TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
An Liu,Song Gao,Shan Du,Hailin Lu,Junde Guo
Plasma electrolytic oxidation (PEO) has demonstrated significant enhancements in the mechanical properties and corrosion resistance of titanium alloys. Despite these advantages, the presence of micropores and microcracks in the coating can still detrimentally impact tribological properties. This paper introduces a novel approach involving the in-situ growth of a surface structure. The resulting interface structure exhibits outstanding tribological properties under a load of 3 N and a speed of 1.5 cm/s. In contrast to prior studies, improvements are made to the electrical parameters and electrolyte formula of Plasma electrolytic oxidation, facilitating the in-situ growth of MoSe 2 . This results in the formation of a lubricating layer and a robust TiO 2 ceramic coating with excellent adhesion. A systematic analysis of friction, wear characteristics, reveals that MoSe 2 in situ grow on the surface of the PEO coating, within micropores, microcracks, and crater structures after hydrothermal treatment. This process significantly enhances the microporous structure of the coating, with the MoSe 2 film forming a dense and uniform interlocking layer with the PEO lower layer. Dry friction test experiments demonstrate a 33.7% reduction in friction coefficient and a 29% decrease in wear rate compared to the PEO sample, indicating the synergistic effect between the MoSe 2 film and the PEO coating.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wenxuan Yang,Wei Huang,Cuicui Li,Chongjie Wang,Chitengfei Zhang,Rong Tu,Song Zhang
Highly <111>-oriented 3C-SiC coatings were fabricated by chemical vapor deposition method at different temperatures. As deposition temperature increased from 1473 K to 1773 K, the surface structure of <111>-oriented 3C-SiC transitioned from hexagonal structure with sixfold symmetry to hill-like structure, and finally to conical porous surface composed of stacked short rods. Owing to alteration of surface structure, the hardness of 3C-SiC coatings presented a trend of initially increasing and subsequently decreasing. The 3C-SiC coating deposited at 1673 K possessed the highest hardness, with a value of 42.08 GPa. The average friction coefficient for 3C-SiC/Si 3 N 4 pair ranged from 0.258 to 0.569. The wear rate and hardness exhibited opposite trends. Compared with 3C-SiC coatings prepared at the other three temperatures, the 3C-SiC coating deposited at 1573 K exhibited the lowest wear rate under loads of 5 N, 10 N, and 15 N. Furthermore, the lowest wear rate, recorded at 15 N, was 4.1 × 10 −6 mm 3 /Nm, attributed to high hardness and uniform grain size. The wear mechanism of <111>-oriented 3C-SiC coatings during dry sliding primarily involved fracture, leading to fatigue and third-body wear.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 14
·4979
·
IF 3.4
Wen Zhong,Jiazhi Dong,Siqiang Chen,Zhe Tong
The synergistic effect of different types of solid particles in liquid lubricants is of great interest. In this work, g-C3N4nanosheets were initially prepared using a calcination method and then as-prepared, and h-BN were used as lubricating additives to the white oil. A comparison between the mixed additives and the single g-C3N4or h-BN additives revealed that the base oil with the addition of g-C3N4and h-BN showed the best lubricating properties. The results show a 12.3% reduction in friction coefficient, resulting in a 68.6% reduction in wear rate compared to the white oil when filled with 0.5 wt% g-C3N4and h-BN (1:1 by weight). Moreover, the addition of g-C3N4and h-BN improves the high-temperature lubrication properties of the white oil. However, the friction coefficient and wear rate increase with increasing oil temperature. The large contact area between g-C3N4and its sliding counterpart and the strong adhesive force between h-BN and its sliding counterpart improve the film formation efficiency, leading to enhanced tribological properties under oil lubrication conditions.
研究领域:
材料科学
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机械工程
·
表面工程
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产品关联
DOI
PubMed
高影响因子
WEAR
·
2023
·
IF 5
Guoqing Wang,Jingfu Song,Gai Zhao,Qingjun Ding,Tianqiang Yin,Hongxing Wang
Tungsten disulfide (WS 2 ) has great potential as solid lubricating coating on the metal surfaces due to its excellent wear resistance. In this study, a combination of experiments and machine learning (ML) was used to explore the friction process and predict the friction coefficient and wear rate of WS 2 coatings. Copper coated with WS 2 was prepared by spraying, and the tribological properties of the coating were studied under different loads, velocities, and environment temperatures using both experiments and simulations. Three ML algorithms were employed to investigate the correlations between multiple input parameters and output results. The results showed that the COF and wear rate increased with increasing load, velocity, and environment temperature, and that plastic deformation and adhesive wear were the dominant wear mechanisms under conditions of heavy load, high speed, and high temperature. The Extra Tree (ET) model effectively predicted the tribological properties of the WS 2 coating, with a COF accuracy of 0.899, while the Gradient Boosting Regression Tree (GBRT) model achieved excellent accuracy in predicting wear rate, with an accuracy of 0.948. Feature importance analysis indicated that load had the greatest effect on both COF and wear rate.
