Population of transition states of triboactivated chemical processes

Bulgarevich, S. B.; Boiko, M. V.; Колесников, В. И.; Korets, K. E.

doi:10.3103/s1068366610040070

Cited by 11 publications

(10 citation statements)

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Section: Numerical Modelmentioning

confidence: 99%

“…The formation of the tribofilm is assumed to be due to chemical reactions at the interface and follows the kinetics of tribochemical reactions, which are activated not only by temperature but also by mechanical rubbing [36][37][38]. Active collision theories used by Bulgarevich et al [36,37] to explain tribochemical reactions were adopted in the development of the tribofilm growth model used here. It has been suggested that tribofilm removal can be as important as tribofilm formation [40,41], so the tribofilm formation model is augmented with a phenomenological term to account for concurrent removal of the tribofilms.…”

Section: Numerical Modelmentioning

confidence: 99%

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A Semi-deterministic Wear Model Considering the Effect of Zinc Dialkyl Dithiophosphate Tribofilm

et al. 2015

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Tribochemistry plays a very important role in the behaviour of systems in tribologically loaded contacts under boundary lubrication conditions. Previous works have mainly reported contact mechanics simulations for capturing the boundary lubrication regime, but the real mechanism in which tribofilms reduce wear is still unclear. In this paper, the wear prediction capabilities of a recently published mechanochemical simulation approach (Ghanbarzadeh et al. in Tribol Int, 2014) are tested. The wear model, which involves a time-and spatially dependent coefficient of wear, was tested for two additive concentrations and three temperatures at different times, and the predictions are validated against experimental results. The experiments were conducted using a mini-traction machine in a sliding/rolling condition, and the spacer layer interferometry method was used to measure the tribofilm thickness. Wear measurements have been taken using a white-light interferometry. Good agreement is seen between simulation and experiment in terms of tribofilm thickness and wear depth predictions.

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Section: Numerical Modelmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

A Semi-deterministic Wear Model Considering the Effect of Zinc Dialkyl Dithiophosphate Tribofilm

et al. 2015

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“…However, Bulgarevich et al [19] showed that this leads to very low (unrealistic) activation energies. In a different paper, Bulgarevich et al [20] introduced a stress dependence to the Arrhenius equation by means of a multiplication factor [20].…”

Section: Introductionmentioning

confidence: 99%

A Deterministic Stress-Activated Model for Tribo-Film Growth and Wear Simulation

Akchurin

Bosman

2017

Tribol Lett

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A new model was developed for the simulation of growth and wear of tribo-chemical films by combining a boundary element method-based contact model and a stress-activated Arrhenius tribo-film growth equation. Using this methodology, it is possible to predict the evolution and steady-state thickness of the tribo-film (selflimitation) at various operating conditions. The model was validated using two cases for which experimental data were available in the literature. The first case is a single microscopic contact consisting of a DLC-coated AFM tip and an iron-coated substrate. The second case is a macroscale contact between a bearing steel ball and disk. Subsequently, mild wear (wear after running-in) was modeled by assuming diffusion of the substrate atoms into the tribofilm.

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“…The proposed model is based on the Bulgarevich et al [43,44] studies of tribochemical reactions. They used active collision theory and activated complex theory to describe the tribochemical reactions occurring in boundary lubrication.…”

Section: Tribofilm Model Developmentmentioning

confidence: 99%

“…It is assumed that tribochemical reactions follow reaction theory but these reactions are activated not only by temperature but also by mechanical rubbing [43,44,56]. The current model is developed in a way that considers flash temperature as a parameter responsible for the formation but more importantly is the term which is responsible for the mechanical activation of chemical compounds.…”

Section: Tribofilm Model Developmentmentioning

confidence: 99%