Surface and interfacial properties of Fe-C-O-Cr alloys in contact with alumina

Novák, Vlastimil; Řeháčková, Lenka; Váňová, Petra; Smetana, Bedřich; Konečná, Kateřina; Drozdová, Ľubomíra; Rosypalová, Silvie

doi:10.2298/jmmb190621005n

Cited by 4 publications

(3 citation statements)

References 25 publications

(33 reference statements)

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“…XPS can identify the element composition by measuring the binding energies between elements and determine the chemical shift of the element and judge the atomic valence. 30 , 31 Therefore, XPS has been diffusely adopted to detect tribo-chemical reactions in the friction process and further analyze the chemical composition of wear scar surfaces. The corresponding test results of Fe 2p, N 1s, O 1s, and P 2p are illustrated in Figure 8 .…”

Section: Results and Discussionmentioning

confidence: 99%

Exploring the Effect Mechanism of Alkyl Chain Lengths on the Tribological Performance of Ionic Liquids

Huang,

Sun,

et al. 2024

ACS Omega

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In this work, four kinds of imidazole phosphate ionic liquids (ILs) with different anionic and cationic alkyl chain lengths were synthesized. The physicochemical properties and tribological performance of ILs were evaluated. The experimental results revealed that the tribological properties of ILs were positively correlated with the cationic chain length and negatively correlated with the anionic chain length. The effect mechanism can be summarized in two aspects: on the one hand, anions with shorter alkyl chain lengths possess stronger adsorption performance and better film forming ability on the friction pair surfaces, which makes the ILs form more robust and stable lubricating film; on the other hand, ILs with longer cationic alkyl chain lengths possess milder tribo-chemical reactions, which can effectively enhance the tribological performance and decrease the corrosion wear.

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Section: Results and Discussionmentioning

confidence: 99%

Exploring the Effect Mechanism of Alkyl Chain Lengths on the Tribological Performance of Ionic Liquids

Huang,

Sun,

et al. 2024

ACS Omega

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“…In the case of FeCONi steels, the coefficient was slightly negative or even constant. This can be attributed to the different sulfur contents of the steel series reported by [16,41,42], with a sulfur content around 55 ppm being considered critical to determining whether the trend in temperature dependence is positive or negative. In addition to Figure 1, the oxygen content influenced the surface tension.…”

Section: Determination Of Surface Characteristicsmentioning

confidence: 99%

The Effect of Trace Oxygen Addition on the Interface Behavior of Low-Alloy Steel

et al. 2022

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This work aims to assess the effect of an oxygen content graded in minimal quantities, on the order of hundreds of ppms, on the determination of surface tension of low-alloy FeCOCr and FeCONi steels in contact with a corundum substrate. Oxygen, as a surface-active element, was segregated at the surface where it interacted with the major components of the alloys, leading to a reduction in surface tension. The sessile drop method was used for wetting tests in the temperature range from steel liquidus temperatures to 1600 °C under nonoxidizing conditions. The effect of oxygen on surface tension and wetting angles was verified by statistical analysis using the Kruskal–Wallis test, which supported the results stating that the values of these quantities decreased with increasing oxygen content. Furthermore, liquidus temperatures, which are of practical importance, were determined by the optical and DTA methods and then compared with theoretically calculated temperature values. It turned out that the increased chromium content causes difficulties in determining surface tension up to 1550 °C due to the formation of a thin Cr2O3 layer. In addition, SEM and XRD analyses accompanied by calculations in the FactSage oxide database were performed to better understand the wetting mechanism.

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“…The surface tension data of iron-based alloys found in literature (Table 3) are reported for alloys that differ not only regarding the content of carbon and silicon, but also other elements such as phosphorus, manganese, sulphur and oxygen, the latter known to be surface active components in Fe-based alloys [4,5,7,25,[30][31][32][33][34][35][36][38][39][40]. However, even for simple binary and ternary Fe-C-Si alloys, the literature data are ambiguous (Fig.…”

Section: Fig 4 Surface Tension Dependence On Temperature For Compacted Graphite Irons: (A) Cgi-0 (B) Cgi-3 (C) Cgi-4mentioning

confidence: 99%

Density and surface tension of molten cast irons

Fima

Sobczak

2021

J min metall B Metall

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Computer-aided development of liquid-assisted metallurgical processes requires reliable basic data for the molten materials, including thermophysical properties such as density, surface tension and viscosity. Cast irons belong to the group of Fe-C alloys of practical importance due to their good technological and utility properties, yet experimental thermophysical data of cast irons in the literature are scarce. In this study, the density and surface tension of three compacted graphite cast iron alloys were measured by the sessile drop method in contact heating mode in the temperature range of 1473 - 1723 K with polycrystalline alumina as a substrate. The drop profile images were recorded both during heating and subsequent cooling regimes. At 1473 K, the density values of the studied compacted graphite irons are between 6.66 and 6.69 g?cm-3, whereas surface tension values are between 1130 and 1510 mN?m-1. The density decreases with increasing temperature, while surface tension dependence on temperature is less obvious. The obtained results are compared to the available literature data and analyzed taking into account chemical interaction of liquid cast irons with the substrate material.

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Surface and interfacial properties of Fe-C-O-Cr alloys in contact with alumina

Cited by 4 publications

References 25 publications

Exploring the Effect Mechanism of Alkyl Chain Lengths on the Tribological Performance of Ionic Liquids

Exploring the Effect Mechanism of Alkyl Chain Lengths on the Tribological Performance of Ionic Liquids

The Effect of Trace Oxygen Addition on the Interface Behavior of Low-Alloy Steel

Density and surface tension of molten cast irons

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