High Temperature Friction and Wear Characteristics of Fe–Cu–C Based Self-Lubricating Material

Anand, Ankush; Sharma, Sanjay

doi:10.1007/s12666-017-1124-8

Cited by 15 publications

(16 citation statements)

References 33 publications

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“…Porosity increases with CaF 2 content, which in turn enhances wear by delamination. 8,9 Thus, delaminated debris increases and due to their abrasion μ increases. [6][7][8][9] C6 shows the lowest μ values, i.e., lower by 16% at 5 m/s and 10% at 10 m/s compared to BM.…”

Section: Friction Behaviourmentioning

confidence: 99%

“…8,9 Thus, delaminated debris increases and due to their abrasion μ increases. [6][7][8][9] C6 shows the lowest μ values, i.e., lower by 16% at 5 m/s and 10% at 10 m/s compared to BM. In C3, the amount of CaF 2 (3 wt.…”

Section: Friction Behaviourmentioning

confidence: 99%

“…Unlike in liquid lubrication, wherein heat is conducted away from sliding interface by lubricant medium, in solid-lubrication, much of the heat generated remains localized. As a result, temperature rise in self-lubricating materials causes (i) thermal softening of metallic matrices, [6][7][8][9] (ii) oxidation of matrix in iron-based materials, [6][7][8][9] (iii) tribochemical reactions i.e., formation of new phases, e.g., CaMoO 4 high temperature lubricant in Fe-Mo-CaF 2 composites slid at 600 °C which reduced friction 10 and iron tungstate (Fe 7 W 6 ) hard phase in Fe-W-CaF 2 composites which reduced wear 11 and (iv) effective/ineffective lubrication. Better thermal conductivity and thermal diffusivity of materials subjected to sliding promotes better heat dissipation and therefore alters the above factors, thereby changing the tribological response of the materials.…”

Section: Introductionmentioning

confidence: 99%

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High temperature tribological response of Fe-2Cu-0.8C-CaF₂ self-lubricating composites at high speeds

Mohan,

Anand,

Raina

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this work, Fe-2Cu-0.8C-CaF2 self-lubricating composites with calcium fluoride solid lubricant (3 □ 12 wt.%) were examined for their friction and wear at 5 and 10 m/s, at 500 °C. Addition of CaF2 decreased density and hardness of composites. During sliding, materials gained weight due to oxidation. Compared to the base matrix (Fe-2Cu-0.8C), composites showed lower weight gain and lower coefficient of friction. Increase in porosity with CaF2 content increased oxidation resulting in higher weight gain and increased friction due to wear debris abrasion. Increase in speed reduced weight gain due to higher material loss. Adhesion was the dominant wear mechanism in base matrix; delamination and wear debris abrasion in composites. Temperature rise at sliding surfaces was theoretically estimated. Increase in speed increased temperature, which reduced friction due to softening and shearing of solid lubricant. Composite with 3 wt.% CaF2 showed least surface damage and 6 wt.% showed lowest coefficient of friction, i.e., lower by 16% and 10% at 5, 10 m/s than base matrix. Tribological response of the composites to a broad range of applied parameters, viz. speed, load and temperature taken from earlier works and present work is briefly summarized. The study suggests the dominant role of CaF2 content and the wear debris in altering the tribological response. Further, the stability of the developed composites at high temperature and high load conditions was also established. The study suggests that the developed composites could serve high-load and high-temperature applications for heavy machinery such as bearings, shafts and gears.

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Section: Friction Behaviourmentioning

confidence: 99%

Section: Friction Behaviourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High temperature tribological response of Fe-2Cu-0.8C-CaF₂ self-lubricating composites at high speeds

Mohan,

Anand,

Raina

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…CaF 2 is soft, poorly soluble in water and thermally stable over a wide temperature, and its thermal expansion closely matches that of many alloys [ 93 , 94 ]. These properties lead to the extensive use of CaF 2 in ferrous-based self-lubricating composites [ 95 ]. Han et al [ 93 ] conducted friction and wear studies on Fe–Mo composites containing different wt.…”

Section: Tribology Of Solid Lubricantsmentioning

confidence: 99%

Self-Lubricating Materials for Extreme Condition Applications

John

Menezes

2021

Materials

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Lubrication for extreme conditions, such as high temperature, cryogenic temperature, vacuum pressure, high load, high speed, and corrosive environments, is a continuing challenge among tribologists and space engineers due to the inadequate friction and wear properties of liquid lubricants. As a result, tremendous research effort has been put forward to study lubrication mechanisms for various machine elements under challenging conditions over the past two decades. Self-lubricating materials have been most widely used for adequate lubrication in extreme conditions in recent years. This review paper presents state-of-the-art of materials for lubrication in extreme condition applications in aerospace, automotive, and power generation areas. More specifically, solid lubricants dispersed in various matrices for lubrication application were analyzed in-depth under challenging conditions. This study also reports the self-lubricating materials and their lubrication mechanisms. Finally, various applications and challenges of self-lubricating materials were explored.

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“…Moreover, abundant high-performance metal (Ni, Co, Fe, etc.) [18][19][20][21], intermetallic (Ni-Al, Ti-Al, Fe-Al, etc.) [22][23][24], and ceramic matrix (Si 3 N 4 , SiC, Al 2 O 3 , etc.)…”

Section: Introductionmentioning

confidence: 99%

Investigation of tribological characteristics of nickel alloy-based solid-lubricating composites at elevated temperatures under vacuum

et al. 2020

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The development of a high-performance solid-lubricating composite with excellent self-lubricity over a broad temperature range in vacuum is significant to solve the frictional problems of spatial mechanisms. In this study, the vacuum tribological behaviors of nickel-matrix/Ag/(Ca, Ba)F 2 /graphite (0-2 wt%) composites were studied from 25 to 800 ˚C. The results show that the synergistic effects of solid lubricants can significantly improve the tribological properties of the composites in vacuum, with the graphite content contributing considerably. For 2 wt% graphite, a low friction coefficient (0.14-0.25) and the lowest wear rate ((0.12-4.78)×10  5 mm 3 •N 1 •m  1 ) were observed in vacuum over the entire testing temperature range. Moreover, the wear mechanisms were clarified via analysis of the chemical composition and morphologies of the sliding surfaces.

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High Temperature Friction and Wear Characteristics of Fe–Cu–C Based Self-Lubricating Material

Cited by 15 publications

References 33 publications

High temperature tribological response of Fe-2Cu-0.8C-CaF₂ self-lubricating composites at high speeds

High temperature tribological response of Fe-2Cu-0.8C-CaF₂ self-lubricating composites at high speeds

Self-Lubricating Materials for Extreme Condition Applications

Investigation of tribological characteristics of nickel alloy-based solid-lubricating composites at elevated temperatures under vacuum

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High Temperature Friction and Wear Characteristics of Fe–Cu–C Based Self-Lubricating Material

Cited by 15 publications

References 33 publications

High temperature tribological response of Fe-2Cu-0.8C-CaF2 self-lubricating composites at high speeds

High temperature tribological response of Fe-2Cu-0.8C-CaF2 self-lubricating composites at high speeds

Self-Lubricating Materials for Extreme Condition Applications

Investigation of tribological characteristics of nickel alloy-based solid-lubricating composites at elevated temperatures under vacuum

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Product

Resources

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High temperature tribological response of Fe-2Cu-0.8C-CaF₂ self-lubricating composites at high speeds

High temperature tribological response of Fe-2Cu-0.8C-CaF₂ self-lubricating composites at high speeds