YÜKSEK HIZ VE BASINÇ ŞARTLARINDA ÇALIŞAN YÜKSEK PERFORMANSLI POLİETERETERKETON TERMOPLASTİK POLİMERİNİN AŞINMA VE SÜRTÜNME DAVRANIŞLARININ BELİRLENMESİ

Abstract

Bu deneysel çalışmada, yüksek performanslı mühendislik plastikleri arasında yer alan poli-eter-eter-keton (PEEK) polimerinin AISI304 paslanmaz çelik diske karşı kuru kayma şartları altındaki tribolojik performansları incelenmiştir. Aşınma deneyleri, 1.77, 3.54, 5.30 ve 8.84MPa gibi yüksek basınçlarda, 0.5, 1.0, 2.0 ve 4.0m/s gibi yüksek kayma hızlarında pim-disk aşınma cihazında gerçekleştirilmiştir. Aşınma test sonuçlarına göre, artan kayma hızı ile birlikte sürtünme katsayısı ve aşınma oranı değerleri artmıştır. Düşük yük ve kayma hızlarında düşük P.V değerleri elde edilirken artan yük ve kayma hızı ile birlikte P.V faktörünün arttığı belirlenmiştir. Genel olarak deneylerde kullanılan basınç ve kayma hızı aralıklarında sürtünme katsayısının 0.17 ile 0.39 aralığında elde edilirken, aşınma oranının ise 5.2×10-15 ile 21.4×10-15 m2/N arasında değiştiği tespit edilmiştir. Deneylerde kullanılan PEEK malzemenin yüksek P.V değerlerinde abrazif aşınma mekanizması gözlenirken düşük P.V değerlerinde adhezif aşınma mekanizması gözlenmiştir.

Keywords

• PEEK
• Aşınma
• Sürtünme
• Basınç
• Kayma Hızı.

EVALUATION OF FRICTION AND WEAR BEHAVIORS OF HIGH PERFORMANCE POLYETHERETHERKETONE THERMOPLASTIC POLYMER UNDER HIGH PRESSURE AND SLIDING SPEED CONDITIONS

Abstract

This experimental study examines the tribological performance of poly-ether-ether-ketone (PEEK) polymer, which is one of the high performance engineering plastics, against AISI 304 stainless steel disc under dry sliding conditions. Tribological tests were carried out on a pin-on-disc wear test machine under high applied pressures of 1.77, 3.54, 5.30 and 8.84MPa and at high sliding speeds of 0.5, 1.0, 2.0 and 4.0m/s. According to the wear test results, the friction coefficient and wear rate values increased with the increase in sliding speed values. While low P.V values were obtained at low load and sliding speeds, it was determined that the P.V factor increased with increasing load and sliding speed. In general, in the pressure and sliding speed ranges used in the experiments, the friction coefficient was obtained between 0.17 and 0.39, while the wear rate varied between 5.2×10-15 and 21.4×10-15 m2/N. While abrasive wear mechanism observed in PEEK polymer at high P.V values, adhesive wear mechanism observed at low P.V values.

Keywords

• PEEK
• Wear
• Friction
• Pressure
• Sliding speed

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