Friction and wear of PTFE-a review

Biswas, SK and Vijayan, Kalyani (1992) Friction and wear of PTFE-a review. Wear, 158. pp. 193-211.

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Polytetrafluoroethylene (PTFE) is an important engineering material. When rubbed or slid against a hard surface, PTFE exhibits a low coefficient of friction but a high rate of wear. These unique properties of the polymer have encouraged many mechanistic and physical examinations of the processes involved in the friction and wear of this polymer. A section13; of such work carried out over the past 30 years is reviewed here. When rubbed against a hard surface, the PTFE chain undergoes scission, creating active groups which chemically13; react with the counterface. This results in strong adhesion and a coherent transfer film.Further interaction between the bulk polymer and the transfer film gives rise to anisotropic13; deformation of the unit cell, which results in closeness of adjacent chains and easy shear between chains. Sliding brings about growth in as well as reorientation of crystalIites situated in a very thin subsurface region of the bulk polymer. Such structural rearrangement facilitates13; the joining of adjacent aligned crystalIites to form films and ribbons which emerge as debris.

Item Type: Article
Uncontrolled Keywords: Polytetrafluoroethylene;Polyethylene;Polyetheretherketone;13; Metal-polymer junction
Subjects: ENGINEERING > Mechanical Engineering
Depositing User: M/S ICAST NAL
Date Deposited: 18 Oct 2006
Last Modified: 07 May 2012 05:24

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