研究领域:
材料科学
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机械工程
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数据科学
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产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 6
·1221
·
IF 3.2
Jing Zhang,Yang Sun,Fengqin Shang,Zihan Yan,Jiayu Yao,Binghuan Chen,Hangyan Shen
The setae structure of geckos’ toes can create a strong adhesion force, allowing geckos to climb almost vertical walls. Inspired by this, carbon nanotubes–graphite (CNTs-Gr) was prepared by microwave technology, where CNTs like the setae structure grew in situ on the surface of Gr flakes. Compared to the Gr, the coefficient of friction (COF) and wear rate of CNTs-Gr decreased by 44% and 46%, reaching 0.10 and 1.18 × 10−5mm3·N−1·m−1, respectively. Even if the load increased from 5 N to 35 N, the CNTs-Gr maintained a low and stable COF of 0.12. The excellent tribological properties were attributed to the unique setae structure of CNTs-Gr. This structure enabled the adhesion force of CNTs-Gr to the worn surface to increase threefold, improving the coverage of the lubricating film and significantly enhancing the lubricating film’s pressure resistance. The gecko setae structure proposed in this article provides researchers with a new idea for designing lubricants with excellent lubrication performance and high load-bearing capacity.
研究领域:
材料科学
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仿生学
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摩擦学
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产品关联
DOI
PubMed
高影响因子
Lubrication Science
·
2024
·Vol. 36
·期 6
·468-477
·
IF 1.8
Han Yu,Min Li,Jianfang Sun,Jingying Su,Fenghua Su
As an emerging two-dimensional material, black phosphorus (BP) has excellent tribological properties, but the poor dispersion of BP in oil inhibits its application in friction to some extent. Surface modification is one of the effective methods to solve the dispersibility of BP, and the use of nano-Fe 3 O 4 dotted on the surface of BP improves the dispersion stability of BP in soybean from 3 days to about 15 days. Compared with pure soybean oil, friction coefficient and wear rate of the addition of 0.12 wt% BP/Fe 3 O 4 are reduced 65% and 78%, respectively. To elucidate the excellent tribological mechanisms of BP/Fe 3 O 4 as additives in soybean oil, the compositional and structural characterisation of the abrasion mark surface was studied accordingly. On the one hand, soybean oil reacts with BP/Fe 3 O 4 to form a composite tribo-film during the scraping process. This tribo-film composed of amorphous carbon, iron oxide and phosphorus oxide nitrides prevents direct contact between the sliding interfaces. On the other hand, BP and Fe 3 O 4 nanoparticles form a mechanical rollerball structure, which can further reduce interfacial friction and wear through synergistic lubrication. The results provide new insights into the design of additives in biomass lubricating oils and propose new application prospects for BP in the field of lubricating additives.
研究领域:
材料科学
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摩擦学
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生物质润滑剂
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhuocheng Xie,Jialin Bai,Xiumin Yao,Xuejian Liu,Hanning Xiao
Mesocarbon microbeads (MCMB) have significant potential for enhancing the dry friction performance of SiC. However, the weak bonding between MCMB and SiC leads to a high wear rate in MCMB-SiC composites. This study addressed this issue by in situ formation of a SiC shell on the MCMB surface using the molten salt templating (MSS) method, followed by preparing MCMB@SiC-SiC composites through hot-pressing sintering. The in-situ SiC shell created a strong chemical bond between the MCMB and SiC, improving the interaction between the phases. Comprehensive investigations into the effects of the MCMB@SiC content on the microstructure, mechanical properties, dry friction, and wear performance revealed that the MCMB@SiC-SiC composites exhibited excellent dry friction performance, with a coefficient of 0.24 and a wear rate of 6.6 × 10 −7 mm 3 N −1 m −1 . Compared with the MCMB-SiC composites without the shell structure, the MCMB@SiC-SiC composites exhibited a 36 % reduction in the dry friction coefficient (μ) and an 81 % reduction in the wear rate (WR). The SiC shell structure effectively prevented MCMB extraction and SiC spalling, making this innovative design a promising solution for enhancing the performance of SiC as a sealing material under severe conditions.
