A Surface Analytical Study of the Effects of Water and Oxygen on Tribological Behavior of DLC Films

2005 ◽  
Author(s):  
O. L. Eryilmaz ◽  
A. Erdemir ◽  
J. A. Johnson ◽  
N. Mehta ◽  
B. Prorok
Keyword(s):  
Surface Chemistry ◽  
Friction And Wear ◽  
Analytical Study ◽  
Tribological Behavior ◽  
Mechanistic Explanation ◽  
Sliding Contact ◽  
Diamond Like Carbon ◽  
Near Surface ◽  
X Ray ◽  
Contact Surfaces

In this study, we explored the effects of water and oxygen molecules on friction and wear of diamond-like carbon (DLC) films. Specifically, using Raman and x-ray photoelectron spectroscopies we attempted to analyze the near surface chemistry and microstructure of sliding contact surfaces and correlated these findings with changes in friction and wear of DLC films. Tribological tests were run in a ball-on-disk machine under 2 to 5 N loads and in dry and moist nitrogen and oxygen environments. Based on the tribological and surface analytical findings, a mechanistic explanation is provided for the high friction and wear of DLC in dry and humid oxygen environments.

Tribological Behavior of Mesophase Carbon Added with Titanium and Copper

2011 ◽  
Vol 80-81 ◽  
pp. 60-63
Author(s):  
Xue Qing Yue ◽  
Hua Wang ◽  
Shu Ying Wang
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Friction Coefficient ◽  
Ball Mill ◽  
Friction And Wear ◽  
Applied Load ◽  
Tribological Behavior ◽  
Metallic Elements ◽  
X Ray Diffraction ◽  
X Ray

Incorporation of metallic elements, titanium and copper, into carbonaceous mesophase (CM) was performed through mechanical alloying in a ball mill apparatus. The structures of the raw CM as well as the Ti/Cu-added CM were characterized by X-ray diffraction. The tribological behavior of the Ti/Cu-added CM used as lubricating additives was investigated by using a high temperature friction and wear tester. The results show that, compared with the raw CM, the Ti/Cu-added CM exhibits a drop in the crystallinity and a transition to the amorphous. The Ti/Cu-added CM used as lubricating additive displays an obvious high temperature anti-friction and wear resistance effect, and the lager the applied load, the lower the friction coefficient and the wear severity.

ESCA and solid-state NMR studies of allophane

Clay Minerals ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 201-209 ◽  
Author(s):  
N. He ◽  
T. L. Barr ◽  
J. Klinowski
Keyword(s):  
Solid State ◽  
Surface Chemistry ◽  
Photoelectron Spectroscopy ◽  
Solid State Nmr ◽  
Bulk Material ◽  
Binding Energies ◽  
Nmr Studies ◽  
Near Surface ◽  
X Ray ◽  
The Core

AbstractThe surface/near-surface chemistry of allophane has been studied by X-ray photoelectron spectroscopy (ESCA) and the bulk material by 27A1 and 29Si solid-state NMR and other techniques. The surface/near-surface Si/Al ratio of allophane is c.1.0, similar to that for kaolinite, zeolite Na-A and sodalite. The core level binding energies for kaolinite and allophane are almost identical, but quite different from those for zeolite Na-A and sodalite, both framework aluminosilicates. The nature and size of these differences is consistent with the differences between the chemistry of sheet and framework silicates. The small variations in the Si(2p) spectra for kaolinite and allophane are discussed in terms of bonding of the tetrahedral units in the two materials.

The Friction and Wear Behaviors of 3-(N-di-n-butylaminomethyl) Quinazolin-4-Ones in Liquid Paraffin

2011 ◽  
Vol 199-200 ◽  
pp. 655-658
Author(s):  
Ou Yang Ping ◽  
Xian Ming Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Friction And Wear ◽  
Tribological Behavior ◽  
Liquid Paraffin ◽  
The Novel ◽  
Heterocyclic Derivative ◽  
X Ray ◽  
Scanning Electron

A heterocyclic derivative of 3-(N-di-n-butylaminomethyl) quinazolin-4-ones was synthesized and its tribological behavior as an ashless additve without phosphorus and sulphur in liquid paraffin was evaluated using a four-ball tester. On the basis of the experimental results, the novel additive has been found to be quite effective as a potential additive in liquid paraffin. The nature of the film on the rubbed surface was investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS).

scholarly journals Investigation of the Tribological and Tribochemical Interactions of Different Ferrous Layers Applied to Nitride Surfaces

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Thawhid Khan ◽  
Yukio Tamura ◽  
Hiroshi Yamamoto ◽  
Ardian Morina ◽  
Anne Neville
Keyword(s):  
Photoelectron Spectroscopy ◽  
Friction And Wear ◽  
Tribological Behavior ◽  
Industrial Process ◽  
Chemical Compositions ◽  
Wear Performance ◽  
X Ray ◽  
Before And After ◽  
And Performance ◽  
Micro Analysis

Abstract Nitriding is a widely used industrial process aiming to improve the tribological properties and performance of components. Previous studies have shown the effectiveness of the treatment with friction and wear performance, but very few have focused on the influence of different ferrous layers formed by variant nitriding treatments on tribological and tribochemical behavior. The influence of an oxide (Fe3O4) and sulfide (FeS) layer on friction and wear performance alongside tribochemical formation was investigated when using a fully formulated hydraulic lubricant. The tribological behavior of the variant nitride samples was analyzed using a tribometer and surface profiler. Scanning electron microscope, energy-dispersive X-ray (EDX) spectroscopy, electron probe micro analysis (EPMA), and X-ray photoelectron spectroscopy (XPS) were employed to identify the morphologies and chemical compositions of the treated surface before and after testing. No real effect on friction or wear was observed with the presence of an oxide (Fe3O4) layer, even though the formation of FeS2 was observed within the tribofilm. However, the formation of a sulfide (FeS) layer after sulfur nitriding produced the lowest friction and wear in comparison to the alternative nitride variants. This was due to the lubrication properties of the FeS layer. The study effectively demonstrated that the type of the ferrous layer could impact tribological and tribochemical properties of nitride samples.

