Synergistic lubricating performance of h-BN/GF nanoparticles as oil additives for steel-steel contact

2021 ◽  
pp. 1-17
Author(s):  
Shuai Li ◽  
Qiang Ma ◽  
Zhe Tong ◽  
Qi Liu ◽  
Guangneng Dong
Keyword(s):  
Hexagonal Boron Nitride ◽  
Lubricant Additive ◽  
Interfacial Interaction ◽  
Wear Depth ◽  
Mass Ratio ◽  
Lubrication Mechanism ◽  
Major Objective ◽  
Graphite Fluoride ◽  
Oil Additives ◽  
Resistance Performance

Abstract The major objective of this work is to investigate the synergistic lubricating performance of hexagonal boron nitride (h-BN) and graphite fluoride (GF) nanoparticles (NPs) as lubricant additive in white oil. The tribological tests were carried out on steel-steel contacts using reciprocating ball-on-disk tribometer. Compared with white oil, addition of 0.1 wt. % h-BN/GF reduced the friction coefficient, wear rate and wear depth by 41.1 %, 89.1 %, and 92.3 %, respectively. Furthermore, when the mass ratio of h-BN and GF is 1:1 and the content of h-BN/GF nanocomposites is 0.1 wt. % the white oil show the best lubrication and wear resistance performance. Finally, the synergistic lubrication mechanism was investigated, the unique microstructure of the h-BN/GF composite and weak interfacial interaction between h-BN and GF contributed to the formation of continuous and adhesive tribo-films at the interface.

scholarly journals Research Progress of Nano Copper Lubricant Additives on Engineering Tribology

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2006
Author(s):  
Junde Guo ◽  
Yingxiang Zhao ◽  
Biao Sun ◽  
Puchao Wang ◽  
Zhijie Wang ◽  
...  
Keyword(s):  
Lubricant Additive ◽  
Friction Reduction ◽  
Research Progress ◽  
Lubricating Oil ◽  
Self Healing ◽  
Boundary Slip ◽  
Copper Particles ◽  
Oil Additives ◽  
Engineering Significance ◽  
Lubricating Oil Additives

Nanoparticles have as characteristics super sliding, extreme pressure, self-healing, etc., which can improve the friction reduction and anti-wear performance of sliding components, when used as lubricating oil additives. Nano-copper particles have a good synergistic effect with other antifriction agents, anti-wear agents, antioxidants and grease additives because of their low shear strength and grain boundary slip effect, showing a better anti-friction and anti-wear effect. However, nanoparticles are prone to conglomerate, and this causes a bottleneck in the application of dispersant for nano-copper in a lubricating oil system. The regulation of nanosized effect and surface properties has great engineering significance in compensating for the precision in manufacturing accuracy. This paper comprehensively reviews the tribological research progress of nano-copper as a lubricant additive, which provides a reference to the application of nano-copper particles as lubricating oil additives on engineering tribology.

scholarly journals Nanodiamond Particles as Secondary Additive for Polyalphaolefin Oil Lubrication of Steel–Aluminium Contact

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1438
Author(s):  
Ankush Raina ◽  
Mir Irfan Ul Haq ◽  
Ankush Anand ◽  
Sanjay Mohan ◽  
Rajiv Kumar ◽  
...  
Keyword(s):  
Coefficient Of Friction ◽  
Hexagonal Boron Nitride ◽  
Normal Load ◽  
Lubricant Additive ◽  
Oil Lubrication ◽  
Volumetric Wear ◽  
Base Oil ◽  
Applied Normal Load ◽  
Lubrication Performance ◽  
The Coefficient Of Friction

