Temperature effects on mechanical properties of zinc dithiophosphate tribofilms

Demmou, Karim; Bec, Sandrine; Loubet, Jean‐Luc; Martin, Jean‐Michel

doi:10.1016/j.triboint.2006.01.025

Cited by 39 publications

(46 citation statements)

References 20 publications

(24 reference statements)

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“…Due to the lower hardness and higher plastic flow, more indentation occurs into the depth of the tribofilm and more tribofilm thickness reduction is observed. Results are in agreement with the previous study of the temperature effects on the mechanical properties of ZDDP [21,55].…”

Section: Effect Of Temperaturesupporting

confidence: 93%

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A new insight into the interfacial mechanisms of the tribofilm formed by zinc dialkyl dithiophosphate

Parsaeian

Ghanbarzadeh

Eijk

et al. 2017

Applied Surface Science

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Understanding the true interfacial mechanisms involved in the growth of tribofilms generated by Zinc Dialkyl Dithiophosphate (ZDDP) is important because it is the most widely used antiwear additive and there is legislative pressure to find efficient environmentally-friendly replacements. The main focus of this study is to investigate the durability of the ZDDP tribofilm and correlate it to the chemical and physical properties of the glassy polyphosphates.A novel experimental method has been developed to study the effect of lubricant temperature and contact load on tribofilm growth and durability. Results show that physical parameters such as temperature and pressure significantly influence the tribofilm durability. XPS analyses were carried out before suspending the test and after changing the oil to assess the difference in chemical structure of the tribofilm before and after stopping the test. The chemical analyses suggest that there are different chemical properties across the thickness of the tribofilm and these determine the durability characteristics.

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Section: Effect Of Temperaturesupporting

confidence: 93%

“…These have demonstrated that the properties of the ZDDP tribofilm layers are dependent on applied load [20,21].…”

Section: Mechanical Properties and Durability Of Zddp Tribofilmmentioning

confidence: 97%

A new insight into the interfacial mechanisms of the tribofilm formed by zinc dialkyl dithiophosphate

Parsaeian

Ghanbarzadeh

Eijk

et al. 2017

Applied Surface Science

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“…The hardness at the surface is lower than the bulk hardness; as the penetration depth increases the hardness increases linearly [48,49].…”

Section: Tribofilm Propertiesmentioning

confidence: 96%

“…The effect of the steel substrate in changing the nano-indentation results of tribofilm has been reported and different models for extracting the tribofilm properties were developed [7,48]. In this work the results reported for the mechanical properties of tribofilm based on those models has been used.…”

Section: Tribofilm Propertiesmentioning

confidence: 99%

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Development of a new mechano-chemical model in boundary lubrication

Ghanbarzadeh

Wilson

Morina

et al. 2016

Tribology International

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Studies on ZDDP Anti-Wear Films Formed Under Different Conditions by XANES Spectroscopy, Atomic Force Microscopy and 31P NMR

Pereira

Kasrai

et al. 2007

Tribol Lett

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Antiwear (AW) films, generated from a mineral base oil containing a zinc dialkyl dithiophosphate (ZDDP) additive, were studied as a function of formation temperature, load and rubbing time. The surface morphology of these films was investigated using atomic force microscopy (AFM), and surface roughness calculated for the observed differing surface morphologies. The morphology of the films is heterogeneous for all the tested conditions, but the surface roughness is dependent on the rubbing condition. X-ray absorption near edge structure (XANES) spectroscopy has been used to characterize the chemistry of these films, and the intensity of the phosphorus K-edge was also used to monitor their thickness. The thickness of these films is in the range of 10-90 nm depending on the running conditions. Phosphorus L-edge spectra show that these films have a similar chemical nature with variable polyphosphate chain-lengths. 31P NMR was used to study the decomposition of ZDDP in the residual oils. The spectra show that the primary and secondary ZDDP react differently under the various conditions. The tribological characteristics of these AW films were probed by measuring the coefficients of friction (l) and the wear scar width (WSW) of the counter faces. l is highly related to the applied load and the results of WSW measurements show that the wear performance is related to all the tested parameters, temperature, load and rubbing time.

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Temperature effects on mechanical properties of zinc dithiophosphate tribofilms

Cited by 39 publications

References 20 publications

A new insight into the interfacial mechanisms of the tribofilm formed by zinc dialkyl dithiophosphate

A new insight into the interfacial mechanisms of the tribofilm formed by zinc dialkyl dithiophosphate

Development of a new mechano-chemical model in boundary lubrication

Studies on ZDDP Anti-Wear Films Formed Under Different Conditions by XANES Spectroscopy, Atomic Force Microscopy and 31P NMR

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