Effect of Graphite and Bronze Fillers on PTFE Tribological Behavior: A Commercial Materials Evaluation

Valente, Caio Augusto Garcia Sampaio; Boutin, Felipe Fernando; Rocha, Lucas Prado Caetano; Vale, João Luiz do; Silva, Carlos Henrique da

doi:10.1080/10402004.2019.1695032

Cited by 21 publications

(12 citation statements)

References 43 publications

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“…On the other hand, bronze was previously selected as the core material from a group of researchers. In a work from Valente et al [ 35 ] graphite and bronze were used as filler materials to evaluate frictional conditions and mass loss. Miguel et al [ 36 ] investigated bronze composites under different test conditions by adding alumina to evaluate surface roughness, wear mechanism and friction.…”

Section: Introductionmentioning

confidence: 99%

Optimization Study on Surface Roughness and Tribological Behavior of Recycled Cast Iron Reinforced Bronze MMCs Produced by Hot Pressing

et al. 2021

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Surface roughness reflects the quality of many operational parameters, namely service life, wear characteristics, working performance and tribological behavior of the produced part. Therefore, tribological performance is critical for the components used as tandem parts, especially for the MMCs (Metal Matrix Composites) which are a unique class of materials having extensive application areas such as aerospace, aeronautics, marine engineering and the defense industry. Current work covers the optimization study of production parameters for surface roughness and tribological indicators of newly produced cast iron reinforced bronze MMCs. In this context, two levels of temperature (400 and 450 °C), three levels of pressure (480, 640 and 820 MPa) and seven levels of reinforcement ratios (60/40, 70/30, 80/20, 90/10, 100/0 of GGG40/CuSn10, pure bronze-as received and pure cast iron-as received) are considered. According to the findings obtained by Taguchi’s signal-to-noise ratios, the reinforcement ratio has a dominant effect on surface roughness parameters (Ra and Rz), the coefficient of friction and the weight loss in different levels. In addition, 100/0 reinforced GGG40/CuSn10 gives minimum surface roughness, pure cast iron provides the best weight loss and pure bronze offers the desired coefficient of friction. The results showed the importance of material ingredients on mechanical properties by comparing a wide range of samples from starting the production phase, which provides a perspective for manufacturers to meet the market supply as per human requirements.

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Section: Introductionmentioning

confidence: 99%

Optimization Study on Surface Roughness and Tribological Behavior of Recycled Cast Iron Reinforced Bronze MMCs Produced by Hot Pressing

et al. 2021

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“…However, it is seen that bronze and carbon reinforcements reduce erosion resistance thus increasing the erosion rate. Carbon reinforcement in Ref., 26,31 bronze reinforcement in Ref., 29 bronze and carbon reinforcement in Ref. 25,27 increased the wear resistance, while carbon and bronze reinforcements in this study decreased the erosion resistance of PTFE.…”

Section: Resultsmentioning

confidence: 51%

“…In addition, the carbon fiber reinforcement provided higher wear resistance and higher tensile strength. Valente et al 29 investigated the pin-on-disc wear behavior of PTFE and its composites. Bronze and graphite reinforcements increased wear resistance and reduced mass loss.…”

Section: Introductionmentioning

confidence: 99%

Investigation of particle erosion of polytetrafluoroethylene and its composites

Özzaim

Korkusuz

Fi̇dan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Modern-day engineering applications favor polymers and polymer composites on the grounds of their high specific properties. They can offer many different advantages compared to metals; such as high strength-to-weight ratio, ease of production, but their erosion resistance is weaker. In polymer composites, material loss occurs because of high-speed and repeated exposure to erosive particles, therefore service performance and life of the parts are adversely affected. Due to this, it is crucial to predict the particle erosion that may occur in engineering applications and to know the erosive wear behavior of the materials well. Polytetrafluoroethylene and its composites are widely used in tribological applications because of their load-carrying capacity, self-lubricating, and low-density properties, but there is inadequate literature on particle erosion behavior. In this study, particle erosion behaviors of polytetrafluoroethylene, its randomly oriented short glass fiber, and carbon particle and bronze particle-reinforced composites were investigated under different test conditions. Two different types of erosive particles (garnet and alumina) were used to present the effect of erodent type on particle erosion behavior. After particle erosion tests, surface topographies were examined by an optical profilometer, and surface morphologies were examined by scanning electron microscopy. It has been found that the type of reinforcement and the type of erodent significantly affects the particle erosion behavior of polytetrafluoroethylene and its composites.

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“…An effective way to improve the PTFE hardness and wear resistance is to input solid fillers. Carbon materials such as graphite, graphene, carbon nanotubes, and carbon fiber are widely used as PTFE fillers [ 10 , 11 , 12 , 13 ]. For the development of tribological materials, carbon fibers are most preferred due to their chemical inertness, high strength, and elastic modulus.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Properties of Polytetrafluoroethylene Modified with Combined Fillers: Carbon Fibers, Zirconium Dioxide, Silicon Dioxide and Boron Nitride

Vasilev¹,

Lazareva²,

Struchkova³

et al. 2023

Polymers

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The introduction of combined fillers can effectively improve the mechanical and tribological properties of polytetrafluoroethylene (PTFE). In this work, three different types of nanosized fillers (zirconium dioxide, silicon dioxide, and boron nitride) were introduced in a carbon fiber-reinforced polymer matrix for the development of polymer composite materials (PCM). Tensile and compressive testing were carried out, and the hardness of created PCM was evaluated. It is shown that the compressive strength of PCM increased by 30–70%, and the hardness, increased by 38–55% compared to the initial PTFE. The tribological properties of the developed PCM were evaluated under dry friction conditions. An analysis of the results of an experimental study of wear confirmed that the inclusion of combined fillers (two- and three-component) in PTFE significantly increased wear resistance compared to the polymer matrix with a slight increase in the coefficient of friction. It has been shown that the introduction of three-component fillers has an antagonistic effect on the wear resistance of PCMs compared to two-component fillers. The thermodynamic properties of the composites were analyzed by differential scanning calorimetry and a thermomechanical analyzer. The surface morphology of polymer composites after wear testing was studied by IR spectroscopy and scanning electron microscopy to investigate and suggest a possible mechanism for increasing the wear resistance of the developed composites.

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Effect of Graphite and Bronze Fillers on PTFE Tribological Behavior: A Commercial Materials Evaluation

Cited by 21 publications

References 43 publications

Optimization Study on Surface Roughness and Tribological Behavior of Recycled Cast Iron Reinforced Bronze MMCs Produced by Hot Pressing

Optimization Study on Surface Roughness and Tribological Behavior of Recycled Cast Iron Reinforced Bronze MMCs Produced by Hot Pressing

Investigation of particle erosion of polytetrafluoroethylene and its composites

Mechanical and Tribological Properties of Polytetrafluoroethylene Modified with Combined Fillers: Carbon Fibers, Zirconium Dioxide, Silicon Dioxide and Boron Nitride

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