Wear of cryo-treated engineering polymers and composites

Wear of cryo-treated engineering polymers and composites Polymers and composites are extensively used in wear situations dominated by various types of abrasive mechanisms. Incorporation of fillers and fibers, heat treatment and surface engineering by various chemical and physical techniques have been successfully employed to enhance wear behavior of metals as well as non-metals. In the case of metals, cryo-treatment is an emerging technique for improving wear resistance. However, this tool has not been applied for polymeric materials. Hence, in this paper investigations on the influence of cryo-treatment on wear performance of a series of thermoplastic engineering polymers such as Polyimide (PI), Polyetherimide (PEI), Polytetrafluoroethylene (PTFE), Polycarbonate (PC) and Polyurethane (PU) are presented. A series of composites of PI, PEI and its copolymer with increasing amount of short glass fiber and solid lubricants was also investigated. The selected materials were cryogenically treated at liquid nitrogen temperature for 24 h. Abrasive wear performance was evaluated at ambient temperature for a single pass on a pin-on-disc machine using Silicon Carbide (SiC) paper as a counterface. Comparison of wear rates of treated and untreated samples under various loads revealed that this technique has potential to increase the wear resistance of some polymers and composites. Fiber loading higher than 20%, however, showed deterioration in wear after cryo-treatment. The extent of influence of cryo-treatment on wear resistance depended on the type of base matrix and the nature and amount of fibre or particulate filler. Changes in crystallinity and hardness were studied and correlated with observed wear behavior. Scanning electron microscopy (SEM) was used to investigate changes in morphology due to cryo-treatment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Wear Elsevier

Wear of cryo-treated engineering polymers and composites

Wear, Volume 225 – Apr 1, 1999

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Publisher
Elsevier
Copyright
Copyright © 1999 Elsevier Ltd
ISSN
0043-1648
eISSN
1873-2577
D.O.I.
10.1016/S0043-1648(99)00063-0
Publisher site
See Article on Publisher Site

Abstract

Polymers and composites are extensively used in wear situations dominated by various types of abrasive mechanisms. Incorporation of fillers and fibers, heat treatment and surface engineering by various chemical and physical techniques have been successfully employed to enhance wear behavior of metals as well as non-metals. In the case of metals, cryo-treatment is an emerging technique for improving wear resistance. However, this tool has not been applied for polymeric materials. Hence, in this paper investigations on the influence of cryo-treatment on wear performance of a series of thermoplastic engineering polymers such as Polyimide (PI), Polyetherimide (PEI), Polytetrafluoroethylene (PTFE), Polycarbonate (PC) and Polyurethane (PU) are presented. A series of composites of PI, PEI and its copolymer with increasing amount of short glass fiber and solid lubricants was also investigated. The selected materials were cryogenically treated at liquid nitrogen temperature for 24 h. Abrasive wear performance was evaluated at ambient temperature for a single pass on a pin-on-disc machine using Silicon Carbide (SiC) paper as a counterface. Comparison of wear rates of treated and untreated samples under various loads revealed that this technique has potential to increase the wear resistance of some polymers and composites. Fiber loading higher than 20%, however, showed deterioration in wear after cryo-treatment. The extent of influence of cryo-treatment on wear resistance depended on the type of base matrix and the nature and amount of fibre or particulate filler. Changes in crystallinity and hardness were studied and correlated with observed wear behavior. Scanning electron microscopy (SEM) was used to investigate changes in morphology due to cryo-treatment.

Journal

WearElsevier

Published: Apr 1, 1999

References

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