Effect of silver-organic precursor on friction and wear

2014 ◽  
Vol 66 (3) ◽  
pp. 468-472 ◽  
Author(s):  
Ningning Hu ◽  
Jiguang Han ◽  
Bo Hu
Keyword(s):  
Design Methodology ◽  
Friction And Wear ◽  
Room Temperature ◽  
Tribological Behavior ◽  
X Ray Diffraction ◽  
Organic Precursor ◽  
Content Type ◽  
X Ray ◽  
Mild Wear ◽  
Boundary Films

Purpose – The purpose of this paper is to study the effect of silver (Ag) precursor on friction and wear. Design/methodology/approach – Thermogravimetric analysis of the oil with Ag precursor and X-ray diffraction of the decomposition product of the Ag complex were performed. The tribological behavior was evaluated on a UMT-3M Tribometer (CETR) using pure military-grade oil lubricant and the prepared lubricant at room temperature and at 300°C. Energy-dispersive spectroscopy of the chemical composition on the wear scar was performed. Findings – When there is 1 weight per cent Ag precursor in the lubricant, the coefficient friction reduces by about 8 per cent at room temperature and by about 14 per cent at 300°C, and the wear probability also decreases, from moderate wear to mild wear at 300°C. There were more productions which could form metal Ag boundary films possessing low shearing stress and excellent lubricity at 300°C. Originality/value – Ag precursors used as additives in a military-grade oil lubricant and excellent lubricity found at high temperature.

Third Body Effects on Graphite/XC48 Steel Magnetized Sliding Contact

1999 ◽  
Vol 121 (2) ◽  
pp. 403-407 ◽  
Author(s):  
Mohamed El Mansori ◽  
Marjorie Schmitt ◽  
Daniel Paulmier
Keyword(s):  
Magnetic Field ◽  
Wear Debris ◽  
Friction And Wear ◽  
Surface Reactivity ◽  
Sliding Contact ◽  
Ex Situ ◽  
Third Body ◽  
X Ray ◽  
The Third ◽  
The Magnetic Field

This paper completes previous studies concerning the mechanisms governing friction and wear of a steel/graphite couple under an external applied magnetic field. Friction tests were performed in a controlled chamber with a magnetised steel pin sliding against a graphite disk exposed to oxygen, argon, and vacuum environments. Wear debris and friction tracks generated by reactions with the gases after sliding, with and without magnetic field, were identified ex situ by scanning electron microscopy and energy-dispersive X-ray analysis. It shows that the magnetic field modifies the third body behavior which depends on the gases surrounding the contact; this governs the friction state, the type of graphite wear (fatigue or abrasive wear), and the surface reactivity.

Effect of Counterpart's Surface Micromorphology on Tribological Behavior of Nylon under Dry Sliding Contact

2011 ◽  
Vol 199-200 ◽  
pp. 615-619
Author(s):  
Chuan Hui Huang ◽  
Ming Ding ◽  
Hua Zhu
Keyword(s):  
Surface Roughness ◽  
Friction And Wear ◽  
Tribological Behavior ◽  
Transfer Film ◽  
Sliding Contact ◽  
Dry Sliding ◽  
Primary Mechanism ◽  
Surface Micromorphology ◽  
Friction Temperature ◽  
Steel Disc

This paper investigated the friction and wear behaviors of nylon rubbing against steel discs with helical, parallel and multidirectional textures respectively. The results indicated that friction coefficient, friction temperature and wear rate of couple using helical texture steel disc as counterpart were higher than others. Abrasive wear was the primary mechanism of the three couples. Nylon surface roughness increased after rubbing against helical texture steel disc, but decreased after rubbing against parallel and multidirectional texture steel discs. The roughness of both helical and multidirectional texture steel discs increased slightly after test, while the roughness increase of parallel textual steel disc was significant only at regions perpendicular to the rotating direction due to adhesion of nylon transfer film.

Analytical Electron Microscopy of Ion-Implanted Metals

1985 ◽  
Vol 43 ◽  
pp. 282-285
Author(s):  
D.I. Potter ◽  
M. Ahmed ◽  
K. Ruffing
Keyword(s):  
Electron Microscopy ◽  
Ion Implantation ◽  
Friction And Wear ◽  
Analytical Electron Microscopy ◽  
Chemical Compositions ◽  
Surface Chemical ◽  
Near Surface ◽  
The Past ◽  
Analytical Electron ◽  
Property Changes

Ion implantation, used extensively for the past decade in fabricating semiconductor devices, now provides a unique means for altering the near-surface chemical compositions and microstructures of metals. These alterations often significantly improve physical properties that depend on the surface of the material; for example, catalysis, corrosion, oxidation, hardness, friction and wear. Frequently the mechanisms causing these beneficial alterations and property changes remain obscure and much of the current research in the area of ion implantation metallurgy is aimed at identifying such mechanisms. Investigators thus confront two immediate questions: To what extent is the chemical composition changed by implantation? What is the resulting microstructure? These two questions can be investigated very fruitfully with analytical electron microscopy (AEM), as described below.

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