Sliding Wear Behavior of Cast Iron: Influence of MoS2 and Graphite Addition to the Oil Lubricant

Prasad, B. K.; Rathod, S.; Yadav, Manoj Kumar; Modi, O. P.

doi:10.1007/s11665-010-9689-y

Cited by 19 publications

(15 citation statements)

References 53 publications

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“…This effect may be the result of the thick MoS 2 layer being less likely to enter the frictional interface. If this is the case then it will also have been easier to be remove at higher loads, a phenomenon that is described in [33]. There was a large decrease in the average friction coefficient and wear of the EBO with 0.3 wt.% graphene and 0.2 wt.% MoS 2 lubrication, up to 300N.…”

Section: Influence Of Load and Rotational Speed On Tribological Behaviormentioning

confidence: 94%

Synergistic lubricating behaviors of graphene and MoS2 dispersed in esterified bio-oil for steel/steel contact

Peng

Dearn

et al. 2015

Wear

137

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Graphene and MoS 2 were dispersed in Esterified Bio-Oil (EBO) and evaluated as lubricants for steel/steel contact. The tribological behaviors of steel/steel pairs were investigated under lubrication of graphene/MoS 2 blends with different mass ratios, loads and rotating speeds.The micro-morphologies of the worn surfaces were observed by optical and Scanning Electron Microscopy (SEM). The components of the additives and chemical valences of the elements on the rubbed surfaces were analyzed using Raman and X-ray Photoelectron Spectroscopy (XPS). A synergistic lubricating effect for both graphene and MoS 2 with contents of 0.5 wt.% as additives dispersed in EBO was observed that reduced the friction coefficient and wear of the steel specimens under boundary lubrication regime conditions. This was ascribed to the formation of a thicker adsorbed tribo film containing graphene, MoS 2 and organics from the EBO. Graphene was shown to improve the retention of MoS 2 on the frictional surfaces and prevent oxidation during rubbing.MoS 2 , on the other hand, prevented the graphene from being ground into small and defective platelets. Corresponding author. Tel/

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Section: Influence Of Load and Rotational Speed On Tribological Behaviormentioning

confidence: 94%

Synergistic lubricating behaviors of graphene and MoS2 dispersed in esterified bio-oil for steel/steel contact

Peng

Dearn

et al. 2015

Wear

137

View full text Add to dashboard Cite

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“…The major solid lubricants include MoS 2 , graphite, boric acid, boron nitride, PTFE, diamond, soft metals, and lubricious oxides (Ladavière et al 2003, Donnet and Erdemir 2004, Erdemir 2009, Hu et al 2009). The tribological properties of oil additives, such as MoS 2 (Gansheimer and Holinski 1973;Ilie and Tita 2006;Prasad et al 2011), graphite (Huang et al 2006;Martorana et al 2010;Prasad et al 2011), graphene (Eswaraiah et al 2011;Wei et al 2011), boric acid (Erdemir 2009;Lovell et al 2010;Vadiraj et al 2012), nano-diamond (Wu et al 2007;Lee 2008, 2010;Chu et al 2010), PTFE (Rico et al 2007), and others (Xue et al 1997;Chen et al 1998;Sunqing et al 1999;Liu and Chen 2000;Rapoport et al 2003;Hernandez Battez et al 2006;Wu et al 2007;Gu et al 2008;Hernández Battez et al 2008;Yang et al 2009;Hernández Battez et al 2010;Peng et al 2010), have been reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano Hexagonal Boron Nitride Lubricant Additives on the Friction and Wear Properties of AISI 4140 Steel

Çelik

Göncü

2013

Particulate Science and Technology

136

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The aim of this study was to investigate the effects of nano hexagonal boron nitride(hBN) particles on the friction and wear properties of AISI 4140 steel material when the hBN particles are used as an oil additive. Nano hexagonal boron nitride powders, which were produced using a special process, were dispersed in engine oil (SAE10 W) to enhance lubrication. The amount of nano hexagonal boron nitride in the engine oil was varied from 0 to 10% by volume, and four different lubricant samples were prepared. Wear tests were conducted using ball-on-disc geometry. The worn surfaces of substrates were analyzed using scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS). The experiments showed that the nano hexagonal boron nitride particles that were used as an oil additive affected the friction and wear behavior. A 14.4% improvement in the friction coefficient and a 65% decrease in the wear rate were achieved through the use of the nano hBN as an oil additive.

