Journal ArticleDOI
THE IMPORTANCE OF SURFACE PROPERTIES AND PARTICLE SHAPE IN THE COMPACTION OF GRAPHITE AND MoS2
A. J. Groszek,R. E. Witheridge +1 more
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In this paper, it was shown that the sites on the basal-plane surface differ from those on the edge surface with respect to their relative affinities for different organic compounds.Abstract:
Adsorptive studies of the surfaces of graphite and MOS2have shown that these consist of two distinct types of site. The sites on the basal-plane surface differ from those on the edge surface with respect to their relative affinities for different organic compounds. These findings led to the development of grinding techniques to produce graphite and MoS2 powders possessing different ratios of basal-plane:edge-surface area.Grinding graphite and MoS2 in the presence of low-viscosity, volatile hydrocarbons produced very thin flake-like powders, consisting predominantly of basal-plane surface. These fine flakes showed a high affinity for long-chain n-paraffins and were therefore termed oleophilic solids. Grinding under reduced pressure also produced very fine powders, having, however, a more granular structure exhibiting a far lower ratio of basal-plane: edge-surface area. These were termed polar solids to distinguish them from the solids ground in liquid hydrocarbons.The cold-forming properties of the...read more
Citations
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Molybdenum disulphide in lubrication. A review
TL;DR: In this article, the structure and properties of MoS2 are described insofar as they are relevant to lubrication, and its behaviour as a dry lubricant, in suspension, and as a component of grease is reviewed.
Journal ArticleDOI
Catalytic activity of the basal and edge planes of molybdenum disulphide
G.C. Stevens,T. Edmonds +1 more
TL;DR: In this paper, the authors examined the properties of MoS2 and reported findings with two samples, one prepared with a high basal plane area and the other having a high edge plane area.
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Reactivity of molybdenum disulfide surfaces studied by XPS
Journal ArticleDOI
The effect of carbon aspect ratio on the friction and wear of PTFE
TL;DR: In this paper, three carbons of differing aspect ratios were incorporated into a matrix of PTFE to investigate the behavior of the differing particle shapes on the friction and wear characteristics of the composites.
Journal ArticleDOI
Review on surface-characterization applications of X-ray photoelectron spectroscopy (XPS): Recent developments and challenges
TL;DR: X-ray photoelectron spectroscopy (XPS) is a powerful tool to study surface properties (< 10 nm) and is being widely used in almost all branches of science and engineering as mentioned in this paper .
References
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Journal ArticleDOI
Semiconductivity and Diamagnetism of Polycrystalline Graphite and Condensed Ring Systems
TL;DR: The analysis of results obtained from studies of electric resistivity as a function of temperature, and sample preparation, and of other available evidence, leads to a clarification of the electronic processes in the class of substances extending from condensed ring molecular solids to polycrystalline graphite as discussed by the authors.
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The burnishing of molybdenum disulphide on to metal surfaces
R.R.M. Johnston,A.J.W. Moore +1 more
TL;DR: In this article, the authors measured the film density (gcm−2) measured by X-ray fluorescence increased first approximately exponentially and then linearly with the number of strokes.
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Surface Properties and Lubricating Action of Graphite and MoS2
A. J. Groszek,R. E. Witheridge +1 more
TL;DR: In this article, the authors investigated the relationship between the proportions of individual surface sites and the lubricating action of graphite and MoS2 solids and found that the proportion of basal plane surface is an important factor in the anti-wear properties of both graphite solids.
Journal ArticleDOI
Some chemical factors involved in the comminution of graphite
TL;DR: In this article, an artificial graphite has been ground in a vibration mill to determine the distribution of the specific surface of the ground graphites between the so-called basal plane and edge surfaces by measuring absorption of gaseous oxygen, determining the combined oxygen content, and estimating the monolayer coverage by myristic acid and dotriacontane adsorbed from solution.
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Compressive and Tensile Properties of Molybdenum Disulfide Compacts
J. C. Tyler,P. M. Ku +1 more
TL;DR: In this paper, a compact molybdenum disulfide powder was made, without the use of a binder, over a wide range of compacting pressures and length-to-diameter ratios.