Tribological characteristic evaluation of coconut oil dispersed with surfactant modified ceria-zirconia hybrid nanoparticles

Philip, Jibin T.; Koshy, Chacko Preno; Mathew, M. D.; Kuriachen, Basil

doi:10.1080/17515831.2019.1648066

Cited by 16 publications

(7 citation statements)

References 45 publications

(50 reference statements)

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“…Finally, Danish et al [46] performed milling experiments on Inconel 718 with a sunflower oil reinforced with graphene which reduced surface roughness by 49% and tool wear by 20%. Coconut oil, one of the vegetable lubricants with the highest number of studies in the literature has been reinforced with NPs such as CeO2, Cu, CuO, MoS2, SiO2 and MWNTs [10, 23,36,47,[49][50][51] with COF and wear reductions of up to ~93% and ~42%, respectively. Interestingly, different studies where CuO NPs were used as an additive obtained similar optimal NP concentrations (0.34 wt.% and 0.5 wt.%) [10,23].…”

Section: Tribological Performance Of Vegetable Nanolubricantsmentioning

confidence: 99%

Review of Vegetable Nanolubricants for Tribological Applications

Peña-Parás¹,

Rodríguez-Villalobos²,

Maldonado-Cortés³

et al. 2022

IJMMT

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About 40 million tons of lubricants are used every year for various industry purposes and applications, where most of them are petroleum based oils. These oils are difficult and expensive to dispose of, have low biodegradability and are contamination risks. Recent efforts have been focused on reducing the environmental impact of petroleum based lubricants through the use of vegetable oils since they are biodegradable and have good lubricity. A drawback of vegetable oils is their poor thermal stability and oxidation, which causes them to decrease their properties at higher loads. Nanoparticle (NP) additives have been explored for improving the tribological performance of vegetable. This literature review seeks to compare and analise the impact of the different NP types, concentrations and vegetable oil type on the coefficient of friction. The vegetable oils that have shown to provide the best tribological behaviour were coconut oil, sunflower oil, palm sesame oil, canola oil, among others. The NP with the best performance were SiO2 and CuO and the concentration with the highest improvement was between 0.01-3.0 wt.%. The results of this study provide an insight on the areas of opportunity for developing new lubricant formulations with vegetable oils and NP additives for industrial applications.

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Section: Tribological Performance Of Vegetable Nanolubricantsmentioning

confidence: 99%

Review of Vegetable Nanolubricants for Tribological Applications

Peña-Parás¹,

Rodríguez-Villalobos²,

Maldonado-Cortés³

et al. 2022

IJMMT

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“…The sampling rate was fixed at 60 samples/min for all tribo-tests carried out under the present investigation. The SWR is calculated as shown in Equation ( 1) [20].…”

Section: Tribo-testingmentioning

confidence: 99%

Tribo-behavioural transition of Ti6Al4V as a function of sliding velocity and load under dry sliding conditions

Philip

Kuriachen

Kumar

et al. 2022

Tribology - Materials, Surfaces & Interfaces

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In this work, the dry sliding wear characteristics of Ti6Al4V (Ti64) -EN31 (steel) tribo-pair at incremental sliding velocity (SV, 0.838-1.466 ms -1 ) and load (L, 50-100 N) conditions are elucidated. As evident, specific wear rate (SWR) and coefficient of friction (CoF) increases and decreases, respectively with load and SV. The wear response of Ti64 undergoes a transition from composite type (oxidative and metallic) to delamination. The evolved oxides, viz. TiO and Ti 8 O 15 were majorly in the form of free particulates. At low SV (0.838-1.047 ms -1 ) and low load (50-70 N), the movable particulates can activate a separation effect limiting the damage due to wear. During severe sliding (SV = 1.257-1.466 ms -1 and L = 70-100 N), the combined influence of frictional heating instigated thermal softening, and the formation/retainment of hard-coarse particulates at the interaction zone causes perforation into the substratum, assisting in spalling.

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“…The effect of ZrO 2 nanoparticles on the rheological and tribological properties of lubricating oils have been reported by various studies [21][22][23][24][25][26][27]. Philip et al [28] investigated the tribological and thermophysical properties of coconut oil mixed with hybrid nanoparticles (Ce-Zr). It is observed that hybrid nanoparticles improve the tribological properties of oil by rolling and protective film mechanism.…”

Section: Viscosity Index 252mentioning

confidence: 99%

Effect of Temperature, Concentration and Aggregation on the Rheological Behavior of ZrO2 – Avocado Oil Nanolubricant

Shafi¹,

Charoo²

2020

Tribol. Ind.

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The paper investigates the effect of dispersed ZrO2 nanoparticles on the rheological behavior of avocado oil. ZrO2 nanoparticles are added in three weight percentages and their effect on viscosity is measured on Anton par's MCR 102 in accordance with DIN EN ISO 3219 international standard. The shear rates and temperatures are varied from 500 -4000 s -1 and 40-100 O C respectively. The effect of low temperatures (20 O C to -20 O C) on the viscosity of oil is also evaluated designating the pour point and cloud point of the avocado oil. The addition of nanoparticles increases the viscosity of avocado oil and preserves the Newtonian behavior of oil at all particle fractions and temperatures. The Newtonian behavior of avocado oil and the nanolubricants are quantified by the Ostwald-e-Waale power law equation. The measured values of viscosity are correlated with the existing theoretical viscosity models and a disagreement between the two is observed.

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Tribological characteristic evaluation of coconut oil dispersed with surfactant modified ceria-zirconia hybrid nanoparticles

Cited by 16 publications

References 45 publications

Review of Vegetable Nanolubricants for Tribological Applications

Review of Vegetable Nanolubricants for Tribological Applications

Tribo-behavioural transition of Ti6Al4V as a function of sliding velocity and load under dry sliding conditions

Effect of Temperature, Concentration and Aggregation on the Rheological Behavior of ZrO2 – Avocado Oil Nanolubricant

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