Nanodiamond (ND) particles are effective lubricant additives. Attention of research has shifted towards investigating the particles as secondary additives. ND particles provide more benefits as secondary additives than as the sole lubricant additive for steel–steel contacts. In this work, the influence of ND particles as secondary additives on oil lubrication of steel–aluminium tribopair (hard–soft contact) was examined. AISI 52100 steel balls were slid against AA2024 aluminium alloy discs, in the presence of polyalphaolefin (PAO) base oil, in boundary lubrication regime (applied normal load: 10 N to 50 N). Primary additives were copper oxide (CuO) and hexagonal boron nitride (h-BN) nanoparticles. The addition of ND particles to PAO, with CuO and h-BN as primary additives, at the lowest applied normal load of 10 N: (i) decreased the volumetric wear of the aluminium discs by 28% and 63%, respectively, and (ii) decreased the coefficient of friction by 15% and 33%, respectively. At the highest applied normal load of 50 N, it: (i) decreased the volumetric wear of the aluminium discs by 20% and 38%, respectively, and (ii) decreased the coefficient of friction by 5.4% and 8%, respectively. ND particles as secondary additives significantly reduce energy loss and power loss as a consequence of an effective reduction in friction during sliding. Unique characteristics of ND particles—such as their (a) physicochemical and thermal properties, (b) ball bearing and polishing effects and (c) synergistic interaction with primary additives to form stable tribofilms—enhance the lubrication performance of steel–aluminium contact. ND particles in combination with h-BN nanoparticles showed the best performance, due to better synergy between the primary additive and the secondary additive. Results from the investigation indicate that ND particles taken as secondary additives in small amount (0.2 wt%) can improve oil lubrication performance of hard–soft contacts in engineering systems.

scholarly journals Preparation of PP/2D-Nanosheet Composites Using MoS2/MgCl2- and BN/MgCl2-Bisupported Ziegler–Natta Catalysts

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 596
Author(s):  
He-xin Zhang ◽  
Byeong-Gwang Shin ◽  
Dong-Eun Lee ◽  
Keun-Byoung Yoon
Keyword(s):  
Thermal Stability ◽  
In Situ Polymerization ◽  
Hexagonal Boron Nitride ◽  
Interfacial Interaction ◽  
Catalyst Preparation ◽  
Two Dimensional ◽  
2D Nanosheets ◽  
Thermal Stability Of ◽  
Ziegler Natta Catalysts

Polypropylene/molybdenum disulfied (PP/MoS2) and Polypropylene/hexagonal boron nitride (PP/hBN) nanocomposites with varying concentration (0–6 wt %) were fabricated via in situ polymerization using two-dimensional (2D)-nanosheet/MgCl2-supported Ti-based Ziegler–Natta catalysts, which was prepared through a novel coagglomeration method. For catalyst preparation and interfacial interaction, MoS2 and hBN were modified with octadecylamine (ODA) and octyltriethoxysilane (OTES), respectively. Compared with those of pristine PP, thermal stability of composites was 70 °C higher and also tensile strength and Young’s modulus of the composites were up to 35% and 60% higher (even at small filler contents), respectively. The alkyl-modified 2D nanofillers were characterized by strong interfacial interactions between the nanofiller and the polymer matrix. The coagglomeration method employed in this work allows easy introduction and content manipulation of various 2D-nanosheets for the preparation of 2D-nanosheet/MgCl2-supported Ti-based Ziegler–Natta catalysts.

scholarly journals Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Yeau-Ren Jeng ◽  
Yao-Huei Huang ◽  
Ping-Chi Tsai ◽  
Gan-Lin Hwang
Keyword(s):  
Tribological Properties ◽  
Md Simulations ◽  
Mineral Oil ◽  
Lubricant Additive ◽  
Contact Interface ◽  
Lubrication Mechanism ◽  
Transmission Electron ◽  
Effective Reduction ◽  
Carbon Nanocapsules ◽  
Map Analysis

An experimental investigation is performed into the tribological properties of mineral oil lubricants containing carbon nanocapsules (CNCs) additives with various concentrations (wt.%). Friction characteristics and wear behaviors at contact interfaces are examined by the block-on-ring tests, high-resolution transmission electron microscopy (HRTEM), and mapping (MAP) analysis. The results suggest that the addition of CNCs to the mineral oil yields an effective reduction in the friction coefficient at the contact interface. Molecular dynamics (MD) simulations clarify the lubrication mechanism of CNCs at the sliding system, indicating the tribological properties are essentially sensitive to the structural evolutions of CNCs.

