5 mm, the average surface roughness (<em>Ra</em>) of SiC decreased from 57 to 32 nm. Similarly, as <em>h</em> increased from 0 to 0.8 mm, the average <em>Ra</em> decreased from 53 to 31 nm.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Current-carrying tribological behavior and wear mechanism of CuW composites with different W content 不同 W 含量 CuW 复合材料的载流摩擦学行为和磨损机理
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-21 DOI: 10.1016/j.triboint.2024.110125
{"title":"Current-carrying tribological behavior and wear mechanism of CuW composites with different W content","authors":"","doi":"10.1016/j.triboint.2024.110125","DOIUrl":"10.1016/j.triboint.2024.110125","url":null,"abstract":"<div><p>CuW composites are widely used in the field of electrical contacts, such as high-voltage switch and microelectronic devices, and the service life of the key components is directly affected by its wear resistance and corrosion resistance. In this paper, the effects of loading current on the tribological behavior of CuW composites with different W content were studied, focusing on the variation of friction coefficient during friction, wear rate and the wear topography of the surface after friction, and the wear mechanism was discussed. The results indicate that the friction coefficient of CuW composites was larger under energized conditions than under dry friction conditions, and that the friction coefficient first increases and then decreases with the increasing current. The main reason for the decrease in friction coefficient is that the heat generated by increasing current creates a layer of molten lubricant on the contact surface. In addition, the wear rate of the CuW composites decreased as the W content increased. When loaded with a current of 15 A, the CuW80 composites exhibited the lowest wear rate of 8 × 10<sup>−3</sup> mg/m, which was attributed to the improved wear resistance due to the ability of the high W content to resist plastic deformation. The wear forms of CuW composites under current loading include adhesion, abrasive wear and arc erosion, and fatigue wear was also associated with long-term high current conditions.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142050145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Tribological properties and wear mechanism of Ag@Ti3C2Tx phosphate coatings from room temperature to 800 °C 从室温到 800 °C 的 Ag@Ti3C2Tx 磷酸盐涂层的摩擦学特性和磨损机理
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-20 DOI: 10.1016/j.triboint.2024.110141
{"title":"Tribological properties and wear mechanism of Ag@Ti3C2Tx phosphate coatings from room temperature to 800 °C","authors":"","doi":"10.1016/j.triboint.2024.110141","DOIUrl":"10.1016/j.triboint.2024.110141","url":null,"abstract":"<div><p>MXene, a novel two-dimensional layered material, finds extensive applications in solid lubrication. However, its practical use is limited by lubrication failures at high temperatures. To increase the service temperature of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> solid lubricants, phosphate lubricating coatings were prepared using Ag@Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> as solid lubricants, which exhibits superior tribological properties. Compared with Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> phosphate coating, the friction coefficient and wear rate of Ag@Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> phosphate coating significantly decrease between 400 °C and 800 °C. Especially at 800 ℃, the friction coefficient of Ag@Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> phosphate coating reaches 0.09, and the wear rate shows extremely low. This study lays the foundation for the application of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> in the field of solid lubricants across a wide temperature range.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Effect of shaft voltage on electric damage of GCr15 bearing material 轴电压对 GCr15 轴承材料电损伤的影响
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-17 DOI: 10.1016/j.triboint.2024.110139
{"title":"Effect of shaft voltage on electric damage of GCr15 bearing material","authors":"","doi":"10.1016/j.triboint.2024.110139","DOIUrl":"10.1016/j.triboint.2024.110139","url":null,"abstract":"<div><p>Electrical erosion pit is a fundamental manifestation of electrical bearing damage. As the shaft voltage increased, the degree of electrical damage became more severe, and the residual compressive stress and hardness of bearing surface decreased. The transition of martensite into ferrite induced by high discharge temperature was found at the edge of the erosion pit using a transmission electron microscopy. This phenomenon has not been observed below the mechanically rolled surface under the same conditions. Electrical penetration harmed the bearing through surface erosion, lubrication deterioration and martensite decomposition. The electrical pit could be observed when current density exceeded 0.95 A/mm<sup>2</sup>. The results can help understand bearing failure in the fields of railways, wind turbines, and new-energy vehicles.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Rolling mechanism profundities on material removal mechanism of surface-textured GaN using Molecular dynamics simulation 利用分子动力学模拟研究表面纹理氮化镓的滚动机理对材料去除机理的影响
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-17 DOI: 10.1016/j.triboint.2024.110137
{"title":"Rolling mechanism profundities on material removal mechanism of surface-textured GaN using Molecular dynamics simulation","authors":"","doi":"10.1016/j.triboint.2024.110137","DOIUrl":"10.1016/j.triboint.2024.110137","url":null,"abstract":"<div><p>Molecular dynamics simulation examines how the polishing tool's rotating velocity and axes affect surface nanotribological properties and material removal mechanism of patterned gallium nitride (GaN) substrates. Frictional coefficient and average contact area affect material removal rate (MRR) variance. Rotating speed increases the frictional coefficient and contact area, elevating MRR. Anticlockwise abrasives have substantially higher root-mean-square roughness (RMS) than clockwise ones. After polishing, increasing the rotating angle increases the frictional coefficient, average contact area, MRR, and RMS. MRR enhancement is maximum at −15 rad/ns, the only spinning velocity that improves MRR. RMS improvement ratio is highest when the polishing tool spins clockwise or the rotational axis orientation is lowered. Particularly, the MRR and RMS improvements after the polishing process can reach 103.8 % and 223.5 %, respectively. These findings help explain atomic-scale GaN-based material removal and deformation with frictional resistance and erosion by polishing.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141998442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Sustainable lubrication through Gd DLC films and ionic liquids for wear and corrosion resistance 通过 Gd DLC 薄膜和离子液体实现可持续润滑，从而提高耐磨性和耐腐蚀性
IF 6.1 1区 工程技术
Tribology International Pub Date : 2024-08-16 DOI: 10.1016/j.triboint.2024.110130
{"title":"Sustainable lubrication through Gd DLC films and ionic liquids for wear and corrosion resistance","authors":"","doi":"10.1016/j.triboint.2024.110130","DOIUrl":"10.1016/j.triboint.2024.110130","url":null,"abstract":"<div><p>This study examines the integration of ionic liquids (ILs) with gadolinium diamond-like carbon (Gd-DLC) films as a means of addressing the environmental drawbacks associated with conventional additives, such as zinc dialkyldithiophosphates. Tribological testing initially revealed that higher concentrations of gadolinium in the DLC resulted in improved wear resistance. Further observation of the wear tracks confirmed no corrosion typically seen in steel under bromide-containing ILs, thereby demonstrating the protective capabilities of Gd-DLC. Advanced surface analysis techniques revealed that increased gadolinium content enhances phosphate adsorption, resulting in the generation of protective tribofilms. These findings indicate that Gd-DLC and ILs have the potential to develop sustainable and efficient lubrication systems, significantly enhancing both performance and environmental compatibility of mechanical applications.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142020868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
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