Friction and Wear Characteristics of Silicon Nitride-Graphite and Alumina-Graphite Composites©

Gangopadhyay, A.; Jahanmir, Said

doi:10.1080/10402009108982034

Cited by 48 publications

(18 citation statements)

References 16 publications

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“…11.30c, that graphite by itself has an extremely low coefficient of friction under similar conditions, illustrating the lubricious nature of the solid lubricant. The lack of a decrease in the coefficient of friction for the alumina-graphite composite can Friction traces of (a) alumina, (b) alumina-graphite composite, and (c) graphite [64] be explained by the presence of steel wear particles that inhibited the formation of the graphite transfer layer. The steel wear debris physically covered the graphite regions within the composite thus retarding the lubricating properties of the graphite.…”

Section: Self-lubricating Behavior Of Alumina-graphite Compositesmentioning

confidence: 96%

“…The highly lubricious graphite-based transfer films that developed were determined to be the underlying cause for the reduction of friction in the silicon nitride composites. To further study the effects of graphite in ceramics, another study by Gangopadhyay and Jahanmir [64] investigated the friction and wear characteristics of silicon nitride-graphite composites. In this study, silicon nitride was again reinforced with a NiCl 2 -intercalated graphite powder reinforcement material under high contact pressure from a tool steel die to produce a selflubricating composite.…”

Section: Self-lubricating Behavior Of Silicon Nitride-graphite Composmentioning

confidence: 99%

“…Tests of alumina-graphite composites sliding on a 52100 steel ring revealed that the coefficient of friction was marginally reduced by the presence of the graphite reinforcement material as well. To further study the effects of graphite in alumina, another study by Gangopadhyay and Jahanmir [64] investigated the friction and wear characteristics of alumina-graphite matrix composites. In this study, alumina matrices were fabricated with small holes that were then mechanically filled with NiCl 2 intercalated graphite powder under high pressure to produce a self-lubricating composite.…”

Section: Self-lubricating Behavior Of Alumina-graphite Compositesmentioning

confidence: 99%

“…Ceramics are often considered for engineering applications that require the use of advanced structural materials undergoing sliding or rolling behavior at elevated temperatures or in severe environments. Ceramics offer unique physical and mechanical properties such as low density, high hardness, high wear resistance, ability to retain strength and hardness at high temperatures, and corrosion resistance [64]. Investigations into the tribological performance of ceramic materials have shown that they exhibit high coefficients of friction between 0.5 and 0.8 in unlubricated sliding conditions [65][66][67][68][69].…”

Section: Introductionmentioning

confidence: 99%

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Self-Lubricating Behavior of Graphite-Reinforced Composites

Menezes

Reeves

Rohatgi

et al. 2013

Tribology for Scientists and Engineers

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Lubricants are extensively used between contacting surfaces to reduce friction and wear. Typically, liquid lubricants are used to achieve low friction and wear. However, these lubricants are not effective in elevated temperature applications or vacuum environments. For these reasons, solid lubricants are utilized to meet these operational needs, where liquid lubrication is impractical. Solid lubricants are only effective as long as they are present in the tribo-interface. Therefore, it is desirable to provide a constant supply of solid lubricant material to the contacting surface. This is often achieved by incorporating solid lubricants as a second phase in the base material. These composite materials have the ability to achieve low friction and wear at the contact surfaces without any external supply of lubrication during sliding. Metal matrix composites reinforced with lamellar solid lubricant particles such as graphite are being used as self-lubricating materials for various engineering applications. In this chapter, the tribological behavior of metal and ceramic matrix composites reinforced with graphite particles has been reviewed. More specifically, copper-graphite, nickel-graphite, magnesiumgraphite, silver-graphite, aluminum-graphite, silicon nitride-graphite, and alumina-graphite composites are studied. The influence of various environmental and mechanical parameters on the friction coefficient and wear rate is discussed. It was found that the amount of graphite released on the worn surface forms a thin transfer film on the contact surfaces. This transfer film reduces the overall friction coefficient and wear rate. The presence of the graphite-based transfer film increases the seizure resistance and enables the contacting surfaces to run under boundary lubrication without galling. The formation and retention of this transfer film on the sliding surface as well as its composition, area fraction, thickness, and hardness are important factors in controlling the friction and wear behavior of the material. The effectiveness of the transfer film also depends on the nature of the sliding surface, the test condition, environment, and the graphite content in the composite.

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Section: Self-lubricating Behavior Of Alumina-graphite Compositesmentioning

confidence: 96%

Section: Self-lubricating Behavior Of Silicon Nitride-graphite Composmentioning

confidence: 99%

Section: Self-lubricating Behavior Of Alumina-graphite Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Self-Lubricating Behavior of Graphite-Reinforced Composites

Menezes

Reeves

Rohatgi

et al. 2013

Tribology for Scientists and Engineers

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show abstract

“…Self-made cutting tool with solid lubricants Calcium Difluoride (CaF 2 ) [10] x Improves tribology [10,[18][19][20] x Usable in high temperature applications [10] x Study on the solid lubricant before fabricating the cutting tool.…”

Section: Internally Cooledmentioning

confidence: 99%

State of art of cooling method for dry machining

et al. 2016

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Abstract. The usage of cutting fluid in the machining operations will not only poses health risk to the workers but also creates environmental challenges associated with fluid treatment and disposal. The objective of this review paper is to identify present cooling method in dry machining and novel feature than can be included in the cooling system for a better heat removal which tend to increase machining performance. From the review study, it shows that cooling method by internal manner is most widely been researched because researcher believes that it has a promising future in adaptive machining to produce a contamination free products which supports the green manufacturing concept. The suggested novel feature is ecologically desirable and it will become as a necessity for improving the performance of dry machining in the near future.

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Wear of Ceramics

Jahanmir¹

2005

Wear – Materials, Mechanisms and Practice

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Friction and Wear Characteristics of Silicon Nitride-Graphite and Alumina-Graphite Composites©

Cited by 48 publications

References 16 publications

Self-Lubricating Behavior of Graphite-Reinforced Composites

Self-Lubricating Behavior of Graphite-Reinforced Composites

State of art of cooling method for dry machining

Wear of Ceramics

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