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“…Studies have shown that parameters like the content, nature, structure, mode of incorporation, etc. greatly influence the performance of solid lubricants (Boehringer, 1992;Bhushan and Gupta, 1991;Metals Handbook, 1992c;Kumar, 1994;Jha et al, 1986;Bhushan, 2001;Prasad, 2007a;Winer, 1967;Prasad, 2005Prasad, , 2007bPrasad, , 2009aPrasad et al, 2010bPrasad et al, , 2011Prasad et al, , 2010a. One of the ways to realize the benefit of solid lubricants is to suspend them in the base lubricant (oil) and direct the lubricant mixture at the sliding surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…The lubricating film formed on the wear surfaces also becomes dry and unstable. A few studies (Prasad, 2007a(Prasad, , 2005(Prasad, , 2007b(Prasad, , 2009aPrasad et al, 2010b;2011, 2010a, 2010cPrasad, 2010;Prasad (in press), 2009b;Prasad and Modi, 2008) have shown the optimum solid lubricant content in the oil to be approximately 5 per cent that leads to the best wear performance, while no information seems to be there on the influence of simultaneously adding more than one type of solid lubricants to the oil towards controlling the wear performance.…”

Section: Introductionmentioning

confidence: 99%

Sliding wear characteristics of grey cast iron as affected by the type and fraction of solid lubricants in oil

Prasad

2014

Industrial Lubrication and Tribology

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Purpose -The purpose of the paper is to assess the influence of the volume fraction solid lubricants like talc lead and graphite in oil separately and in combination towards controlling the sliding wear behaviour of a grey cast iron and understand the factors controlling the response of the material in a given set of experimental conditions. Design/methodology/approach -The composition of the lubricating medium (oil) has been changed by dispersing 5 per cent graphite, talc and lead particles separately and in combination. Sliding wear tests were conducted on grey cast iron samples over a range of applied pressures. Parameters determined were wear rate and frictional heating. The wear behaviour of the samples was further substantiated through the features of wear surfaces, subsurface regions and debris particles. Material removal mechanisms and factors responsible for a specific response of the samples have also been analysed. Findings -The wear rate increased with increasing applied pressure. Addition of graphite and lead to the oil separately or in combination brought about a reduction in the wear rate of the samples; talc and talc ϩ lead produced a reverse trend. Temperature near the specimen surface increased with test duration and applied pressure. The test environment influenced the frictional heating in a manner similar to that of the wear rate. Adhesion and abrasion were observed to be the operating material removal mechanisms. Smearing of the solid lubricating phase and delamination resulting from cracking tendency also controlled the wear response. Research limitations/implications -Oil is a very popular lubricant used in engineering applications involving friction and wear. Solid lubricants are used along with the oil. The nature, characteristics and content of the solid lubricants very much control the performance. Limited information is available pertaining to assessing the influence of the type and fraction of solid lubricants in the oil towards controlling the wear behaviour of cast irons (popularly known tribomaterials). The present study enables to understand the effectiveness of talc, lead and graphite in oil towards governing the wear characteristics of cast iron and analyse wear mechanisms and controlling parameters. Practical implications -Graphite and talc are available in nature in abundance. Graphite is a popularly known solid lubricant, while talc is less explored. Lead is also well-known as a solid lubricant but poses health hazard in practice due to its toxic nature. The present study explores the lubricating capability of talc when mixed with oil separately or in combination with lead and graphite towards controlling the wear response of a grey cast iron. It enables to understand the factors responsible for the specific response of talc. Social implications -Assessment of the lubricating potential of talc as a possible substitute to lead is important in view of the toxic nature of the latter. If successful, the exercise could enable to replace lead with talc. Originality/value -The pres...

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Sliding Wear Behavior of Cast Iron: Influence of MoS2 and Graphite Addition to the Oil Lubricant

Cited by 19 publications

References 53 publications

Synergistic lubricating behaviors of graphene and MoS2 dispersed in esterified bio-oil for steel/steel contact

Synergistic lubricating behaviors of graphene and MoS2 dispersed in esterified bio-oil for steel/steel contact

Effect of Nano Hexagonal Boron Nitride Lubricant Additives on the Friction and Wear Properties of AISI 4140 Steel

Sliding wear characteristics of grey cast iron as affected by the type and fraction of solid lubricants in oil

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