Título

EFFECT OF TEMPERATURE AND ATMOSPHERE ON THE TRIBOLOGICAL BEHAVIOUR OF HIGH TRIBOLOGICAL PERFORMANCE PEEK (POLYETHER ETHER KETONE) COMPOSITE

Autoria

Felipe Darabas Rzatki; Diego Vinicius Dalevedo Barboza; Renan Muller Schroeder; Guilherme Mariz de Oliveira Barra; Cristiano Binder; Aloisio Nelmo Klein; José Daniel Biasoli de Mello

DOI

10.5151/1472-5836-25733

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Resumo

Polyether ether ketone (PEEK) is a high performance thermoplastic often selected for high temperature tribological applications under chemically aggressive environments. The present work evaluate the tribological behavior of a high performance PEEK composite under ambient and high temperature (30 and 80°C, respectively). The atmosphere was also varied (air or tetrafluorethane). An AMTI tribometer equipped with a hermetic chamber and a heating system was used to carry out sliding tests of PEEK cylinders on 304 stainless steel polished discs (Sq < 10 nm) with reciprocating movement and 175 N normal force. Surfaces roughness analyses were performed with a white light interferometer. As expected, there was a strong influence of temperature on the tribological behavior of the samples tested in ambient atmosphere (25% decrease in friction coefficient associated with a 100% increase in wear rate). On the other hand, samples tested in tetrafluorethane atmosphere showed no significant friction temperature dependence.

 

Palavras-chave

Solid lubricant; Thermoplastics; Environment; Temperature