Hot corrosion of borate melt and interface chemistry of borate-coated steel under tribological stimulation

Tran, Bach H.; Wan, Shanhong; Zhu, Hong Tao; Liu, Rong

doi:10.1016/j.corsci.2018.05.042

Cited by 22 publications

(27 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The authors highlighted the important role of physical chemistry of the borate melt for its tribological response. In another contribution, Tran et al [543] have analyzed the tribochemistry of borate melt/oxidized steel. They found that the oxidation reaction of borate melt on oxidized steel is due to interface reaction of the oxide particles.…”

Section: High Temperature Speciality Lubricantsmentioning

confidence: 99%

A review of recent advances in tribology

et al. 2020

View full text Add to dashboard Cite

The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last decade. This review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 years. Different aspects of tribology that have been reviewed including lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology. This review attempts to highlight recent research and also presents future outlook pertaining to these aspects. It may however be noted that there are limitations of this review. One of the most important of these is that tribology being a highly multidisciplinary field, the research results are widely spread across various disciplines and there can be omissions because of this. Secondly, the topics dealt with in the field of tribology include only some of the salient topics (such as lubrication, wear, surface engineering, biotribology, high temperature tribology, and computational tribology) but there are many more aspects of tribology that have not been covered in this review. Despite these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.

show abstract

Section: High Temperature Speciality Lubricantsmentioning

confidence: 99%

A review of recent advances in tribology

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Sodium borate, Na2B4O7.10H2O, begins melting around 525 °C and can provide good lubricity on siding steel surfaces over 600-800 °C [22,23]. Results from ball-on-disc tribotesting showed different tribofilm structures on different mating surfaces.…”

Section: Sodium Boratementioning

confidence: 99%

“…The lower friction of borax glass could be the consequence of a high temperature of 900 °C, which is out of its optimal working condition and it was in a molten state. [22,23]. Results from ball-on-disc tribotesting showed different tribofilm structures on different mating surfaces.…”

Section: Sodium Boratementioning

confidence: 99%

Tribochemistry and Lubrication of Alkaline Glass Lubricants in Hot Steel Manufacturing

Tran

2020

Lubricants

Self Cite

View full text Add to dashboard Cite

Nowadays, the increasing demand to reduce energy consumption and improve process reliability requires an alternative lubricant with an effective tribological performance and environmentally friendly properties to replace traditional lubricants in hot steel manufacturing. The current work reviews recent comprehensive experimental and theoretical investigations in a new generation of alkaline-based glass lubricants, with phosphate, borate, and silicate being intensively researched. This class of lubricants showed an outstanding friction reduction, anti-wear, and anti-oxidation performance on coupled steel pairs over a wide range of temperatures (from 650 °C to 1000 °C). Each type had different tribochemical reactions within itself and with oxidized steel surfaces, which were largely determined by their chemical nature. In addition, the critical role of each structural component was also determined and corroborated by computational simulation. The theoretical studies at quantum and atomic levels reinforced our experimental findings by providing insights into the reaction mechanism using the static and dynamic simulations of the adsorption of lubricant molecules onto iron oxide surfaces. Additionally, the new reactive molecular dynamics (MD) model developed for alkali phosphate will need to be extended further to consider the realistic operating conditions of these lubricants at the atomic scale.

show abstract

“…Therefore, the reasonable number of dopants for a 4 × 4 G supercell could be 1 or 2 dopant atoms, which corresponds to the doping concentrations of 3.125 and 6.25%, respectively. It is worth mentioning that the compounds of all dopant elements have been widely used as lubricants/additives for high-temperature lubrication. ,, These atoms play the role of binders to keep the lubricant adhered onto the working surfaces. The simulations in this work show that the adhesion of G even at high temperatures improved significantly when these atoms were added.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Details about the size and the number of atoms of the simulation models are presented in Table . These systems were equilibrated for 10 ps using a time step of 1 fs and canonical (NVT) ensemble at four different temperatures from 900 to 1200 K, which are conventional temperatures for experimental hot tribotestes. , It is worth mentioning that the simulation time is equal or longer than that in other works , and sufficiently long to observe structural changes by the thermal onset. The FPMD simulations were performed using Γ-point sampling and a cutoff energy of 400 eV for the plane wave functions.…”

Section: Methodsmentioning

confidence: 99%

A First-Principles Study of Impurity-Enhanced Adhesion and Lubricity of Graphene on Iron Oxide Surface

Tieu

Zhu

et al. 2021

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

Graphene is well-known as one of the best solid lubricants for its superlubricity and high mechanical strength. Weak adhesion leading to low interfacial compatibility is a significant challenge of the use of graphene in harsh conditions. In this work, guided by density functional theory (DFT) calculations, we propose a method to improve graphene compatibility on Fe2O3 by substituting B, P, S, and Si to some carbon sites. The results of binding energy and potential energy surface (PES) show that the selection of suitable elements with a reasonable concentration not only greatly improves graphene adhesion but also provides a better frictional property than that with pure graphene. The doped-graphene chemically binds on the surface through the formation of covalent bonds between the dopant atoms and iron of the surface. Bader charge analyses suggest that the doping of B and P causes a severe charge alteration at the nearest carbon C1, and a strong repulsion at the C1–C1 stacking sites at the sliding interface, leading to a reduction in corrugation energies and thus nanoscale friction. Furthermore, first-principles molecular dynamics (FPMD) simulations at high temperature reveal that thanks to well-adhered behavior, the doped-graphene shows a significant reduction in the structural deformation, especially the out-of-plane component, which is essential to maintain graphene’s ultralow friction regime under harsh conditions. The current results shed light on further improved graphene performance without affecting its superlubricity.

show abstract

Hot corrosion of borate melt and interface chemistry of borate-coated steel under tribological stimulation

Abstract: Hot corrosion of borate melt and interface chemistry of borate-coated steel Hot corrosion of borate melt and interface chemistry of borate-coated steel under tribological stimulation under tribological stimulation

Cited by 22 publications

References 25 publications

A review of recent advances in tribology

A review of recent advances in tribology

Tribochemistry and Lubrication of Alkaline Glass Lubricants in Hot Steel Manufacturing

A First-Principles Study of Impurity-Enhanced Adhesion and Lubricity of Graphene on Iron Oxide Surface

Contact Info

Product

Resources

About