scholarly journals High-performance multi-functional graphene/hexagonal boron nitride/poly(ethylene oxide) nanocomposites through enhanced interfacial interaction by coordination

RSC Advances ◽  
2018 ◽  
Vol 8 (64) ◽  
pp. 36761-36768 ◽  
Author(s):  
Chen Lin ◽  
Xiong-Ying Ye ◽  
Xu-Ming Xie
Keyword(s):  
Boron Nitride ◽  
Ethylene Oxide ◽  
Metal Ion ◽  
High Performance ◽  
Hexagonal Boron Nitride ◽  
Interfacial Interaction ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

A versatile method to bridge different nanomaterials by metal-ion coordination and enhance different properties simultaneously.

scholarly journals Tribological performances of hexagonal boron nitride nanosheets via surface modification with silane coupling agent

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Lixia Wang ◽  
Yufeng Bai ◽  
Zhiyan Ma ◽  
Chunhua Ge ◽  
Hongyu Guan ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Hexagonal Boron Nitride ◽  
Liquid Paraffin ◽  
Lubricant Additive ◽  
Lubricating Oil ◽  
Wear Volume ◽  
Silane Coupling ◽  
Lubricating Oil Additive

AbstractHexagonal boron nitride (h-BN) is a promising lubricant additive for decreasing wear and friction. However, the poor dispersion stability and bulky size of h-BN restricted its lubrication application. In this paper, bulk h-BN was exfoliated into h-BN nanosheets (h-BNNSs), and then the self-made h-BNNSs were chemically modified with silane coupling agent via a facile and scalable reaction method. The morphology and structure of surface-functionalized h-BNNSs (m-BNNSs) were certified using a series of characterizations. Results revealed that h-BNNSs could be chemically well capped by surface modifier and the lipophilic groups were covalently attached to h-BNNSs surfaces. The m-BNNSs composite possessed long-term dispersion in liquid paraffin (LP). At the optimal adding content of 0.6 wt%, coefficient of friction and wear volume of m-BNNSs composite were decreased by about 31.9% and 53.8% compared with those of LP, respectively. Therefore, m-BNNSs composite as a lubricating oil additive has high research value and good prospects of lubrication applications.

Evaluation of hexagonal boron nitride nano-sheets as a lubricant additive in water

Wear ◽  
2013 ◽  
Vol 302 (1-2) ◽  
pp. 981-986 ◽  
Author(s):  
Dae-Hyun Cho ◽  
Jin-Seon Kim ◽  
Sang-Hyuk Kwon ◽  
Changgu Lee ◽  
Young-Ze Lee
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Lubricant Additive

Research on Optimizing Parameters for Suppressing Vibration of MSCSS under Earthquake Excitation

2014 ◽  
Vol 1079-1080 ◽  
pp. 131-134
Author(s):  
Ting Cai ◽  
Xun An Zhang ◽  
Li Ding ◽  
Ke Peng Cheng
Keyword(s):  
Strong Earthquake ◽  
Seismic Resistance ◽  
Stiffness Ratio ◽  
Control Parameters ◽  
Mass Ratio ◽  
Earthquake Excitation ◽  
Plastic Analysis ◽  
Optimal Values ◽  
Controlled Structure ◽  
Resistance Performance

The dynamic characteristics and the control performances of Mega-Sub Controlled Structure Systems (MSCSS) is investigated in the paper. The control parameters of the structure system, such as the stiffness ratio (RD); the mass ratio of the mega-structure and sub-structure (RM) are studied and their optimal values are obtained in order to achieve better control performances when it is subjected to strong earthquake excitations. Then, trough the nonlinear elasto-plastic analysis, the effectiveness and the feasibility of the proposed MSCSS is demonstrated in reducing the displacement and acceleration responses. The study illustrates that the MSCSS presents good seismic resistance performance, which imply that structural section can be remarkably reduce and achieve to good economic characteristics.

Sign in / Sign up

Export Citation Format

Share Document