研究领域:
材料科学
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摩擦学
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2019
·
IF 3.517
Xiaojing Ci,Wenjie Zhao,Jun Luo,Yangmin Wu,Tianhao Ge,Lu Shen,Xiulei Gao,Zhiwen Fang
Fluorographene could be used as lubricating additive which is attributed to its high mechanical strength and unique layered structures. However, it is difficult to disperse fluorographene uniformly in base oil due to its low surface energy. Here, we formulated multilayered fluorographene nanosheets (FG i ) by fluorinating graphene and then exfoliated the FG i using chloroform to obtain fluorographene (FG). Tribological results indicated that the coefficient of friction and the wear rate of GTL-8 nanolubricant oil enhanced with 0.3 mg/ml FG were decreased by 35% and 90%. Combining Transmission Electron Microscope images and X-ray photoelectron spectra, it is illustrated that physical transferred film and tribochemical film were generated which were beneficial for the excellent tribological performances of GTL-8 based oil enhanced via FG.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2022
·
IF 4.695
Ying Liu,Xiaobo Liu,Xiaoyu Zhang,Xin Chen,Jingfan Zhang,Lin Jing,Yanxia Wu,Shengwang Yu
In situ synthesis of graphene reinforcements in Ni matrix is a promising strategy to manufacture graphene/Ni composites for advanced lubrication . However, the influence of in situ grown graphene content on the tribological properties and the lubricating mechanisms of the graphene/Ni composites under ambient air are far from clear. According to the dissolution and precipitation of carbon on Ni grain surface, this paper reports a high-quality graphene/Ni self-lubricating composite synthesized by in situ powder metallurgy process. The microstructure and tribological behaviours of the composites with different graphene content are elaborated. It is found that the in situ grown few-layer graphene can induce a significant grain refinement effect and simultaneously achieve excellent anti-friction and wear performances. The lowest friction coefficient and wear rate of 0.254 and 4.385 × 10 −5 mm 3 /(N·m) are obtained by the graphene/Ni composite with 0.6 wt% carbon. In comparison with pure Ni, the friction coefficient and wear rate are reduced by 3.02-fold and 3.44-fold, respectively. The tribological improvements of the presented graphene/Ni composite is related to the high H/E ratio and homogenous dispersion of graphene nanosheets .
研究领域:
材料科学
·
摩擦学
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产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Guoqing Wang,Tianqiang Yin,Tao Yang,Jiang Zhao,Yuyan Zhang,Juan Li,Gai Zhao
MoS 2 coatings are essential solid lubricants for aerospace applications, yet their temperature-dependent performance remains incompletely understood. This work systematically investigates the tribological behavior of MoS₂ coatings on copper substrates from 250 to 400 K through integrated experimental and molecular dynamics (MD) approaches. High-precision ball-on-disk tests reveal the friction coefficient and wear rate increase by 42 % and 135 % respectively with rising temperature. Complementary MD simulations employing Stillinger-Weber and EAM potentials demonstrate that elevated temperatures enhance atomic mobility, increasing interfacial von Mises stresses by 30 % and activating new slip mechanisms. Energy analysis confirms thermal effects dominate high-temperature friction behavior. These findings provide atomic-scale insights into the wear mechanisms of MoS₂ coatings under thermal loads, offering fundamental guidance for designing more durable solid lubricants in variable-temperature environments. The combined experimental-simulation methodology establishes a robust framework for studying temperature-dependent tribological phenomena in 2D materials.
研究领域:
材料科学
·
摩擦学
·
计算模拟
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Mohamed Kamal Ahmed Ali,Qiangliang Yu,Feng Zhou,Bin Li,Chaoyang Zhang
Wear is one of the most important factors limiting mechanical components' lifespan and durability. In this study, a novel, AISI 4140-Ag steel-based, self-lubricating nanocomposite was manufactured by the spark plasma sintering (SPS) technique. The high-level aim of this investigation is to obtain a deeper understanding of how silver (Ag) at the nanoscale can enhance the self-lubricating layer's replenishment, which aids in maintaining a steady supply of solid lubricant under dry conditions. Tribological experiments were conducted under various loads (30–150 N) at 5 Hz frequency and 300 °C temperature using a Rtec Universal Tribometer (ball-on-disc setup). After that, advanced surface characterization techniques were utilized to illustrate predominant wear modes, lubrication mechanisms , and the chemical identity of the self-lubrication layer. Noticeably, the AISI 4140-Ag nanocomposite reduced the friction coefficient and wear rate by 36.16–51.14 % and 93.40–97.36 %, respectively, compared to the AISI 4140 composite. The excellent self-lubricating performance is mainly attributed to the replenishment of a self-lubricating layer on the substrate material and a transfer layer on the counterbody, composed of AgO and Fe 2 O 3 . The results of our study hold considerable promise for the advancement of self-lubricating composites and the enhancement of their durability in mechanical applications.
研究领域:
材料科学
·
机械工程
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Shaowen Dong,YongFeng Yang,XiaoYang Ma,ChunJuan Cui,Wei Wang,JinJin Li
Friction and wear shorten equipment lifespan and cause energy loss, nd superlubrication achieved on steel-to-steel surfaces remains challenging. By adding tannic acid-modified black phosphorus nanosheets (TA-BP) to the tartaric acid/glycolic acid mixture (TCA/EG), macroscopic superlubrication can be achieved on engineering steel surfaces in just 5 s. Compared to TCA/EG, the wear rate of friction pairs decreased by 99% to 1.68×10⁻ 10 mm 3 ·N -1 ·m -1 . Surface analysis revealed that TA-BP rapidly deposits on friction pair surfaces, decomposes TCA into carbon films, and forms a composite friction film with BP that exhibits ultra-low shear strength. This tribofilm further reduces friction coefficient through synergistic interaction with lubricants. The study provides new insights for developing super lubricants suitable for mechanical applications.
研究领域:
材料科学
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摩擦学
·
表面工程
·
纳米材料
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）