Formation of Anti-Wear Tribofilms via α-ZrP Nanoplatelet as Lubricant Additives

Dai, Wei; Kheireddin, Bassem; Gao, Hong; Kan, Yuwei; Clearfield, Abraham; Liang, Hong

doi:10.3390/lubricants4030028

Cited by 38 publications

(13 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is known that phosphate groups may act as lubricants (Yang et al, 2016), reducing the frictional force resisting to the relative sliding movement between neighboring surfaces, which is transduced in a lower COF. Furthermore, under wear action, PO 4 3ions are known to undergo favorable reactions resulting in protective tribofilms (Somers et al, 2013;Dai et al, 2016). This might explain the smoothening effect observed on the surface of the tribofilm.…”

Section: Tribocorrosion Degradation Of Tio 2 Nanotubular Films Under mentioning

confidence: 99%

Improved tribocorrosion performance of bio-functionalized TiO2 nanotubes under two-cycle sliding actions in artificial saliva

Alves

Rossi

Ribeiro

et al. 2018

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

After insertion into bone, dental implants may be subjected to tribocorrosive conditions resulting in the release of metallic ions and solid wear debris, which can induce to peri-implant inflammatory reactions accompanied by bone loss, and ultimately implant loosening. Despite the promising ability of TiO nanotubes (NTs) to improve osseointegration and avoid infection-related failures, the understanding of their degradation under the simultaneous action of wear and corrosion (tribocorrosion) is still very limited. This study aims, for the first time, to study the tribocorrosion behavior of bio-functionalized TiO NTs submitted to two-cycle sliding actions, and compare it with conventional TiO NTs. TiO NTs grown by anodization were doped with bioactive elements, namely calcium (Ca), phosphorous (P), and zinc (Zn), through reverse polarization anodization treatments. Characterization techniques such as scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and scanning transmission electron microscopy (STEM), were used to characterize the films. Tribocorrosion tests were carried out in artificial saliva (AS) by applying two cycles of reciprocating sliding actions. The open circuit potential (OCP) was monitored before, during, and after both cycles of sliding, during which the coefficient of friction (COF) was calculated. The resulting wear scars were analyzed by SEM and EDS, and wear volume measurements were performed by 2D profilometry. Finally, the mechanical features of TiO NTs were accessed by nanoindentation. The results show that bio-functionalized TiO NTs display an enhanced tribocorrosion performance, ascribed to the growth of a nano-thick oxide film at Ti/TiO NTs interface, which significantly increased their adhesion strength to the substrate and consequently their hardness. Furthermore, it was discovered that during tribo-electrochemical solicitations, the formation of a P-rich tribofilm takes place, which grants both electrochemical protection and resistance to mechanical wear. This study provides fundamental and new insights for the development of multifunctional TiO NTs with long-term biomechanical stability and improved clinical outcomes.

show abstract

Section: Tribocorrosion Degradation Of Tio 2 Nanotubular Films Under mentioning

confidence: 99%

Improved tribocorrosion performance of bio-functionalized TiO2 nanotubes under two-cycle sliding actions in artificial saliva

Alves

Rossi

Ribeiro

et al. 2018

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

show abstract

“…It also decreased the COF of ZDDP‐derived tribofilm when compared with base oil and boric acid+base oil. Calcium is added into ZDDP as a detergent; however, in a higher level of concentrations such as ≥ % 2, it reacts with ZDDP and forms Ca‐PO and CCO 3 compounds, which Pawlak and Dai reported that these tribocompounds act as an antiwear agent …”

Section: Discussionmentioning

confidence: 99%

Tribological behavior of the low‐concentration boric acid and ZDDP lubricating oil mixtures

Özkan

Sulukan

2019

Surface & Interface Analysis

View full text Add to dashboard Cite

Zinc dithiophosphate (ZDDP)‐free environmental friendly lubricating oil research studies have gained importance due to the governmental regulations over the last decade. In this study, low concentration boric acid‐base oil and ZDDP‐base oil mixtures were investigated with a ball on flat reciprocating tribometer to evaluate their tribological performances. The tribological performances of 1, 3, and 5% additive and base oil mixtures were evaluated at boundary lubrication condition in three main contexts including wear rates, surface tribochemistry, and friction. Results showed that there was no significant difference between boric acid and ZDDP friction coefficients. However, boric acid showed poor wear resistance when compared with ZDDP and it cannot be an alternative additive alone to ZDDPs.

show abstract

“…walled carbon nanotubes mixed nanofluids. The GnP has a two-dimensional structure with multiple plates and has weak Vander wall forces between these nanolayers (Dai et al, 2016). The sheet-like structures act as a third body solid lubricant, which has high strength and shear capabilities making the rubbing surfaces smoother.…”

Section: Analysis Of Wear Depth Using Mwcnt and Gnp Mixed Nanofluidsmentioning

confidence: 99%

Influence of graphene and multi-walled carbon nanotube additives on tribological behaviour of lubricants

Pramanik¹,

Singh²,

Dixit³

et al. 2018

IJSURFSE

View full text Add to dashboard Cite

In the present study, the tribological performance of water-based emulsion (lubricant) was investigated by blending carbon fillers such as graphene nanoplatelets and multiwall carbon nanotubes using pin-on-disc tribometer. It was noticed that addition of GnP and MWCNT in water-based emulsion (conventional lubricant) increases the thermal conductivity and viscosity as compared to conventional lubricants. The nanolubricants were supplied with minimum quantity lubrication (MQL) technique at a constant flow rate and pressure in the sliding zone. The addition of 0.8 wt.% concentration of GnP showed 58.39% reduction in coefficient of friction and 61.80% reduction in wear depth compared to the conventional lubricant. Similarly, for 0.8 wt.% concentration of MWCNT showed 26.27% reduction in coefficient of friction and 47.35% reduction in wear depth compared to the conventional lubricant. The sliding surface micrographs were also investigated to explain the synergistic effect of nanoparticles.

show abstract

Formation of Anti-Wear Tribofilms via α-ZrP Nanoplatelet as Lubricant Additives

Cited by 38 publications

References 27 publications

Improved tribocorrosion performance of bio-functionalized TiO2 nanotubes under two-cycle sliding actions in artificial saliva

Improved tribocorrosion performance of bio-functionalized TiO2 nanotubes under two-cycle sliding actions in artificial saliva

Tribological behavior of the low‐concentration boric acid and ZDDP lubricating oil mixtures

Influence of graphene and multi-walled carbon nanotube additives on tribological behaviour of lubricants

Contact Info

Product

Resources

About