Tribological characterization of vegetal lubricants: Comparative experimental investigation on Jatropha curcas L. oil, Rapeseed Methyl Ester oil, Hydrotreated Rapeseed oil

Ruggiero, Alessandro; D’Amato, Roberto; Merola, Massimiliano; Valášek, Petr; Müller, Miroslav

doi:10.1016/j.triboint.2017.01.030

Cited by 92 publications

(33 citation statements)

References 54 publications

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“…4c-d. Fresh JO and B20 had lower friction coefficients than EMO at both temperatures, which agrees with the behavior reported by other authors [6][7][8][9][10][11]. It suggests that JO enhanced the EMO´s lubricity properties in a fresh state.…”

Section: Tribological Behaviorsupporting

confidence: 90%

“…Most bio-oils have been demonstrated to exhibit better lubricity properties than mineral oils when used in the boundary lubrication regime. This is attributable to the high proportion of free fatty acids they contain, which act as effective friction modifiers [6][7][8][9][10][11]. However, the confident total use of bio-oils as engine lubricants has not been authenticated since they exhibit poor oxidation stability and generate considerable high wear compared with mineral oils, which may damage engine components with their long-term use [9,10,[12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The plant has a high oil content; it can grow on marginal lands in tropical and sub-tropical climates enabling an extensive oil source supply, and it is not considered as human feedstock [11,21]. It has been demonstrated that JO exhibits better tribological properties than other bio-oils, for example, rapeseed oil [10] and is compatible with different sealing elastomers from fuel and lubrication systems [22,23,24]. It has also been reported that the frictional coefficients are reduced by blending JO with mineral oils for different applications, namely, hydraulic fluids [25], engine oils [14], metal working fluids [26,27], automatic transmission fluids [28], drilling muds [29], etc.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Jatropha lubricant thermo-oxidation on the tribological behaviour of engine cylinder liners as measured by a reciprocating friction test

Farfán-Cabrera

Gallardo-Hernández

Perez‐González

et al. 2019

Wear

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Bio-lubricants have emerged as a potential and viable way to replace, totally or partially, mineral oils due to their effectiveness in the boundary lubrication regime for different applications, including, automotive engine operation. However, the effect of thermo-oxidation caused by the long-term use of the bio-lubricants on their tribological properties has been scarcely analyzed. In this work, the effect of thermo-oxidation of Jatropha oil (JO), an engine mineral oil (EMO) and a blend made up of 80%vol. EMO and 20%vol. JO (B20) on the tribological behavior of a simulated piston ring/engine cylinder liner interface was studied in reciprocating friction tests at 26 and 100°C. The oils were thermally oxidized and characterized in terms of carbonyl compounds, depletion of ZDDP additives, changes in kinematic viscosity and viscosity index. Friction coefficients, wear rates and scar morphologies were assessed. Thermo-oxidation resulted in significant viscosity increases in JO compared to EMO and B20. Also, it generated increased friction coefficients for JO and B20. However, they were lower than those for fresh and aged EMO. EMO increased the wear rate after thermo-oxidation in contrast to JO. Smearing was generated using most oil samples while severe scuffing was only produced by using fresh JO at 100°C.

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Section: Tribological Behaviorsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Jatropha lubricant thermo-oxidation on the tribological behaviour of engine cylinder liners as measured by a reciprocating friction test

Farfán-Cabrera

Gallardo-Hernández

Perez‐González

et al. 2019

Wear

View full text Add to dashboard Cite

show abstract

“…of composite materials is important [20]. Particles from the composite material can release at the unsuitable production method and they can make the tribological properties worse [21].…”

Section: Resultsmentioning

confidence: 99%

Machining of polymeric composites by means of abrasive water-jet technology

Müller

2017

Engineering for Rural Development

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Abstract. The water-jet cutting technology represents an effective cutting tool for diverse materials. It is prospective in the area of composite materials, which represent a combination of a hard and a soft component. An advantage of the water-jet cutting is that the cut (the material) is not heat affected, namely at the polymeric materials. The abrasive water-jet with a dash of pabrasivum (a garnet MESH 80) was used for the research. The research was performed on the device AWJ CT 0806. The aim of the research was to evaluate the cutting area and delamination of the matrix and the reinforcement (a filler). The research based on the SEM analysis proved that the AWJ technology was a prospective method for cutting polymeric composite materials.

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“…The vibrating system deforms the surface layers of the machined part in a plastic way. This modified surface has a positive influence on friction, which is essential for practical application [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of aluminium alloy surface machined by means of abrasive-free ultrasonic finishing

Kuśmierczak

Müller

Лебедев

2017

Engineering for Rural Development

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Abstract. Machining belongs to the basic technological operations in production companies. At present, research in ultrasonic machining has been in a progress, which is used as an effective finishing operation. This paper presents machining of the aluminium alloy by means of abrasive-free ultrasonic machining (A-FUM) with a discharge power 630 W and a frequency 22 ± 2 kHz. The different cutting fluids containing nanoparticles were compared at the abrasive-free ultrasonic finishing. The roughness of the surface was evaluated by a microscope Olympus Lext within the research on the machined surface. The aim of other measurements was to evaluate the influence of the reviewed variants of the experiment on incidental reinforcement of the surface. Further, the machined surface was investigated from a hardness point of view. The hardness was measured by the method HBW2.5/62.5 on the surface. The surface and under-surface reinforcement was evaluated by means of the microhardness HV0.1. The machined surface was tested by means of the scanning electron microscopy (SEM) using a microscope TESCAN MIRA 3 GMX. A spectral analysis of the machined surface (EDX) was performed on the scanning electron microscope with the aim to detect residues of nanoparticles from the processing liquid in the surface.

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Tribological characterization of vegetal lubricants: Comparative experimental investigation on Jatropha curcas L. oil, Rapeseed Methyl Ester oil, Hydrotreated Rapeseed oil

Cited by 92 publications

References 54 publications

Effects of Jatropha lubricant thermo-oxidation on the tribological behaviour of engine cylinder liners as measured by a reciprocating friction test

Effects of Jatropha lubricant thermo-oxidation on the tribological behaviour of engine cylinder liners as measured by a reciprocating friction test

Machining of polymeric composites by means of abrasive water-jet technology

Evaluation of aluminium alloy surface machined by means of abrasive-free ultrasonic finishing

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