The influence of ion-implanted Mo on the tribological behavior of iron lubricated with oil containing antiwear additives

Yang, Dongsheng; Xue, Qunji; Zhang, X.S.; Wang, H.Q.; Lin, W.L.; Ding, Xunliang

doi:10.1016/0043-1648(94)90265-8

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…13a) in SPMF-04 was fitted with three components. One at 133.4 eV attributed to phosphorus linked to oxygen in P=O and P-OH at 133.4 eV [62] and P-O-C [63], [64]. The other components at 132.0 and 135.0 eV are related to phosphorus in P-C [65] and P-O-Na [66], therefore the presence of phosphonic and sodium phosphonate groups in the adsorbent is confirmed.…”

Section: Xps Analysis Resultsmentioning

confidence: 95%

Hybrid functionalized phosphonate silica: insight into chromium removal chemistry from aqueous solutions

et al. 2019

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Abstract. Insight into Cr(III) ions removal chemistry from aqueous solutions was gained by using hybrid phosphonate-functionalized silica adsorbents synthesized through a modified route of sol-gel processing (SPMF). Evaluation of the degree of metal removal was obtained from kinetics and batch experiments. Elemental analysis, FTIR, NMR and XPS techniques were used to study the nature of surface complex formed on adsorbent. Adsorption equilibrium results showed a maximum Cr(III) removal of 78.639 mg g-1Cr(III) at pH 3.6 on adsorbent SPMF04; kinetics measurements indicated that equilibrium was reached in 80 min contact time. The achievement of 2.923 mmol P/g as phosphonate groups was obtained. A Langmuir-type mechanism explained the adsorption equilibrium results whereas kinetic measurements were explained through a pseudo-second order mechanism. FTIR measurements indicated a strong influence of Cr(III) adsorbed on surficial functional groups. 29Si CP MAS NMR results indicated that Cr(III) interacted not only with phosphonate surface groups but also with a large of amount of geminal OH surface groups. XPS studies suggested that Cr(III) was removed through the formation of the surface complex R as monovalent chromium acetate and/or divalent. The adsorbent SPMF04 can be potentially employed in industrial applications. Resumen. Información sobre la química de remoción de Cr(III) de soluciones acuosas fue obtenida usando adsorbentes de sílice hibrida funcionalizada con fosfonato sintetizados a través de una ruta modificada del proceso sol-gel (SPMF). La evaluación del grado de remoción de metal fue obtenida a partir de experimentos de cinética y por lotes. Técnicas de análisis elemental, FTIR, NMR y XPS fueron usadas para estudiar la naturaleza del complejo de superficie formado sobre el adsorbente. Los resultados del equilibrio de adsorción mostraron una remoción máxima de Cr(III) de 78.639 mg g-1 Cr(III) a pH 3.6 sobre el adsorbente SPMF04; las mediciones cinéticas indicaron que el equilibrio fue alcanzado en 80 min de tiempo de contacto. El logro de 2.923 mmol P/g como grupos fosfonato fue obtenido. Un mecanismo tipo Langmuir explicó los resultados del equilibrio de adsorción mientras que las mediciones cinéticas fueron explicadas a través de un mecanismo de pseudo-segundo orden. Los resultados de 29Si CP MAS NMR indicaron que Cr (III) interactuó no solamente con grupos fosfonato de superficie sino también con una gran cantidad de grupos OH de superficie geminales. Los estudios de XPS sugirieron que Cr(III) fue removido a través de la formación del complejo de superficie R como acetato de cromo monovalente y/o divalente. El adsorbente SPMF04 puede ser potencialmente empleado en aplicaciones industriales.

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Section: Xps Analysis Resultsmentioning

confidence: 95%

Hybrid functionalized phosphonate silica: insight into chromium removal chemistry from aqueous solutions

et al. 2019

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“…However, although this mechanism may play a role in ZDDP film formation in this study, its relative significance is not entirely clear from the present results: STEM-EDX analysis only detected relatively It is of interest to compare the findings of this study with other work that looked at the effect of ion implantation of metals on tribofilm formation. Yang et al [15][16][17] studied the effect of implantation of Ni, Mo and Al ions into pure Fe on friction and wear. In the absence of ZDDP they found that less wear occurred on the implanted specimens in base oil than on pure Fe and suggested that ion implantation might increase surface residual compressive stress and microhardness, resulting in less wear.…”

Section: Polymerization and Depolymerizationmentioning

confidence: 99%

“…Very few researchers have studied the effect of ion implantation on tribofilm formation. Yang et al [15][16][17] showed Ni, Mo and Al implantation in pure iron deterred the formation of ZDDP tribofilms. However, ion implantation into pure iron might have caused lattice distortion of iron, which could create residual compressive stresses and hence increase hardness of the near substrate region [18]; this means that both chemical and mechanical properties of the surfaces were potentially changed.…”

Section: Introductionmentioning

confidence: 99%

Influence of Steel Surface Composition on ZDDP Tribofilm Growth Using Ion Implantation

2021

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This paper examines the influence of steel surface composition on antiwear tribofilm formation by ion-implanting typical steel alloying elements, Ni, Mo, Cr, V and W, into AISI 52100 bearing steel surfaces. Such implantation changes the chemical composition of the steel surface but has relatively little effect on its mechanical properties or topography. The behaviour of zinc dialkyldithiophosphate (ZDDP) antiwear additive was studied. The study employs a ball on disc tribometer with ability to monitor tribofilm development and a range of analytical tools including STEM-EDX, XPS and FIB-TEM to analyse the formed tribofilms. It was found that Ni implantation promotes ZDDP tribofilm formation while Mo and Cr implantation deters tribofilm growth. V and W implantation do not significantly change tribofilm formation. Results on the influence of ZDDP concentration on tribofilm formation rate with different implanted metals suggest that one important mechanism by which steel composition influences tribofilm formation may be by controlling the extent of ZDDP adsorption. This study shows the importance of steel surface composition on ZDDP response and also demonstrates a powerful way to study and potentially improve the tribological performance of machine components via a combination of lubricant formulation and surface modification.

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Tribochemical behavior of Ni ion implanted pure iron lubricated with ZDDP as an additive

Yang

Zhou

Xue

1996

Wear

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The influence of ion-implanted Mo on the tribological behavior of iron lubricated with oil containing antiwear additives

Cited by 7 publications

References 15 publications

Hybrid functionalized phosphonate silica: insight into chromium removal chemistry from aqueous solutions

Hybrid functionalized phosphonate silica: insight into chromium removal chemistry from aqueous solutions

Influence of Steel Surface Composition on ZDDP Tribofilm Growth Using Ion Implantation

Tribochemical behavior of Ni ion implanted pure iron lubricated with ZDDP as an additive

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