Role of crystallinity on wear behavior of PTFE composites

Conte, Marcello; Pinedo, B.; Igartua, A.

doi:10.1016/j.wear.2013.08.019

Cited by 60 publications

(32 citation statements)

References 11 publications

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“…PTFE, which is composed of rigid rodlike molecules with a smooth molecular profile, showed a low coefficient of friction because easily slipped between the aligned molecular chains at the interface . The temperature at the interface between rubbing bodies increases because most of the energy that dissipates during the process of friction is converted into heat . So, the molecular chains of PTFE became more active at high temperatures; this led to an increase in viscoelastic deformation, and more PTFE was peeled off.…”

Section: Resultsmentioning

confidence: 99%

“…40 The temperature at the interface between rubbing bodies increases because most of the energy that dissipates during the process of friction is converted into heat. 41 So, the molecular chains of PTFE became more active at high temperatures; this led to an increase in viscoelastic deformation, and more PTFE was peeled off. Therefore, the friction coefficient of the pure PTFE increased with time.…”

Section: Experiments With Ptfe Composites Filled With Different Compomentioning

confidence: 99%

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Interface enhancement between polytetrafluoroethylene and glass fibers modified with a titanate coupler

Jiang

Zhu

Zhang

et al. 2016

J of Applied Polymer Sci

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The use of glass fibers (GFs), molybdenum disulfide (MoS2), and talc was evaluated to reinforce polytetrafluoroethylene (PTFE) for potential applications in automobile shock absorber pistons. The orthogonal experiment results show that the optimal GF/MoS2/talc/PTFE weight ratio was 2:3:3:92 for the PTFE composite; this ratio resulted in better mechanical properties, hardness, low linear expansion, and wear rate. Chemical coupling and high‐temperature activation treatment on the surface of GF greatly enhanced the interfacial adhesion between the PTFE matrix and GF, as revealed by atomic force microscopy analysis. This resulted in reductions in the wear rate and linear expansion coefficient by two orders of magnitude compared with that of PTFE. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44668.

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Section: Resultsmentioning

confidence: 99%

Section: Experiments With Ptfe Composites Filled With Different Compomentioning

confidence: 99%

Interface enhancement between polytetrafluoroethylene and glass fibers modified with a titanate coupler

Jiang

Zhu

Zhang

et al. 2016

J of Applied Polymer Sci

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“…The TESSA machine has been developed by TEKNIKER to measure the friction, wear, and leakage of the dynamic seals [23][24][25][26][27][28]. It can reach a maximum speed of 6 m/s.…”

Section: The Tessa Machinementioning

confidence: 99%

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

Igartua¹,

Bayón²,

Aranzabe³

et al. 2019

Friction, Lubrication and Wear

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This chapter describes a summary of the main tribological achievements carried out in TEKNIKER during the last 37 years. It covers the description of commercial and newly developed tribological test benches and case studies for a wide variety of applications. The examples refer to different tribological characterization tools for material selection (e.g., composition, surface treatments, lubricants). It makes emphasis in the failure mechanisms (pitting, scuffing, abrasion, adhesion, thermal fatigue, tribocorrosion, etc.) and friction simulation of a wide range of materials (seals, textiles, steels, cast iron, light alloys, ceramic, composites), tribological systems (mechanical components, biomaterials, tribolubrication), and environments (vacuum, ultrahigh vacuum, low or high temperature, and corrosive). A huge range of new testing equipment and protocols have been developed to simulate the mentioned failure mechanisms and working environments. This knowledge will make possible, in the future, to simulate at laboratory a still wider list of tribological systems and develop new standards. Tribology will help to implement materials solutions into energy and resource efficient products and process, to reduce carbon footprint.2 with more than 250 scientific contributions in congresses, journals, and books and 3 patents. It has been active in several international working groups and associations, in some of them, acting as Spanish representative:• The COST 516 about tribology (1995)(1996)(1997)(1998)(1999)(2000) • The COST 532 about tribotechnology of engines and transmissions

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“…Even if the contact area significantly affects the results obtained, there are no standard criterion and each model uses different approaches [9]. In the case of polymers, contact temperature estimations are even more complex as their thermo-mechanical properties are strongly influenced by temperature [10][11][12][13][14][15][16]. The importance of considering the evolution of material properties in the case of Polytetrafluoroethylene (PTFE) polymers has been already demonstrated [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The authors found a specific value of roughness which leads to a higher temperature rise, and that the effect of roughness and sliding velocity was larger than the effect of load. Conte et al [13] showed the role of frictional heating on the transfer layer regeneration of PTFE composites. PTFE is a semi-crystalline polymer with a melting temperature of about 330°C and no cross links between the polymeric chains.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis and tribological investigation on TPU and NBR elastomers applied to sealing applications

Pinedo

Hadfield

Tzanakis

et al. 2018

Tribology International

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A B S T R A C TThis study investigates the contact temperatures reached due to frictional heating on TPU (Thermoplastic polyurethane) and NBR (Nitrile butadiene rubber) seal surfaces during operation. These elastomers present limited thermal resistance so an excessive temperature rise may affect their tribological performance. Sliding tests of the elastomers against steel cylinders were carried out and the surface temperature evolution was acquired during the tests using a high precision infrared camera. Frictional behaviour and temperature curves were analyzed. The influence of the experimental parameters, such as the sealing material, sliding velocity, applied load and steel surface conditions was examined. Experimental thermal results were compared with those calculated through well-established analytical models, in order to determine the advantages and limitations of the latter.

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Role of crystallinity on wear behavior of PTFE composites

Cited by 60 publications

References 11 publications

Interface enhancement between polytetrafluoroethylene and glass fibers modified with a titanate coupler

Interface enhancement between polytetrafluoroethylene and glass fibers modified with a titanate coupler

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

Thermal analysis and tribological investigation on TPU and NBR elastomers applied to sealing applications

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